Description
Punch Pro Passive Crossover 125W RMS, 3kHz 6dB/Octave Low-Pass, Dual Woofer Outputs, Selectable Tweeter Attenuation. For Punch Pro Speakers Only. Sold Individually.
Product Overview
The Rockford Fosgate Punch Pro PP4-X is a passive crossover unit designed exclusively for use with Rockford Fosgate Punch Pro 4-Ohm midrange drivers and tweeters it is not a universal crossover and is not compatible with other brands or other Rockford Fosgate series. The PP4-X must be used in conjunction with the built-in 6dB/octave high-pass crossover in the Punch Pro tweeter the two crossovers work as a system to divide the frequency spectrum between the woofer and tweeter outputs.
The PP4-X handles the woofer channel: it provides a 6dB/octave low-pass filter at 3kHz to two woofer outputs, limiting the frequency content delivered to the Punch Pro midrange drivers. Selectable tweeter impedance (4-Ohm or 8-Ohm) and tweeter attenuation (0dB, -3dB, -6dB) allow the system's tweeter level to be adjusted relative to the midrange output accommodating different installation positions and sensitivity matching requirements. Rated at 125W RMS (250W peak), the PP4-X matches the power handling of the Punch Pro midrange driver. Sold as an individual unit.
Key Specifications
- Part type: Passive crossover
- Compatible with: Rockford Fosgate Punch Pro 4-Ohm speakers only
- Power handling (RMS): 125W
- Power handling (peak): 250W
- Woofer impedance: 4-Ohm (required)
- Woofer outputs: 2 (dual — for two Punch Pro midrange drivers)
- Low-pass filter: 6dB/octave at 3kHz
- Tweeter high-pass: Provided by built-in PP4-T tweeter crossover (not in PP4-X)
- Tweeter impedance selector: 4-Ohm or 8-Ohm
- Tweeter attenuation selector: 0dB, -3dB, -6dB
- Mounting hardware: Included
- Sold as: Individual unit (not a pair)
- Dimensions: Not specified — confirm with Rockford Fosgate
- Weight: Not specified — confirm with Rockford Fosgate
- Warranty: Not specified — confirm with Rockford Fosgate
Features & Benefits
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3kHz 6dB/Octave Low-Pass Filter for Woofer Outputs — The PP4-X delivers a 6dB/octave low-pass filter at 3kHz to the woofer channel outputs — limiting the frequency content sent to the Punch Pro midrange drivers to below 3kHz. This protects the midrange driver from high-frequency content above its optimal operating range and works in conjunction with the built-in 6dB/octave high-pass in the PP4-T tweeter to create a complete 2-way crossover system.
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Dual Woofer Outputs — Two woofer output terminals allow a single PP4-X to drive two Punch Pro midrange drivers from one channel — a common SPL and competition front stage configuration where two 8" midrange drivers (such as the PPS4-8) are mounted per side for increased midrange output.
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Selectable Tweeter Impedance — 4-Ohm or 8-Ohm — A switch selects whether the tweeter output is configured for a 4-Ohm or 8-Ohm tweeter impedance — allowing the PP4-X to accommodate different Punch Pro tweeter configurations within the same system.
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Selectable Tweeter Attenuation — 0dB, -3dB, -6dB — Three attenuation levels allow the tweeter output to be adjusted relative to the midrange level — compensating for the sensitivity difference between the tweeter and midrange drivers or for installation positions where the tweeter is closer to the listening position and would otherwise sound too prominent.
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125W RMS / 250W Peak Power Handling — Matched to the power handling of the Punch Pro midrange driver range, the PP4-X safely handles 125W RMS — appropriate for use with the high-output amplifiers typical in SPL-oriented systems.
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Designed Exclusively for Punch Pro 4-Ohm Speakers — The PP4-X is not a universal passive crossover. It is engineered for the specific impedance and crossover topology of the Rockford Fosgate Punch Pro 4-Ohm speaker range — using the PP4-T tweeter's built-in 6dB/octave crossover as part of the complete system design. Using the PP4-X with non-Punch Pro or non-4-Ohm speakers will produce incorrect frequency division and impedance loading.
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Sold Individually — One PP4-X per purchase. For a stereo front stage installation, two PP4-X units are required — one per channel.
Technical Specs
| Specification |
Detail |
| Brand |
Rockford Fosgate |
| Part Number |
PP4-X |
| Series |
Punch Pro |
| Part Type |
Passive Crossover |
| Compatible With |
Rockford Fosgate Punch Pro 4-Ohm speakers only |
| Power Handling (RMS) |
125W ✓ |
| Power Handling (Peak) |
250W ✓ |
| Woofer Impedance |
4-Ohm (required) ✓ |
| Woofer Outputs |
2 (dual) ✓ |
| Low-Pass Filter |
6dB/Octave at 3kHz ✓ |
| Tweeter HP |
Via built-in PP4-T crossover (not in this unit) |
| Tweeter Impedance Select |
4-Ohm / 8-Ohm ✓ |
| Tweeter Attenuation |
0dB / -3dB / -6dB ✓ |
| Mounting Hardware |
Included ✓ |
| Sold As |
Individual Unit (not a pair) ✓ |
| Dimensions |
Not specified — confirm with Rockford Fosgate |
| Weight |
Not specified — confirm with Rockford Fosgate |
| Warranty |
Not specified — confirm with Rockford Fosgate |
Compatible With / Goes Well With
Designed exclusively for:
- Rockford Fosgate Punch Pro 4-Ohm midrange drivers (e.g. PPS4-8)
- Rockford Fosgate Punch Pro 4-Ohm tweeters with built-in 6dB/octave HP (e.g. PP4-T)
Pairs with:
- Rockford Fosgate PP4-T Punch Pro 1.5" tweeter (provides the HP crossover side)
- Rockford Fosgate PPS4-8 Punch Pro 8" midrange/midbass (one or two per woofer output)
- High-output amplifiers for SPL front stage use
Frequently Asked Questions
What does the PP4-X do and what does it not do?
The PP4-X provides the low-pass (woofer) side of a 2-way passive crossover system — filtering frequencies above 3kHz away from the midrange driver outputs. It does not provide a high-pass filter for the tweeter; the tweeter's high-pass filter is built into the Punch Pro tweeter unit. Both crossovers must be used together for the complete system to operate correctly.
Can I use the PP4-X with non-Rockford Fosgate speakers?
No. The PP4-X is specifically engineered for the Punch Pro 4-Ohm speaker topology and relies on the built-in crossover in the Punch Pro tweeter for the tweeter channel. It will not function correctly with other brand speakers or other Rockford Fosgate series.
What is the low-pass crossover frequency?
3kHz — confirmed. The PP4-X provides a 6dB/octave low-pass filter at 3kHz for the woofer outputs. Above 3kHz, the output to the midrange drivers rolls off at 6dB per octave.
Why are there two woofer outputs?
The dual woofer outputs allow a single PP4-X to drive two Punch Pro midrange drivers from one amplifier channel — a configuration used in high-SPL front stage builds where two midrange drivers are mounted per side for increased output. Each output is rated for a 4-Ohm load — confirm the total impedance configuration with Rockford Fosgate when using both outputs simultaneously.
What does the tweeter attenuation selector do?
The 0dB, -3dB, and -6dB settings reduce the output level to the tweeter relative to the midrange. This compensates for sensitivity differences between the tweeter and midrange driver, and for installation positions where the tweeter is closer to the listening position and would otherwise produce more prominent treble than intended. Set the attenuation level during system setup based on listening tests.
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