Description
JL Audio JLA-010-03428-00 AP Monoblock Marine Amplifier - Premium IP67-Rated Compact Subwoofer Amplifier with Class-D Efficiency, 300W x 1 RMS Dedicated Bass Amplification, Optimized 10Hz-500Hz Frequency Response, Variable Low-Pass Crossover, Defeatable Infrasonic Filter, Output Polarity Switch, and Professional Marine Subwoofer Performance for Powerful Boat Bass Systems
Achieve powerful dedicated subwoofer amplification using JL Audio JLA-010-03428-00 AP Monoblock Marine Amplifier—delivering substantial 300W x 1 RMS @ 2 ohm (200W x 1 @ 4 ohm) designed specifically for marine subwoofer applications requiring serious bass output, robust IP67 water and dust protection rating ensuring complete dust-tight seal and protection against powerful water jets from any direction safeguarding internal electronics from harsh saltwater spray and moisture intrusion, advanced Class-D amplifier topology delivering exceptional power efficiency with reduced heat generation and minimal current draw enabling compact installation in confined marine equipment compartments, ultra-compact dimensions measuring 265mm width x 125mm depth x 47mm height (10.43" x 4.9" x 1.85") enabling installation under helm panels or small equipment compartments despite powerful monoblock output, specialized frequency response optimized for subwoofer duty spanning 10Hz-500Hz extending below audible range for deep bass reproduction, variable low-pass crossover filter (20Hz-500Hz, 12dB/octave slope) precisely tailoring subwoofer frequency range for optimal integration with main speakers, defeatable infrasonic filter (20Hz-50Hz adjustable) protecting subwoofers from damaging subsonic frequencies below audible hearing range preventing cone over-excursion, output polarity switch (unique to monoblock configuration) enabling phase adjustment for optimal bass integration with main speakers eliminating bass cancellation, adjustable bass boost EQ (0 to +18dB @ 37Hz) enhancing low-frequency response for systems requiring additional bass impact, wide input sensitivity range (200mV-8V RMS) with switchable low/high settings accommodating various source units, excellent signal-to-noise ratio (>70dB) ensuring clean amplification, comprehensive protection circuits including under/over voltage, over-temperature, and short circuit protection, extreme operating temperature range (-20°C to 65°C), minimal standby current (<1mA), efficient idle current (700-750mA), 35A fuse protection with AFS/AGU/MaxiFuse compatibility, 4 AWG minimum power/ground wire gauge, extensive compatibility with Fusion and JL Audio M3 marine subwoofers, three-year warranty, and proven JL Audio engineering delivering professional-grade dedicated subwoofer amplification for recreational boats, fishing vessels, center console boats, and marine applications requiring powerful reliable bass reproduction with IP67 protection.
Product Overview
JL Audio JLA-010-03428-00 AP monoblock compact marine amplifier with IP67 water/dust rating delivering dedicated subwoofer amplification. Purpose-built for powerful bass reproduction with specialized subwoofer features and optimized frequency response.
Substantial power output: 300W x 1 RMS @ 2 ohm (200W x 1 @ 4 ohm) providing serious subwoofer amplification from compact platform. Sufficient power for most marine subwoofer applications including sealed enclosures, ported enclosures, or infinite baffle installations requiring dedicated bass amplification.
Specialized subwoofer optimization: Frequency response 10Hz-500Hz optimized for bass reproduction extending below audible range for deep impactful bass. Variable low-pass crossover (20Hz-500Hz, 12dB/octave) precisely tailors subwoofer frequency range integrating optimally with main speakers. Typical crossover settings 80-100Hz for sealed enclosures, 100-120Hz for ported enclosures.
Defeatable infrasonic filter (20Hz-50Hz adjustable) protects subwoofers from damaging subsonic frequencies. Subsonic content below 20Hz inaudible to humans but causes excessive cone excursion potentially damaging voice coils or suspensions. Filter prevents mechanical damage while maintaining deep bass extension. Typical setting 25-30Hz provides protection without sacrificing bass impact.
Output polarity switch (unique to monoblock) enables phase adjustment. Inverts subwoofer phase (0° or 180°) for optimal bass integration with main speakers. Proper phase alignment prevents bass cancellation ensuring maximum bass output and smooth frequency response transition between speakers and subwoofer. Adjust by ear selecting phase position delivering strongest bass output.
Adjustable bass boost EQ (0 to +18dB @ 37Hz) enhances low-frequency response. Use judiciously typically 0-6dB enhancement maintaining system balance without overwhelming main speakers or causing subwoofer over-excursion.
IP67 water/dust protection provides complete environmental sealing against harsh marine conditions. Advanced Class-D topology delivers exceptional efficiency reducing heat generation. Ultra-compact dimensions (265mm x 125mm x 47mm) enable installation in tight spaces despite powerful monoblock output.
Wide input sensitivity range (200mV-8V RMS) with switchable low (200mV-2V RMS) and high (800mV-8V RMS) settings accommodates various source equipment. Excellent signal-to-noise ratio (>70dB) ensures clean amplification without background noise.
Comprehensive protection circuits safeguard amplifier and subwoofer: input under/over voltage protection, over-temperature protection, output short circuit protection. Extreme operating temperature range (-20°C to 65°C) ensures reliable performance across seasonal variations.
Minimal standby current (<1mA) prevents battery drain. Idle current 700-750mA minimizes electrical system impact. 35A fuse protection with AFS/AGU/MaxiFuse compatibility. 4 AWG minimum power/ground wire gauge recommended.
Extensive compatibility with Fusion FM/XS Series marine subwoofers and JL Audio M3 Marine Subwoofers. Complete installation package includes amplifier, mounting screws, and documentation. Three-year manufacturer warranty.
Ideal applications: dedicated subwoofer systems requiring substantial bass amplification, systems with separate 4-channel or 6-channel amplifier already powering cabin speakers, upgrades adding subwoofer to existing speaker systems, applications prioritizing specialized subwoofer controls and optimized bass performance.
Dedicated Subwoofer Amplification - Purpose-built monoblock configuration delivering 300W x 1 RMS @ 2 ohm (200W x 1 @ 4 ohm) specifically optimized for marine subwoofer applications requiring serious bass output with specialized subwoofer features and controls.
IP67 Water and Dust Protection - Robust IP67 environmental protection rating providing complete dust-tight seal and protection against powerful water jets from any direction ensuring reliable operation in harsh saltwater spray, moisture exposure, and demanding marine environments.
Optimized Subwoofer Frequency Response - Specialized frequency response (10Hz-500Hz) optimized for subwoofer duty extending below audible range for deep bass reproduction eliminating unnecessary high-frequency amplification focusing power on bass frequencies.
Variable Low-Pass Crossover - Adjustable low-pass filter (20Hz-500Hz, 12dB/octave slope) precisely tailoring subwoofer frequency range for optimal integration with main speakers ensuring seamless transition and preventing frequency overlap.
Defeatable Infrasonic Filter - Adjustable infrasonic filter (20Hz-50Hz, defeatable) protecting subwoofers from damaging subsonic frequencies below audible range preventing cone over-excursion and mechanical damage while maintaining deep bass extension.
Output Polarity Switch - Phase adjustment switch (unique to monoblock configuration) enabling 0° or 180° polarity inversion for optimal bass integration with main speakers preventing bass cancellation and ensuring maximum output.
Advanced Class-D Efficiency - Class-D amplifier topology delivering exceptional power efficiency, reduced heat generation, minimal current draw, and compact dimensions enabling installation in confined marine spaces while maintaining professional monoblock power output.
Ultra-Compact Design - Space-efficient dimensions (265mm x 125mm x 47mm / 10.43" x 4.9" x 1.85") enabling installation under helm panels, behind dash areas, or small equipment compartments despite powerful 300W monoblock output.
Adjustable Bass Boost EQ - Variable bass boost control providing 0 to +18dB gain at 37Hz enhancing low-frequency response for systems requiring additional bass impact with adjustable enhancement maintaining system balance.
Switchable Input Sensitivity - Wide input sensitivity range (200mV-8V RMS) with switchable low (200mV-2V RMS) and high (800mV-8V RMS) settings accommodating aftermarket and OEM source units with various output levels.
Excellent Signal-to-Noise Ratio - Superior signal-to-noise ratio (>70dB referred to 1W, A-weighted) ensuring clean amplification with minimal background noise maintaining audio fidelity and professional sound quality.
Comprehensive Protection Circuits - Multiple protection systems including input under/over voltage protection, over-temperature protection, and output short circuit protection safeguarding amplifier and connected subwoofer from electrical faults.
Extreme Operating Temperature Range - Wide operating temperature range (-20°C to 65°C / -4°F to 149°F) ensuring reliable performance from cold winter storage to hot summer operation in exposed marine installations.
Premium Marine Subwoofer Compatibility - Extensive compatibility with Fusion FM/XS Series marine subwoofers and JL Audio M3 Marine Subwoofers ensuring seamless integration with premium marine bass systems.
Technical Specifications
| Specification |
Details |
| Model |
AP (Monoblock) |
| Part Number |
JLA-010-03428-00 |
| Brand |
JL Audio |
| Product Type |
Marine Amplifier (Monoblock/Subwoofer) |
| Channels |
1 (Monoblock) |
| Amplifier Class |
Class-D |
| Dimensions (W x D x H) |
265 x 125 x 47 mm (10.43" x 4.9" x 1.85") |
| Water/Dust Rating |
IP67 |
| Operating Voltage |
9-16 VDC |
| Operating Temperature |
-20°C to 65°C (-4°F to 149°F) |
| Rated Power @ 4 Ohm |
200W x 1 RMS (<1% THD) |
| Rated Power @ 2 Ohm |
300W x 1 RMS (<1% THD) |
| Frequency Response |
10 Hz - 500 Hz (+0, -1dB) |
| Signal-to-Noise Ratio |
> 70 dB (A-weighted, referred to 1W) |
| THD+N @ Rated Power |
<1% @ 4 Ω |
| Input Sensitivity |
200mV - 8V RMS |
| Input Voltage Range |
Low: 200mV-2V / High: 800mV-8V (switchable) |
| Input Impedance |
11 kΩ (High) / 20 kΩ (Low) |
| Crossover Filter |
Low-Pass (20-500Hz, 12dB/octave) |
| Bass Boost EQ |
0 to +18 dB @ 37 Hz |
| Infrasonic Filter |
20-50 Hz (defeatable) |
| Output Polarity Switch |
Yes |
| Current Draw (Standby) |
<1 mA |
| Current Draw (Idle) |
700-750 mA |
| Fuse Rating |
35 A |
| Recommended Fuse Types |
AFS, AGU, or MaxiFuse |
| Min. Wire Gauge |
4 AWG copper |
| Protection Circuits |
Input under/over voltage, over-temperature, output short circuit |
| Warranty |
3 years |
| Included Accessories |
Amplifier, 4 mounting screws, documentation |
Frequently Asked Questions
Q: What subwoofers work best with the AP Monoblock amplifier?
A: AP Monoblock (300W x 1 @ 2 ohm, 200W x 1 @ 4 ohm) compatible with marine subwoofers rated 200-300W RMS. Recommended: Fusion FM/XS Series marine subwoofers, JL Audio M3 Marine Subwoofers. Match subwoofer impedance to amplifier: 2-ohm subwoofer delivers 300W output (maximum power), 4-ohm subwoofer delivers 200W output. Subwoofer power handling should match or exceed amplifier output preventing damage. Typical marine subwoofers: 10-inch (200-300W RMS), 12-inch (250-400W RMS). Verify subwoofer marine-grade construction with saltwater resistance. Enclosure requirements: sealed, ported, or infinite baffle depending on subwoofer specifications.
Q: How do I set the low-pass crossover and infrasonic filter?
A: Low-pass crossover: Start with 80-100Hz for sealed enclosures or 100-120Hz for ported enclosures. Match main speaker high-pass point ensuring seamless transition. Adjust by ear: increase frequency if bass sounds disconnected from main speakers, decrease if main speakers sound muddy or strained. Infrasonic filter: Enable for subwoofer protection. Set 25-30Hz for most applications maintaining deep bass while preventing subsonic damage. Higher settings (35-50Hz) for smaller subwoofers or ported enclosures. Defeat only if subsonic response required (rare). Bass boost: Start at 0dB, increase gradually (typically 3-6dB maximum) if additional bass impact desired without overpowering system or causing distortion.
Q: What does the output polarity switch do and how do I use it?
A: Output polarity switch inverts subwoofer phase (0° or 180°) for optimal bass integration. Bass waves from subwoofer and main speakers can arrive at listening position in-phase (reinforcing) or out-of-phase (canceling). Adjustment procedure: Play bass-heavy music at moderate volume, switch between 0° and 180° positions, select position delivering stronger deeper bass output (correct phase alignment). Phase issues more noticeable at crossover frequency where subwoofer and speakers overlap. Proper phase alignment ensures maximum bass output and smooth frequency response. Most installations: one position significantly louder indicating correct phase. If minimal difference: phase alignment already optimal or listening position equidistant from speakers/subwoofer.
Q: Can I use the Monoblock amplifier for speakers instead of subwoofers?
A: Not recommended—Monoblock optimized specifically for subwoofer duty. Frequency response (10Hz-500Hz) limited to bass frequencies unsuitable for full-range speakers requiring 20Hz-20kHz. Low-pass filter (20-500Hz) eliminates high frequencies needed for vocals, instruments, treble. Monoblock designed for single-channel subwoofer operation not multiple speaker configurations. For speakers: use 4-Channel AP amplifier (50W x 4) or 6-Channel AP amplifier (50W x 4 plus 100W x 2). Monoblock advantages (output polarity switch, infrasonic filter, optimized bass frequency response) specifically benefit subwoofer applications. Using Monoblock for speakers results in severely limited frequency response without treble/midrange reproduction.
Q: What wire gauge and fusing do I need for Monoblock installation?
A: Required: 4 AWG minimum copper wire (marine-grade tinned) for power and ground, 35A fuse within 18 inches of battery (AFS/AGU/MaxiFuse types), marine-grade fuse holder. Current draw: <1mA standby, 700-750mA idle, approaches 35A at maximum output. Ground wire equally important: same 4 AWG gauge, clean metal-to-metal connection to negative bus bar or battery terminal. Heavier gauge acceptable (2 AWG, 1/0 AWG) for longer runs reducing voltage drop. Verify vessel alternator capacity supports amplifier plus other loads. Professional installation recommended ensuring proper wire sizing and fuse placement meeting marine electrical codes.
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