Unleash Unmatched Power: Orion 1000W Max XTR Series Class D Monoblock Amplifier for Audiophile Experience!
Orion 1000W max XTR series class D monoblock high-performance car audio amplifier.
Specifications:
RMS Power Rating: 4 ohms: 125 watts x 1 chan. / 2 ohms: 250 watts x 1 chan. / 1 ohm: 500 watts x 1 chan.
Max power output: 1000 watts x 1 chan.
Classic Orion industrial design
MOSFET power supply
Wired remote bass level control included
Tuned Bass EQ (0-18 dB bass boost at 45 Hz)
IntelliQ Bass optimization circuit
Single channel monoblock operation
1 Pair of preamp RCA outputs
Master/Copy switch for slave and master control
Heavy duty aluminum alloy heatsink for optimal heat dissipation
Nickel-plated RCA level inputs
Nickel-plated screw terminals
Variable low-pass filter (30-250 Hz, 12 dB/octave)
Phase control switch
Gain adjustment
Subsonic Filter
CEA-2006 compliant amplifier
Frequency response: 30-250 Hz
Dimensions: 9-1/2″D x 10-7/8″W x 2-5/8″H
Legendary Products & Support From Authorized Dealers
When you choose Orion, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized Orion dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by Orion's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized Orion dealer today!
Designed to Be a True Worldwide Product! Orion 1400W RMS XTR series class D monoblock amplifier. Specifications: RMS Power Rating: ¢ 4 ohms: 550 watts x 1 chan. ¢ 2 ohms: 900 watts x 1 chan. ¢ 1 ohm: 1400 watts x 1 chan. Pulse Width Modulated MOSFET power supply Wired remote bass level control included LED power (green) and protect (red) indicators Variable Bass Boost (0 to +18 dB bass boost) Soft start turn-on Mono channel operation Preamp RCA outputs to daisy chain multiple amps 4-way protection circuitry (thermal, DC offset, overload, and speaker short protection) Dual speaker terminals simplify the hookup of multiple speakers Heavy-duty aluminum alloy heat-sink Input sensitivity: Level: 200mV-8V Variable low-pass filter (15-250 Hz, 24 dB/octave) Selectable subsonic filter (25 Hz, 12 dB) CEA-2006 compliant amplifier 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Dimensions: 11-1/2"W x 9-15/16"L x 2-1/2"H
Legendary Products & Support From Authorized Dealers
When you choose Orion, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized Orion dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by Orion's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized Orion dealer today!
Creates a Full-On Sound That Draws People In!
If you need some bass power but your wallet's a little weak, check out the JBL Audio Stage A3001 subwoofer amplifier. This potent little JBL amp sends up to 300 watts RMS to your sub, making your drive more exciting as it fills your ride with low-frequency punch. Speaker-level inputs allow this amplifier to work with most systems, even if you're keeping your factory radio. The built-in low-pass filter, variable bass boost, and phase adjustment maximize your system's performance. No matter what you listen to, the JBL Audio Stage A3001 will deliver the clean bass that makes your music come alive in your car.
Features:
Mono subwoofer amplifier
300 watts RMS x 1 at 2 ohms (4-ohm rating unavailable)
Variable low-pass filter (32-320 Hz, 12 dB/octave)
Variable bass boost (0-12 dB at 40-100 Hz)
Variable phase adjustment (0-180°)
Preamp and speaker-level inputs
Fuse rating: 15A x 2
Wiring and hardware not included with amplifier (8-gauge power and ground leads recommended)
9-9/16″W x 2″H x 5-3/4″D
What's in the Box:
1 x Amplifier
1 x Spare fuse (x2 for 1-channel and 4-channel model)
1 x Quick start guide
1 x High-level input cable (x2 for 4-channel model).
2 x Two-color JBL brand stickers
Legendary Products & Support From Authorized Dealers
When you choose JBL, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized JBL dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by JBL's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized JBL dealer today!
Polk Audio PA Series Amplifiers - Power & Style Without Compromise The PA880 is a single-channel class A/B amplifier with built-in fully variable low-pass crossover. The PA880 monoblock is equipped with optional remote bass EQ control and is capable of one-channel operation with a maximum power of 800 Watts into 2 ohms.
Legendary Products & Support From Authorized Dealers
When you choose Polk Audio, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized Polk Audio dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by Polk Audio's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized Polk Audio dealer today!
Rockford Fosgate R2-750X1 Prime 750 Watt Mono Class-D Subwoofer Amplifier
A 750W mono Class-D subwoofer amplifier rated at 750W x 1 at 1-ohm, 500W x 1 at 2-ohm, and 250W x 1 at 4-ohm (CTA-2006 rated). Features Continuously Variable Punch EQ with up to 18dB of bass boost at 45Hz, variable infrasonic filter, C.L.E.A.N. gain calibration, RCA pass-through outputs, RLC remote level control, Rollback Protection, NOMAD speaker protection, and MEHSA4 heat management. Designed and engineered in Tempe, Arizona. Backed by a 1 year warranty.
Product Overview
The Rockford Fosgate R2-750X1 is a 750W mono Class-D subwoofer amplifier from the Prime R2 series, designed for car audio builds requiring dedicated subwoofer amplification at a strong price-to-performance ratio. As a dedicated single-channel subwoofer amplifier, it operates across a frequency range of 20Hz-250Hz. Rated continuous power is 250W x 1 at 4-ohm, 500W x 1 at 2-ohm, and 750W x 1 at 1-ohm (CTA-2006, less than 1.0% THD+N). Dynamic power via PowerCube reaches 300W at 4-ohm, 545W at 2-ohm, and 830W at 1-ohm.
The Continuously Variable onboard Punch EQ delivers up to 18dB of boost at 45Hz. The variable infrasonic filter is tunable from 15Hz to 40Hz at 12dB/octave, providing adjustable protection for different subwoofer drivers and enclosure types. RCA pass-through outputs are active with both RCA and high-level input, allowing the signal to be passed to a second amplifier without degradation. An RLC remote level control is included for in-cabin subwoofer volume adjustment. High-level inputs (450mV-12V) allow direct integration with OEM head units without RCA outputs. Auto-Sense turn-on via high-level input is supported, with an Auto-Sense bypass switch for vehicles with Retained Accessory Power (RAP) systems.
C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) input and output clip indicators guide precise gain calibration at setup. Rollback Protection dynamically manages output to prevent thermal stress on the output devices. NOMAD provides real-time protection against shorted speaker wires and dangerously low impedances. MEHSA4 reduces MOSFET temperatures, lowers distortion, and extends output device life. Cast aluminium heatsink with convection cooling. Designed and engineered in Tempe, Arizona.
Features & Benefits
750W at 1-Ohm - Maximum Subwoofer Output: The R2-750X1 delivers its maximum rated output of 750W at 1-ohm (830W dynamic), with stepped output of 500W at 2-ohm and 250W at 4-ohm, providing flexibility to match a wide range of subwoofer impedance configurations.
Continuously Variable Punch EQ - Up to 18dB at 45Hz: The onboard Punch EQ provides up to 18dB of continuously adjustable bass boost at 45Hz, allowing subwoofer output to be tuned to the acoustic characteristics of the installation without a separate equaliser.
Variable Infrasonic Filter - 15Hz to 40Hz Tunable: The infrasonic filter is tunable from 15Hz to 40Hz at 12dB/octave, providing flexible protection for different subwoofer drivers and enclosure types beyond what a fixed infrasonic filter can offer.
RCA Pass-Through Outputs - Downstream Chaining: RCA pass-through outputs are active with both RCA and high-level input, allowing the signal to be passed to a downstream speaker amplifier such as the R2-750X5 without Y-cable noise.
C.L.E.A.N. Technology - Precise Gain Calibration: C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) provides dedicated input and output clip indicator LEDs for precise gain calibration at setup, maximising output while minimising distortion.
RLC Remote Level Control Included: An RLC remote level control is included for in-cabin subwoofer volume adjustment without returning to the amplifier.
Rollback Protection and NOMAD Speaker Protection: Rollback Protection dynamically manages output during sustained high-output conditions to prevent thermal stress on the output devices. NOMAD provides real-time protection against shorted speaker wires and dangerously low impedances.
High-Level OEM Input with Auto-Sense Turn-On: High-level inputs accept OEM head unit speaker outputs, with Auto-Sense activating the amplifier automatically when a signal is detected. A bypass switch is included for vehicles with RAP systems.
Technical Specs
Specification
Detail
SKU
R2-750X1
Number of Channels
1 (Monoblock)
Total Power
750W
Rated Power - 4-ohm (CTA-2006, less than 1.0% THD+N)
250W x 1
Rated Power - 2-ohm (CTA-2006, less than 1.0% THD+N)
500W x 1
Rated Power - 1-ohm (CTA-2006, less than 1.0% THD+N)
750W x 1
Dynamic Power - 4-ohm (PowerCube)
300W x 1
Dynamic Power - 2-ohm (PowerCube)
545W x 1
Dynamic Power - 1-ohm (PowerCube)
830W x 1
Circuit Topology
Class-D
Bridgeable
No
Frequency Response
20 Hz - 250 Hz
THD + Noise
Less than 1.0% at 4-ohm, 2-ohm, and 1-ohm
Input Sensitivity
Low-Level: 150mV - 4V / High-Level: 450mV - 12V
Signal Input
2 x RCA / 4-Pin Molex High-Level
Signal Output
2 x RCA Pass-Thru (active with RCA or High-Level input)
Tone Controls
Punch EQ: 0 to +18dB at 45Hz (Continuously Variable)
Low-Pass Crossover
50 Hz - 250 Hz at 12dB/Octave Butterworth
Infrasonic Filter
15 Hz - 40 Hz at 12dB/Octave Butterworth (Variable)
Remote Controls
Yes (RLC Remote Level Control included)
Auto-Sense Turn-On
Yes (with RAP bypass switch)
Power Wire Gauge
4 AWG
Power Input Connector
Compression Terminal Block
Speaker Wire Gauge
8 AWG
Speaker Output Connector
Compression Terminal Block
Cooling
Convection
Heatsink
Cast Aluminium
Operating Voltage
9 - 16 VDC
Recommended Fuse (not included)
120A
Max Current Draw at 13.8V Sinewave
71A
Visual Indicators
Power: Blue / Protect: Red / C.L.E.A.N. In: Red / C.L.E.A.N. Out: Blue/Red
Dimensions (H x W x D)
49 x 173 x 255mm (1.9 x 6.8 x 10.1 inch)
CTA-2006 Compliant
Yes
Warranty
1 Year
Compatible With / Goes Well With
The R2-750X1 suits car audio builds requiring a dedicated mono subwoofer amplifier at the Prime R2 price point. It pairs naturally with the R2-750X5 via its RCA pass-through outputs for a complete 5-channel plus dedicated mono system.
Goes Well With:
R2-2X12 / R2-2X10 - Rockford Fosgate Prime dual loaded subwoofer enclosures, a direct application pairing with the R2-750X1 at 2-ohm
R2D2-12 / R2D2-10 - Prime R2 series individual subwoofers for custom enclosure builds
R2-750X5 - Companion R2 series 5-channel amplifier for speaker amplification, chainable via the R2-750X1's RCA pass-through outputs
RFK4 - Rockford Fosgate 4 AWG amplifier wiring kit to complete the installation
DSR1 - Rockford Fosgate Digital Signal Processor for advanced signal processing ahead of the R2-750X1
Frequently Asked Questions
What impedance gives the most power from the R2-750X1?
The R2-750X1 delivers maximum rated output at 1-ohm (750W RMS, 830W dynamic). At 2-ohm the output is 500W RMS, and at 4-ohm it is 250W RMS. For maximum subwoofer output, a subwoofer or dual subwoofer configuration wired to a 1-ohm or 2-ohm total load is recommended. Contact us for advice on matching your subwoofer configuration to the correct impedance setting.
What is the difference between the R2-750X1 and the R2-750X5?
The R2-750X1 is a monoblock subwoofer amplifier with a single Class-D channel operating from 20Hz-250Hz, delivering up to 750W RMS at 1-ohm. The R2-750X5 is a 5-channel Full-Range Class-D amplifier delivering 100W x 4 plus 350W x 1 at 2-ohm, designed to power both speakers and a subwoofer from the one unit. In most builds, both are used together - the R2-750X5 for speakers and the R2-750X1 for the subwoofer, connected via the R2-750X1's RCA pass-through outputs.
Can the R2-750X1 be used with a factory OEM head unit?
Yes. The R2-750X1 includes high-level inputs (450mV-12V) for direct connection to OEM head unit speaker outputs without RCA outputs. Auto-Sense turn-on activates the amplifier automatically when a signal is detected on the high-level input, removing the need for a dedicated remote wire. A RAP bypass switch is also included.
What fuse does the R2-750X1 require and is it included?
The R2-750X1 requires a 120A fuse, which is not included and must be sourced separately. Install the fuse as close to the battery as possible in the 4 AWG power supply line.
Does the R2-750X1 work with a dual voice coil subwoofer?
Yes. A dual voice coil (DVC) subwoofer can be wired in parallel to achieve a 1-ohm or 2-ohm load depending on the coil impedance, allowing you to take advantage of the R2-750X1's maximum output at 1-ohm. Contact us for advice on the correct wiring configuration for your specific subwoofer.
Legendary Products & Support From Authorized Dealers
When you choose Frankies BrandBeast, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & TrainingOnly authorized Frankies BrandBeast dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty ProtectionWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.
▸ Reliable Customer SupportIf you ever run into an issue, you’re backed by Frankies BrandBeast’s official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your InvestmentBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?
Choose wisely. Buy from Frankies BrandBeast today!
Rockford Fosgate R2-500X1 Prime 500 Watt Mono Class-D Subwoofer Amplifier
A 500W mono Class-D subwoofer amplifier rated at 500W x 1 at 2-ohm and 300W x 1 at 4-ohm (CTA-2006 rated). Features Continuously Variable Punch EQ with up to 18dB of bass boost at 45Hz, variable infrasonic filter, C.L.E.A.N. gain calibration, RCA pass-through outputs, RLC remote level control, Rollback Protection, NOMAD speaker protection, and MEHSA4 heat management. Designed and engineered in Tempe, Arizona. Backed by a 1 year warranty.
Product Overview
The Rockford Fosgate R2-500X1 is a 500W mono Class-D subwoofer amplifier from the Prime R2 series, designed for car audio builds requiring dedicated subwoofer amplification at a strong price-to-performance ratio. As a dedicated single-channel subwoofer amplifier, it operates across a frequency range of 20Hz-250Hz. Rated continuous power is 300W x 1 at 4-ohm and 500W x 1 at 2-ohm (CTA-2006, less than 1.0% THD+N). Dynamic power via PowerCube reaches 350W at 4-ohm and 590W at 2-ohm.
Unlike the R2-750X1 which is also 1-ohm stable, the R2-500X1 operates at 4-ohm or 2-ohm only. The Continuously Variable onboard Punch EQ delivers up to 18dB of boost at 45Hz. The variable infrasonic filter is tunable from 15Hz to 40Hz at 12dB/octave, providing flexible protection for different subwoofer drivers and enclosure types. RCA pass-through outputs allow the signal to be chained to a companion speaker amplifier. An RLC remote level control is included for in-cabin subwoofer volume adjustment.
High-level inputs (450mV-12V) allow direct integration with OEM head units without RCA outputs. Auto-Sense turn-on activates the amplifier automatically when a signal is detected, with a bypass switch for vehicles with Retained Accessory Power (RAP) systems. C.L.E.A.N. input and output clip indicators guide precise gain calibration. Rollback Protection, NOMAD speaker protection, and MEHSA4 heat management are all active. Cast aluminium heatsink with convection cooling. Designed and engineered in Tempe, Arizona.
Features & Benefits
500W at 2-Ohm - High Output Mono Subwoofer Performance: The R2-500X1 delivers 500W RMS at 2-ohm (590W dynamic) and 300W RMS at 4-ohm, providing substantial subwoofer output for the Prime R2 price point.
Continuously Variable Punch EQ - Up to 18dB at 45Hz: The onboard Punch EQ provides up to 18dB of continuously adjustable bass boost at 45Hz, allowing subwoofer output to be tuned to the acoustic characteristics of the installation without a separate equaliser.
Variable Infrasonic Filter - 15Hz to 40Hz Tunable: The infrasonic filter is tunable from 15Hz to 40Hz at 12dB/octave, providing flexible and adjustable protection for different subwoofer drivers and enclosure types.
RCA Pass-Through Outputs - Downstream Chaining: RCA pass-through outputs are active with both RCA and high-level input, allowing the signal to be passed to a downstream speaker amplifier such as the R2-500X4 without Y-cable noise or signal degradation.
C.L.E.A.N. Technology - Precise Gain Calibration: C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) provides dedicated input and output clip indicator LEDs for precise gain calibration at setup, maximising output while minimising distortion.
RLC Remote Level Control Included: An RLC remote level control is included for in-cabin subwoofer volume adjustment without returning to the amplifier.
Rollback Protection and NOMAD Speaker Protection: Rollback Protection dynamically manages output during sustained high-output conditions to prevent thermal stress on the output devices. NOMAD provides real-time protection against shorted speaker wires and dangerously low impedances.
Auto-Sense Turn-On with RAP Bypass: Auto-Sense activates the amplifier automatically when a high-level input signal is detected, removing the need for a dedicated remote turn-on wire. A bypass switch is included for vehicles with RAP systems.
Technical Specs
Specification
Detail
SKU
R2-500X1
Number of Channels
1 (Monoblock)
Total Power
500W
Rated Power - 4-ohm (CTA-2006, less than 1.0% THD+N)
300W x 1
Rated Power - 2-ohm (CTA-2006, less than 1.0% THD+N)
500W x 1
Dynamic Power - 4-ohm (PowerCube)
350W x 1
Dynamic Power - 2-ohm (PowerCube)
590W x 1
Circuit Topology
Class-D
Bridgeable
No
Frequency Response
20 Hz - 250 Hz
THD + Noise
Less than 1.0% at 4-ohm and 2-ohm
Input Sensitivity
Low-Level: 150mV - 4V / High-Level: 450mV - 12V
Signal Input
2 x RCA / 4-Pin Molex High-Level
Signal Output
2 x RCA Pass-Thru (active with RCA or High-Level input)
Tone Controls
Punch EQ: 0 to +18dB at 45Hz (Continuously Variable)
Low-Pass Crossover
50 Hz - 250 Hz at 12dB/Octave Butterworth
Infrasonic Filter
15 Hz - 40 Hz at 12dB/Octave Butterworth (Variable)
Remote Controls
Yes (RLC Remote Level Control included)
Auto-Sense Turn-On
Yes (with RAP bypass switch)
Power Wire Gauge
4 AWG
Power Input Connector
Compression Terminal Block
Speaker Wire Gauge
8 AWG
Speaker Output Connector
Compression Terminal Block
Cooling
Convection
Heatsink
Cast Aluminium
Operating Voltage
9 - 16 VDC
Recommended Fuse (not included)
80A
Max Current Draw at 13.8V Sinewave
52A
Visual Indicators
Power: Blue / Protect: Red / C.L.E.A.N. In: Red / C.L.E.A.N. Out: Blue/Red
Dimensions (H x W x D)
49 x 173 x 215mm (1.9 x 6.8 x 8.5 inch)
CTA-2006 Compliant
Yes
Warranty
1 Year
Compatible With / Goes Well With
The R2-500X1 suits car audio builds requiring a dedicated mono subwoofer amplifier at the Prime R2 price point. Its RCA pass-through outputs pair naturally with the R2-500X4 4-channel speaker amplifier for a complete R2 series system.
Goes Well With:
R2-2X12 / R2-2X10 - Rockford Fosgate Prime dual loaded subwoofer enclosures, a matched Prime series pairing for the R2-500X1 at 2-ohm
R2D2-12 / R2D2-10 - Prime R2 series individual subwoofers for custom enclosure builds
R2-500X4 - Companion R2 series 4-channel speaker amplifier, chainable via the R2-500X1's RCA pass-through outputs
R2-750X5 - Alternative single-unit R2 5-channel amplifier if a combined speaker and subwoofer solution is preferred
RFK4 - Rockford Fosgate 4 AWG amplifier wiring kit to complete the installation
Frequently Asked Questions
What is the difference between the R2-500X1 and the R2-750X1?
Both are Prime R2 series mono Class-D subwoofer amplifiers with Punch EQ, variable infrasonic filter, RLC remote, and RCA pass-through. The key differences are maximum rated output and impedance stability. The R2-500X1 delivers 500W RMS at 2-ohm and 300W at 4-ohm, with no 1-ohm rating. The R2-750X1 delivers 750W RMS at 1-ohm, 500W at 2-ohm, and 250W at 4-ohm, adding 1-ohm stability for builds using a dual voice coil subwoofer wired to 1-ohm. The R2-500X1 also uses a smaller 80A fuse versus 120A on the R2-750X1. Choose the R2-500X1 for 2-ohm or 4-ohm subwoofer builds; choose the R2-750X1 for maximum output or 1-ohm stability.
What impedance gives the most power from the R2-500X1?
The R2-500X1 delivers maximum rated output at 2-ohm (500W RMS, 590W dynamic). At 4-ohm the rated output is 300W RMS. The R2-500X1 is not 1-ohm rated. For maximum output, pairing with a subwoofer or dual subwoofer configuration wired to a 2-ohm total load is recommended.
Can the R2-500X1 be used with a factory OEM head unit?
Yes. High-level inputs accept OEM head unit speaker outputs at 450mV-12V. Auto-Sense turn-on activates the amplifier automatically when a signal is detected on the high-level input, removing the need for a dedicated remote wire. A RAP bypass switch is also included.
What fuse does the R2-500X1 require and is it included?
The R2-500X1 requires an 80A fuse, which is not included and must be sourced separately. The maximum sinewave current draw is 52A. Install the fuse as close to the battery as possible in the 4 AWG power supply line.
Can I add a speaker amplifier to a system using the R2-500X1?
Yes. The R2-500X1 includes RCA pass-through outputs that are active with both RCA and high-level input, allowing a clean signal to be passed to a downstream 4-channel speaker amplifier such as the R2-500X4. This is the recommended configuration for a complete R2 series car audio system.Legendary Products & Support From Authorized Dealers
When you choose Frankies BrandBeast, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & TrainingOnly authorized Frankies BrandBeast dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty ProtectionWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.
▸ Reliable Customer SupportIf you ever run into an issue, you’re backed by Frankies BrandBeast’s official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your InvestmentBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?
Choose wisely. Buy from Frankies BrandBeast today!
Rockford Fosgate R2-250X1 Prime 250 Watt Mono Class D Amplifier
When your subwoofer demands dedicated power, the R2-250X1 delivers 250 watts of efficient Class D performance with the tuning tools to dial in every detail of your bass.
Product Overview
The R2-250X1 is part of Rockford Fosgate's 3rd generation Prime Series, developed for car audio enthusiasts who want a capable, no-compromise monoblock amplifier at an accessible price. Rated at 250 watts RMS into 2 ohms, it operates as a Class D monoblock designed specifically for subwoofer duty, with a frequency response limited to 20-250 Hz and a variable Low-Pass crossover to match any subwoofer configuration. Beyond raw power, the R2-250X1 comes equipped with an integrated Punch EQ for up to 18 dB of bass boost at 45 Hz, a variable Infrasonic Filter to protect the subwoofer from damaging low-frequency resonance, and an included RLC Remote Level Control for convenient bass adjustment from the driver's seat. MEHSA 4 thermal management and Rollback Protection ensure the amplifier stays reliable under sustained demand, while NOMAD actively monitors outputs against shorts and impedance faults. Designed and engineered in Tempe, Arizona, the R2-250X1 is built by fanatics, for fanatics.
Features & Benefits
C.L.E.A.N. Technology (Patent 8,712,066): Rockford Fosgate's patented Calibrated Level Eliminates Audible Noise circuit uses dedicated input and output clip LEDs (C.L.E.A.N. IN Red, C.L.E.A.N. OUT Blue/Red) to accurately match the source unit's output to the amplifier's input sensitivity, removing distortion before it reaches the subwoofer.
P.O.W.E.R. Supply: Onboard power supply design that continues to generate output above the rated RMS figure as vehicle voltage increases, so real-world performance scales beyond the spec sheet across the 9-16V operating range.
Integrated Punch EQ: Continuously variable onboard bass equaliser providing 0 to +18 dB of boost at 45 Hz, correcting for acoustic deficiencies in the listening environment and delivering up to 3x the perceived bass without an external processor.
Variable Infrasonic Filter: Adjustable high-pass filter operating from 15 to 40 Hz at 12 dB/octave Butterworth, removing subsonic frequencies that can damage a subwoofer's voice coil and excursion limits without contributing audible bass output.
MEHSA 4 (Maximum Efficiency Heat Sink Application): Advanced thermal management system that reduces MOSFET operating temperatures, lowers distortion levels, increases overall durability, and extends the lifespan of output devices under sustained use.
Rollback Protection: During demanding musical conditions, the amplifier dynamically reduces power demand to prevent stress on output devices, preserving both the amplifier and the connected subwoofer under real-world listening conditions.
NOMAD Protection: A real-time analogue computer that continuously monitors the amplifier's speaker outputs and protects against shorted speaker wires and dangerously low speaker impedances, providing active fault management rather than passive fusing alone.
Balanced Differential Inputs: Differential input topology eliminates noise picked up by signal cables between the source unit and amplifier, delivering a cleaner signal into the amplifier stage.
Includes RLC Remote Level Control: A remote level control is included in the box, allowing bass output to be adjusted from the driver's seat without accessing the amplifier directly.
High Level Input Capable: Accepts both low-level RCA (150mV-4V) and high-level speaker signals (450mV-12V), making integration with factory head units straightforward.
Auto-Sense RAP Bypass: Auto-Sense bypass switch supports vehicles with Retained Accessory Power (RAP), allowing the amplifier to power on and off correctly using speaker-level signal detection without requiring a dedicated remote turn-on wire.
RCA Pass-Through Outputs: 2-channel RCA pass-through remains active with both RCA and high-level inputs, allowing an additional amplifier to be added downstream without splitting cables at the head unit.
CTA-2006 and CE Compliant: All power ratings verified at 14.4V with 1% or less THD to CTA-2006 industry standards, with no inflated peak figures used anywhere in the specifications.
Technical Specs
Specification
Detail
SKU
R2-250X1
Series
Prime
Number of Channels
1
Amplifier Class
Class D
Total RMS Power
250W
RMS Power @ 4 Ohm
150W x 1
RMS Power @ 2 Ohm
250W x 1
Dynamic Power @ 4 Ohm
209W x 1
Dynamic Power @ 2 Ohm
328W x 1
Bridgeable
No
Frequency Response
20 Hz - 250 Hz
THD @ 4 Ohm
<1.0%
THD @ 2 Ohm
<1.0%
Input Sensitivity (Low-Level)
150 mV - 4V
Input Sensitivity (High-Level)
450 mV - 12V
Signal Input
2 x RCA low-level, 4-Pin Molex high-level
Signal Output
2 x RCA pass-through (active with RCA or high-level input)
Punch EQ
0 to +18 dB @ 45 Hz
Low-Pass Crossover
50-250 Hz @ 12 dB/octave Butterworth
Infrasonic Filter
15-40 Hz @ 12 dB/octave Butterworth
Remote Controls
Yes (RLC Remote Level Control included)
Visual Indicators
POWER (Blue), PROTECT (Red), C.L.E.A.N. IN (Red), C.L.E.A.N. OUT (Blue/Red)
Operating Voltage
9-16V DC
Recommended Fuse
50A (not included)
Power Wire Gauge
4 AWG
Speaker Wire Gauge
8 AWG
Power Input Connector
Compression Terminal Block
Speaker Output Connector
Compression Terminal Block
Cooling
Convection / Heatsink (MEHSA 4)
Dimensions (H x W x D)
1.9" x 6.8" x 8.1" (4.9 cm x 17.3 cm x 20.5 cm)
Warranty
1 Year
Compliance
CTA-2006, CE
Goes Well With
The R2-250X1 pairs naturally with Rockford Fosgate Prime R1 and R2 subwoofers, including the R1S410, R1S412, R2SD2-12, and R2D2-12, giving it a matched system from a single brand. A 4-gauge amplifier wiring kit is required for power and ground runs, and 8-gauge cable is needed for the speaker output. A quality pair of RCA interconnects is recommended for clean signal transfer from the head unit. For systems requiring additional channels for front and rear speakers, the R2-250X1 pairs directly with the R2-300X4 using the onboard RCA pass-through.
Frequently Asked Questions
What is the R2-250X1 designed for, and can it power full-range speakers?
The R2-250X1 is a dedicated monoblock amplifier designed specifically for subwoofer applications. Its frequency response is limited to 20-250 Hz and its crossover controls are Low-Pass and Infrasonic only, making it unsuitable for powering full-range or component speakers. For full-range speaker channels, a separate 4-channel amplifier such as the R2-300X4 is required.
What does the Infrasonic Filter do, and why is it important for a subwoofer?
The variable Infrasonic Filter removes subsonic frequencies below 15-40 Hz (adjustable) that are inaudible to the human ear but cause excessive cone excursion in a subwoofer. Without this filter, ported subwoofer enclosures in particular can be damaged by these frequencies at high power. Setting the filter appropriately extends subwoofer lifespan and allows the amplifier to focus available power within the audible bass range.
Does the R2-250X1 include a remote bass control, and how does it work?
Yes. An RLC Remote Level Control is included in the box. It connects to the remote level control input on the amplifier and allows the driver to adjust bass output level from a convenient dash-mounted position without accessing the amplifier. This is particularly useful when the amplifier is installed in a boot or under a seat.
What does Rollback Protection do?
During sustained high-demand listening conditions, Rollback Protection dynamically reduces the amplifier's power output to prevent thermal stress on the output devices. Rather than shutting the amplifier down entirely, it maintains audio playback at a reduced level, protecting the amplifier and connected subwoofer while keeping the system running.
What gauge wire is required, and is the fuse included?
The R2-250X1 requires 4 AWG power and ground wire and 8 AWG speaker wire, both using the onboard compression terminal block connectors. The recommended 50A fuse is not included in the box and must be sourced separately. The fuse should be installed in the power cable as close to the battery as possible.
Legendary Products & Support From Authorized Dealers
When you choose Frankies BrandBeast, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & TrainingOnly authorized Frankies BrandBeast dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty ProtectionWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.
▸ Reliable Customer SupportIf you ever run into an issue, you’re backed by Frankies BrandBeast’s official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your InvestmentBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?
Choose wisely. Buy from Frankies BrandBeast today!
Infinity PRIMUS 3000A 300W x 1 Amplifier: Designed To Deliver Infinity's Signature Sound In More Vehicles
Infinity Primus Amps are available in a variety of configurations, delivering the right power and number of channels for full-range and subwoofer applications. For more than four decades, Infinity has made the audio experience a lot more satisfying for the car audio enthusiast. With a broad array of loudspeakers, amplifiers and subwooers available, you can drive with ease and exhilaration. These compact amps are equipped with all the important inputs and user controls including a bass EQ as well as LPF and HPF crossover controls for tailoring sound to suit the characteristics of different vehicles. The Primus Amps are easily installed and amazingly reliable - and once they turn on, they'll make a transducer sit up and sing.
Infinity PRIMUS3000A Features:
Value EngineeredPrimus amplifier provides true Infinity performance at an affordable price while now lacking the features needed to properely tune and optimize performance.
Compact FootprintWith it becoming more and more difficult to find spacious locations for amplifier mounting, Primus has been developed in a small compact form factor to allow more location versatility.
Full On-Board ProtectionPrimus amplifier has on-board circuitry to protect them from shorts, temperature, overvoltage and undervoltage. An LED indicator is inlcuded on all four models to let you know when one of these conditions exists.
ReliabilityInfinity is one of the best selling car audio brands in the world. This is not a coincidence given the arduous testing and quality control. We take our crat seriously and want every consumer to have a world class experience that lasts and lasts.
Input SensitivityAn input level control adjusts input sensitivity. When low level nputs are used, this control can adjust the input between 200mVrms and 6.0Vrms. When high level inputs are used, the control adjusts the input between 0.5Vrms and 15Vrms. This allows Primus amps to be conntected to virtually any factory system or serve as the foundation for a trophy winning aftermarket competition system.
Switchable Bass EQThis provides an available bass boost at 45Hz of 6dB or 12dB, serving as a great tool to optimize subwoofer and loudspeaker performance based on location and enclosure type.
Cool Industrial DesignBlack with grooved center panel, polished badge, black painted end panels and bottom.
What's in the Box:
1x Amplifier
1x Spare Fuse (x2 for 1-channel and 4-channel model)
1x Quick start guide
1x High-level input cable (x2 for 4-channel model).
1x Mounting hardware
1x Mounting screws
Legendary Products & Support From Authorized Dealers
When you choose Infinity, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized Infinity dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by Infinity's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized Infinity dealer today!
Small footprint. Serious bass. BRT efficiency for bikes, ATVs, and hybrid vehicles.
Product Overview
The Rockford Fosgate PBR300X1 is a 300W mono subwoofer amplifier from the Punch series, built specifically for vehicles where space and electrical load are genuine constraints. Unlike conventional car amplifiers that rely on a switching power supply, the PBR300X1 uses Rockford Fosgate's proprietary BRT (Boosted Rail Technology) an ultra-efficient design that generates 300W of output without the inefficiencies and electrical noise associated with a traditional switching supply.
The result is an amplifier that draws significantly less current from the vehicle's electrical system, making it an ideal choice for motorcycles, ATVs, and hybrid-electric vehicles where alternator capacity and mounting space are limited. The ultra-compact chassis fits into locations where a conventional amplifier simply won't. A variable hi-level DC offset turn-on circuit (4–6V) allows plug-and-play integration with OEM and factory speaker outputs no dedicated remote turn-on wire required in most motorcycle and recreational vehicle installations. A built-in 12dB/octave Butterworth crossover filters the signal before it reaches your subwoofer, and high-level inputs accept signal directly from factory speaker outputs.
Key Specifications
Channels: 1 (mono)
Output power: 300W (impedance breakdown — not specified by supplier)
Power supply technology: BRT (Boosted Rail Technology — no switching power supply)
Output stage: MOSFET
Crossover: 12dB/octave Butterworth (frequency range — not specified)
Signal input: High level
Turn-on method: Variable hi-level DC offset (4–6V)
Chassis: Ultra-compact
Frequency response: Not specified
Input sensitivity: Not specified
Nominal impedance: Not specified
CEA compliance: Not specified in provided data
Dimensions: Not specified
Power wire gauge: Not specified
Recommended fuse: Not specified
Features & Benefits
BRT (Boosted Rail Technology) — No Switching Power Supply — Conventional amplifiers use a switching power supply to step up battery voltage before amplification. BRT bypasses this stage entirely, achieving 300W of output through a fundamentally different electrical architecture. This reduces current draw, lowers electrical noise, and shrinks the chassis — critical for motorcycles and hybrid vehicles where alternator output and installation space are tightly constrained.
Ultra-Compact Chassis — The PBR300X1 is specifically engineered for installations where a standard amplifier will not physically fit. Saddlebag runs, under-seat motorcycle mounts, ATV storage compartments, and tight boot builds are all viable locations. Exact dimensions are not specified in supplier-provided data — confirm with Rockford Fosgate before planning the install.
Variable Hi-Level DC Offset Turn-On (4–6V) — Many motorcycle and OEM audio systems do not provide a standard 12V remote turn-on output. The PBR300X1 includes a variable DC offset turn-on circuit that detects a 4–6V signal on the speaker outputs and powers the amplifier accordingly — eliminating the need to source and run a dedicated remote wire in most factory and recreational vehicle installations.
High-Level Inputs — Accepts signal directly from the speaker outputs of a factory head unit or OEM radio. No line output converter or aftermarket head unit is required for integration — particularly useful in motorcycle and ATV builds where changing the source unit may not be practical.
MOSFET Output Stage — The MOSFET output stage delivers efficient, low-distortion power to the subwoofer load and contributes to the overall compact, low-heat design of the PBR300X1. MOSFET designs are well regarded for reliability under the variable voltage and vibration conditions common in motorcycle and off-road vehicle environments.
12dB/Octave Butterworth Low-Pass Crossover — The on-board Butterworth crossover filters out midrange and high frequencies before they reach the subwoofer. A 12dB/octave slope provides a smooth, musical roll-off well-suited to subwoofer applications. Crossover frequency range is not specified in provided data — confirm with Rockford Fosgate.
Technical Specs
Specification
Detail
Channels
1 (mono)
Output power
300W total rated
Power by impedance
Not specified
Power supply
BRT — no switching power supply
Output stage
MOSFET
Circuit topology
Not specified
Frequency response
Not specified
Input sensitivity
Not specified
THD+Noise
Not specified
Nominal impedance
Not specified
Crossover type
12dB/octave Butterworth
Crossover frequency range
Not specified
Signal input
High level
Turn-on method
Variable hi-level DC offset, 4–6V
Phase control
Not specified
CEA compliance
Not specified
Power wire gauge
Not specified
Speaker wire gauge
Not specified
Operating voltage
Not specified
Recommended fuse
Not specified
Dimensions
Not specified
Weight
1.25 kg
Compatible With / Goes Well With
The PBR300X1 is confirmed by the manufacturer for use in the following applications:
Motorcycles with factory or aftermarket subwoofer systems
ATVs and off-road recreational vehicles
Hybrid-electric vehicles with limited alternator capacity
Recreational vehicles requiring a compact subwoofer amplifier
OEM/factory audio systems (via high-level DC offset turn-on)
Goes well with:
Compact or shallow-mount subwoofers suited to motorcycle and ATV enclosures
Rockford Fosgate Punch series compact subwoofer drivers
Factory head units and OEM audio systems (high-level input compatible)
Frequently Asked Questions
What is BRT (Boosted Rail Technology) and why does it matter?
BRT is Rockford Fosgate's proprietary amplifier architecture that produces 300W of output without a conventional switching power supply. This reduces current draw, minimises electrical noise, and allows a significantly smaller chassis — making it practical for motorcycles, ATVs, and hybrid vehicles.
Will the PBR300X1 work on a motorcycle or ATV?
Yes. The PBR300X1 is specifically designed for motorcycles, ATVs, and other recreational vehicles where electrical capacity and mounting space are limited. The BRT design keeps current draw low and the chassis small enough for tight installation locations.
What is the variable DC offset turn-on circuit?
Many motorcycles and OEM systems don't have a dedicated remote turn-on output. The PBR300X1 detects a 4–6V DC offset on the speaker inputs and uses this signal to power up the amplifier automatically — simplifying installation in factory and recreational vehicle audio systems.
Does the PBR300X1 include a built-in crossover?
Yes. A 12dB/octave Butterworth low-pass crossover is built in, filtering the signal to suit subwoofer use. The adjustable frequency range is not confirmed in supplier-provided data — contact Rockford Fosgate for details before purchase.
Can the PBR300X1 accept signal from a factory head unit?
Yes. High-level inputs allow direct connection to factory speaker outputs, making integration with OEM systems and motorcycle radios straightforward without the need for a separate line output converter.
Legendary Products & Support From Authorized Dealers
When you choose Frankies BrandBeast, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & TrainingOnly authorized Frankies BrandBeast dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty ProtectionWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.
▸ Reliable Customer SupportIf you ever run into an issue, you’re backed by Frankies BrandBeast’s official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your InvestmentBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?
Choose wisely. Buy from Frankies BrandBeast today!
Performance You Expect From Infinity - Power and Efficiency! Kappa mono and full-range, multi-channel amplifiers deliver the efficiency and power you expect from Class D amps‚Äîand the performance you expect from Infinity.. Each model in the lineup will accept both high-level or low-level inputs, allowing the JBL Stadium amplifiers to be added to virtually any car audio system, including factory installed systems. The 2-, 4- and 5-channel amplifiers offer Bluetooth¬Æ audio streaming, exclusive Clari-Fi™ music restoration technology that analyzes and improves the audio quality of compressed files in real time, a multi-pairing Party Mode that lets anyone in the car stream music, and a cabin-mounted control panel. Kappa amplifiers give you the power to shape your car audio experience in new ways. Bluetooth¬Æ Audio Streaming and Telephony Support The three full-range, multi-channel Kappa amplifiers (K2, K4 and K5 models) feature Bluetooth¬Æ connectivity for wireless audio streaming from phones and other devices. You can receive phone calls through your car audio system, just by touching a button on an included control panel. Clari-Fi™ Audio Restoration Technology Clari-Fi™, a proprietary DSP technology is incorporated in the K2, K4 and K5 amplifiers, analyzes music files and improves highly compressed digital music files in real time. A predictive algorithm restores audio content that is discarded in the compression process. Clari-Fi™ works with all playback devices and audio sources. It extends high-frequency bandwidth, restores the natural warmth of vocals and widens the sound stage. In short, Clari-Fi™ gives your digital music back its soul. Party Mode Wireless Pairing The K2, K4 and K5 amplifiers offer Party Mode, a multi-pairing capability that enables Bluetooth¬Æ devices to stream audio individually. When Party Mode is selected from the cabin-mounted control panel, anyone in the car can drive the music. Cabin-Mounted Control Panel The K2, K4 and K5 multi-channel amps come with a wired control panel that incorporates an omni-directional microphone and puts a range of functions at your fingertips. You can activate Bluetooth¬Æ pairings, accept and end phone calls, select Party Mode and cancel Clari-Fi™. Class-D Amplification Every Kappa amplifier, including the full-range models, is a Class D. These high-efficiency, low-heat amps generate a lot of power without drawing much current, and feature small footprints. Full-Range Line Outputs The full-range Kappa amplifiers (K2, K4 and K5) include full-range line outputs. This enables them to pass the audio signal to additional amps that power subwoofers, increasing your system configuration options. Upgradable Firmware Kappa amplifiers incorporate a mini-USB port that enables you to easily upgrade firmware. ADAS Input Four-channel, priority inputs on the full-range Kappa amplifiers override the playing source when a signal is detected from Advanced Driver Assistance Systems. DBO™ (Dynamic Bass Optimizer) Kappa amps feature a subsonic filter in with variable frequency and Q. For sealed enclosures, set the Frequency Control to 35Hz, and then adjust the Boost Control to your preference. For vented enclosures, set the Frequency Control to 10Hz below the port tuning, then adjust the Boost control to your preference. Sleek Design Sometimes, an amp can be as stylish as it powerful. With brushed steel and screwdriver access concealed by a magnetically attached panel, Kappa amplifiers have a clean, streamlined industrial design.
Legendary Products & Support From Authorized Dealers
When you choose Infinity, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & Training
Only authorized Infinity dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty Protection:
We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support.
▸ Reliable Customer Support:
If you ever run into an issue, you're backed by Infinity's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your Investment:
Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that?
Choose wisely. Buy from an authorized Infinity dealer today!
Class-BD power. 1-ohm capable. Engineered for serious subwoofer systems.
Product Overview
The Rockford Fosgate P500X1bd is a 500W mono amplifier from the Punch series, built around Rockford Fosgate's proprietary Class-BD circuit topology a design that produces bass more efficiently than traditional Class A/B amplifiers while maintaining the audio characteristics suited to subwoofer reproduction. The P500X1bd is rated for 500W into a 1-ohm load, giving it the headroom to drive demanding dual voice coil subwoofer configurations that would exceed the capability of standard 2-ohm-minimum amplifiers. A dedicated low-frequency response means this amplifier is optimised exclusively for mid-bass speakers and subwoofers.
The 1-ohm capability opens up two specific subwoofer wiring configurations: a pair of 4-ohm DVC subwoofers wired to a 1-ohm final load, or a quad configuration of 2-ohm DVC subwoofers also presenting a 1-ohm load. The P500X1bd shares the Punch series feature set C.L.E.A.N. gain setup, high-level Auto Turn-On inputs, RCA pass-through outputs, a stealth top-mounted control panel, and optional PLC2 remote level control while adding one feature not found elsewhere in the Punch mono range: an infrasonic filter that protects subwoofers from sub-sonic frequencies that can cause cone over-excursion without producing usable bass output.
Key Specifications
Channels: 1 (mono)
Output power: 500W @ 1 ohm (power at 2Ω and 4Ω — not specified)
Circuit topology: Class-BD
Frequency response: Subwoofer/mid-bass optimised (exact Hz range — not specified)
Crossover: 12dB/octave Butterworth (frequency range — not specified)
Punch EQ: +18dB boost @ 45Hz (see Red-flags)
Infrasonic filter: Yes (frequency — not specified)
Signal input: High level with Auto Turn-On
Signal output: RCA pass-through
Remote control: Optional PLC2 (not included — sold separately)
Clip indicator: Yes (active when PLC2 connected)
Control panel: Top-mounted (stealth)
Setup system: C.L.E.A.N.
Nominal impedance: 1 ohm minimum (confirmed)
Input sensitivity: Not specified
CEA compliance: Not specified in provided data
Power wire gauge: Not specified
Speaker wire gauge: Not specified
Operating voltage: Not specified
Recommended fuse: Not specified
Dimensions: Not specified
Features & Benefits
Class-BD Circuit Topology — Class-BD is Rockford Fosgate's proprietary hybrid amplifier design that delivers bass output more efficiently than a conventional Class A/B amplifier. Lower operating temperatures, reduced current draw, and a compact chassis are the practical outcomes of this efficiency advantage. The topology is specifically tuned for low-frequency reproduction, making it well-matched to subwoofer and mid-bass applications rather than full-range use.
1-Ohm Stable — 500W into 1Ω — The P500X1bd is rated to operate into a 1-ohm load — a capability not common in amplifiers at this price point. This unlocks wiring configurations that would otherwise require a more expensive amplifier: a pair of 4-ohm DVC subwoofers wired to present a 1-ohm combined load, or four 2-ohm DVC subwoofers in a quad configuration doing the same. Power output at 2-ohm and 4-ohm loads is not specified in supplier-provided data — confirm with Rockford Fosgate.
Infrasonic Filter — Subsonic frequencies below the useful range of any subwoofer enclosure (typically below 20–25Hz) cannot be reproduced as audible bass but can cause a subwoofer cone to over-excur — moving further than the driver's mechanical limits allow. This is particularly damaging in ported enclosures tuned to higher frequencies, where cone control below the port tuning point deteriorates rapidly. The P500X1bd's infrasonic filter blocks these frequencies before they reach the driver, protecting the subwoofer without affecting audible bass output. The exact filter frequency is not specified in supplier-provided data — confirm with Rockford Fosgate.
C.L.E.A.N. Setup System — The built-in C.L.E.A.N. (Clean Level Efficient Amplifier Noise) calibration system guides correct gain matching between the head unit and amplifier using an on-board indicator. Gain set too high is one of the most common causes of premature speaker failure and listening fatigue — C.L.E.A.N. removes guesswork and ensures the amplifier operates at its rated output without introducing clipping distortion.
High-Level Input with Auto Turn-On — Accepts signal directly from factory speaker outputs and powers on automatically when signal is detected — no dedicated remote turn-on wire required. Simplifies OEM integration and builds where running a remote wire to the head unit is impractical.
Optional PLC2 Remote Level Control with Clip Indicator — The P500X1bd is ready to accept the Rockford Fosgate PLC2 (sold separately). When connected, the PLC2 provides driver-accessible subwoofer level adjustment and activates an input clip indicator that warns in real time when incoming signal is clipping before it hits the amplifier. The PLC2 is not included — it is an optional accessory.
RCA Pass-Through Outputs — Signal passes through to a second amplifier via RCA outputs — useful in multi-amp builds running the P500X1bd on a subwoofer channel alongside a separate amplifier for mids and highs, without the need for signal splitters or Y-adaptors.
Stealth Top-Mounted Control Panel — Gain, crossover, and EQ controls are positioned on the top surface of the amplifier, remaining accessible after installation in a boot floor, enclosure, or under-seat location. Adjustments can be made without removing the amplifier from the install position.
Muted Turn-On + Full Protection Circuit — Muted start-up prevents the thumps and pops that stress tweeters and subwoofer cones on power-up. Over-current and short-circuit protection are active across the output stage at all times.
Technical Specs
Specification
Detail
Channels
1 (mono)
Output power @ 1Ω
500W
Output power @ 2Ω
Not specified
Output power @ 4Ω
Not specified
Circuit topology
Class-BD
Minimum impedance
1 ohm
Frequency response
Sub/mid-bass optimised (Hz range not specified)
Input sensitivity
Not specified
THD+Noise
Not specified
Crossover type
12dB/octave Butterworth
Crossover frequency range
Not specified
Infrasonic filter
Yes (frequency not specified)
Punch EQ
+18dB @ 45Hz (unverified — see Red-flags)
Signal input
High level (Auto Turn-On)
Signal output
RCA pass-through
Setup system
C.L.E.A.N.
Remote control
Optional PLC2 (sold separately)
Clip indicator
Yes (when PLC2 connected)
Control panel
Top-mounted (stealth)
Muted turn-on
Yes
Protection
Over-current / Short circuit
CEA compliance
Not specified
Power wire gauge
Not specified
Speaker wire gauge
Not specified
Operating voltage
Not specified
Recommended fuse
Not specified
Dimensions
Not specified
Weight
4.89 kg
Compatible With / Goes Well With
The P500X1bd is designed exclusively for subwoofer and mid-bass applications. Confirmed load configurations based on manufacturer-provided information:
Single subwoofer presenting a 1-ohm load (500W RMS — output at other loads not confirmed)
Pair of 4-ohm DVC subwoofers wired to a 1-ohm combined load (confirmed by manufacturer)
Quad configuration of 2-ohm DVC subwoofers wired to a 1-ohm combined load (confirmed by manufacturer)
Factory head units without RCA outputs (via high-level Auto Turn-On input)
Goes well with:
Rockford Fosgate Punch series DVC subwoofers (4-ohm or 2-ohm DVC configurations)
Rockford Fosgate PLC2 Remote Punch Level Control (optional — sold separately)
Ported or sealed subwoofer enclosures (infrasonic filter particularly beneficial with ported designs)
Factory or aftermarket head units (high-level or RCA input compatible)
Frequently Asked Questions
What is Class-BD technology and how does it differ from Class A/B or Class D?
Class-BD is Rockford Fosgate's proprietary hybrid topology designed to reproduce bass more efficiently than Class A/B while remaining optimised for subwoofer-frequency reproduction. The practical result is a more compact, cooler-running amplifier with dedicated low-frequency performance.
What subwoofer configurations does the 1-ohm rating support?
The P500X1bd can drive a pair of 4-ohm DVC subwoofers wired down to a 1-ohm combined load, or a quad of 2-ohm DVC subwoofers in a configuration that also presents a 1-ohm load. Both are confirmed by the manufacturer. Output power at 2-ohm and 4-ohm loads is not specified — confirm with Rockford Fosgate.
What does the infrasonic filter do and do I need it?
The infrasonic filter blocks sub-sonic frequencies below the usable range of the enclosure, preventing cone over-excursion in drivers that cannot reproduce those frequencies as useful bass. It is particularly important for ported enclosures, where cone control deteriorates sharply below the port tuning frequency.
Is the Punch Level Control included with the P500X1bd?
No. The PLC2 remote Punch Level Control is an optional accessory sold separately. The P500X1bd is fully wired to accept the PLC2, which adds driver-accessible subwoofer level adjustment and an active input clip indicator when connected.
What is the C.L.E.A.N. setup system?
C.L.E.A.N. is Rockford Fosgate's on-board gain calibration system. An indicator guides correct gain matching between the head unit output and the amplifier input, preventing the clipping and distortion that results from gain set too high — protecting connected drivers and maintaining clean output at rated power.
Legendary Products & Support From Authorized Dealers
When you choose Frankies BrandBeast, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice:
▸ Expert Knowledge & TrainingOnly authorized Frankies BrandBeast dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.
▸ Authorized Warranty ProtectionWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.
▸ Reliable Customer SupportIf you ever run into an issue, you’re backed by Frankies BrandBeast’s official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.
▸ Protect Your InvestmentBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?
Choose wisely. Buy from Frankies BrandBeast today!
