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Delivers crisp, high‑fidelity sound with more power than its ratings and a straightforward install. Worth tuning carefully to avoid clipping or overpowering speakers.
Buyer confidence
86%Highlights
- 1 Year Warranty
- Muted turn on
- High level input capable with Auto Turn-On circuit
- Features C.L.E.A.N. Set-up
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 82 Watts x 4 @ 4-Ohm 137 Watts x 4 @ 2-Ohm 266 Watts x 2 @ 4-Ohm Bridged
- Bridgeable
- Yes
- Frequency Response
- 20Hz to 20kHz +/- 1.0dB
- Input Sensitivity
- 150 mV - 12 V
- Circuit Topology Class
- Class A/B
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 82 Watts x 4 @ 4-Ohm 137 Watts x 4 @ 2-Ohm 266 Watts x 2 @ 4-Ohm Bridged
Highlights
Overview- 1 Year Warranty
- Muted turn on
- High level input capable with Auto Turn-On circuit
Review highlights
Based on customer reviewsPunch P400X4 — clean, high‑output 4‑channel amp
Delivers crisp, high‑fidelity sound with more power than its ratings and a straightforward install. Worth tuning carefully to avoid clipping or overpowering speakers.
What buyers praise
- Crisp, detailed sound praised across multiple setups
- Generous power/headroom — several users report output above rated watts
What to watch for
- High output can overpower speakers or subwoofers—size components and set gains accordingly
Overview
The Punch P400X4 is a 4-channel car amplifier that provides 100 watts into each channel at 2 ohms. It’s designed for use in 4-way full-range systems or 3-way systems that use the front channels for the main stage and the rear channels for subwoofers.
Best for
- 4-way full-range front/rear speaker systems
- 3-way systems with front-stage components and rear subwoofers
- Applications needing a compact, multi-channel amp with balanced inputs
Key points
- 4 channels
- 100 Watts RMS per channel into 2 Ohms
- Designed for front-stage and rear subwoofer configurations
- Technologies: CTA-2006 Compliant, TRANS•ana, C.L.E.A.N. Technology, Balanced Differential Inputs, DTM, MEHSA3, CE Compliant
- Engineered in the USA
Fit and use
Use the front channels for component or full-range speakers and the rear channels for subwoofers in a 3-way layout, or deploy all four channels for a 4-way full-range system. The amplifier’s balanced differential inputs support common-source noise rejection in installations that can use them.
What to know
Power ratings quoted are 100W per channel at a 2-ohm load. For full specifications, configuration options and safety or wiring details, refer to the product documentation and owner’s manual. The amplifier incorporates several Rockford Fosgate technologies and is CTA-2006 and CE compliant.
Highlights
Key features
- 1 Year Warranty
- Muted turn on
- High level input capable with Auto Turn-On circuit
- Features C.L.E.A.N. Set-up
- Cast aluminum heatsink
- On-board Punch EQ with +18dB boost @ 45Hz
- Over current protection
- Short circuit protection
- 12dB/octave Butterworth crossover
- Stealth top mounted control panel
- CTA-2006 Compliant
- TRANS•ana
More info
Manufacturer details
The Punch P400X4 is a 4-channel amplifier producing 100 Watts into all four channels at 2-Ohm. The P400X4 is perfect for a 4-way full-range system or a 3-way system having a front stage with subwoofers on the rear channels.
Additional details
The P400X4 is perfect for 4-way front-stage/rear-fill or 3-way front-stage/subwoofer systems. Simply drop a pair of component speakers on the front channels and subs on the rear and BOOM - you got "The PUNCH." With its flexible design, the P400X4 is an excellent amplifier choice for virtually any vehicle.
Technologies
CTA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your
TRANS•ana
An award winning studio quality circuit borrowed from the pro audio company Hafler. TRANS-ana is a sound quality
Patent: 8,712,066
C.L.E.A.N. Technology
Time and sophisticated test equipment have been replaced, with Rockford’s integrated level setting technology
Balanced Differential Inputs
Differential input circuitry measures the voltage of both the (+) and (-) input signal. The circuitry subtracts
Engineered In The USA
[av• uh•tahr -noun] 1. an embodiment or personification, as of a principle, attitude, or view of life 2. a
DTM
Our engineers at Rockford Fosgate have developed an award winning cooling design called DTM (Dynamic Thermal
MEHSA3
MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs the output device life
CE Compliant
This product fulfills all essential safety and environmental requirements as defined in the European Directives
DSM
DSM - An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance
Showing the main technologies for this product.
Specs
Specifications
28
| Number of Channels | 4 |
| Total Power (Sum of Rated Power) | 400 Watts |
| Rated Power (RMS Continuous Power) | 50 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged |
| Dynamic Power (PVC/PowerCube®) | 82 Watts x 4 @ 4-Ohm 137 Watts x 4 @ 2-Ohm 266 Watts x 2 @ 4-Ohm Bridged |
| Bridgeable | Yes |
| Frequency Response | 20Hz to 20kHz +/- 1.0dB |
| Input Sensitivity | 150 mV - 12 V |
| Circuit Topology Class | Class A/B |
| Efficiency (average) | 67% @ 4-Ohm |
| Total Harmonic Distortion (THD+Noise) | 4-Ohm: <1.0% 2-Ohm: <1.0% |
| Signal Input | Hi/Low level: 2 RCA pair |
| Signal Output | - |
| Tone Controls | Front Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or Front Punch EQ2 Treble: 0dB to +12dB @ 12.5kHz Rear Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or Rear Punch EQ2 Treble: 0dB to +12dB @ 12.5kHz Function depends upon LP/AP/HP switch position |
| Crossover Controls | Front High-Pass/Low-Pass (HP/LP): 50Hz-250Hz @ 12dB/octave Butterworth Rear High-Pass/Low-Pass (HP/LP): 50Hz-250Hz @ 12dB/octave Butterworth All-Pass: Yes |
| Remote Controls | - |
| Visual Indicators | Power/Protect/Thermal LED Input Clip LED3 Output Clip LED1,2,3 LED Color Legend: 1BLUE: <0.5% THD 2VIOLET: 1% THD 3RED: 10%+ THD |
| Power Wire Gauge | 8 AWG to 4 AWG |
| Power Input Connector | Captive C-Clamp |
| Speaker Wire Gauge | 8 AWG to 18 AWG |
| Speaker Output Connector | Captive C-Clamp |
| Cooling | Convection |
| Operating Voltage | 9 - 16 VDC |
| Recommended Fuse (not included) | 60 A |
| Average Current Draw (13.8V Music) | 30 A |
| Max. Current Draw (13.8V Sinewave) | 60 A |
| Suggested Alternator | 75 A |
| Dimensions (H x W x D) | 2.38 x 7.76 x 11.03 (in) 6.05 x 19.71 x 28.02 (cm) |
| Shipping Weight | 10.8 Lbs. (4.89 Kg.) |
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Installation resources
Wiring diagrams
10
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
Popular Questions
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