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The P400-4 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 P400-4 is an excellent amplifier choice for virtually any vehicle.
 | Rockford Fosgate Punch Series AmplificationFor over 25 years, Punch amplifiers have set the standard in the car audio amplifier industry and they continue to do so today. It's the reason that they have become the most popular amplifiers in the world. Each of the Punch family amplifiers reproduce sonic perfection along with impressive power in a compact chassis. |
 Perfect for 4-way front-stage/rear-fill or 3-way front-stage/subwoofer systems. Click to enlarge. |
 All connections are recessed into the amplifier's chassis and located on the bottom edge of the P400-4, for a clean, uncluttered install that looks great in any car. Click to enlarge. |
P400-4 Features
Features:
- 12dB/octave crossover
- 2/4 channel switch
- 4 Gauge power/ground terminals
- Audiophile grade speaker connections
- MOSFET output stage
- MOSFET power supply
- Top Mounted LED Indicators
CEA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.
Differential Inputs
Differential input circuitry measures the voltage of both the (+) and (-) input signal. The circuitry subtracts the voltage common to both conductors (noise) resulting in only the clean signal. This allows only clean signal to enter the amplifier.
DSM (Discrete Surface Mount)
DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.
Dynamic Thermal Management
Evenly distributes excess heat across entire amplifier heatsink.
MEHSA3
MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs the output device life span.
NOMAD
NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances.
Punch EQ2
Onboard equalizer with up to +18dB @ 35Hz and/or up to +12dB boost at 12kHz.
TO-247 MOSFETs
Rockford Fosgate amps use custom TO-247 MOSFETs. These have 60% more metal tab area for more power capacity, lower impedance and improved heat dissipation over traditional TO-220 MOSFETs found in competitor amps.
TRANS·ana
Trans·ana simplifies the signal path of the amplifier allowing the signal to travel through the amplifier at a lower voltage. The result is greater reliability and exceptional sound quality.
P400-4 Specifications
| Number of Channels: | 4 |
| Rated Power: | 50W x 4 @ 4-Ohms RMS 100W x 4 @ 2-Ohms RMS 200W x 2 @ 4-Ohms bridged RMS |
| Total Power: | 400 Watts |
| Dynamic Power: | Front Channels 86 Watts x 2 @ 4-Ohms 0 degrees Res 144 Watts x 2 @ 2-Ohms 0 degrees Res Rear Channels 85 Watts x 2 @ 4-Ohms 0 degrees Res 142 Watts x 2 @ 2-Ohms 0 degrees Res |
| Bridgeable: | Yes |
| Efficiency (average): | 71% @ 4-Ohm 70% @ 2-Ohm |
| Crossover Controls: | Front High-Pass (HP): 50-500Hz 24dB/octave Butterworth Front Low-Pass (LP): 50-500Hz 24dB/octave Butterworth Rear High-Pass (HP): 50-500Hz 24dB/octave Butterworth Rear Low-Pass (LP): 50-500Hz 24dB/octave Butterworth |
| Tone Controls: | Front Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or Front Punch EQ2 Treble: 0dB to +12dB @ 12kHz Rear Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or Rear Punch EQ2 Treble: 0dB to +12dB @ 12kHz Function depends upon LP/AP/HP switch position |
| Signal Input: | Low level: 2 RCA pair |
| Signal Output: | n/a |
| Power Input Connector: | Block |
| Power Wire Gauge: | 4 AWG |
| Speaker Output Connector: | Screw terminal barrier strip |
| Speaker Wire Gauge: | 8 AWG to 18 AWG |
| Heat Sink Type: | Cast aluminum |
| Cooling: | Convection |
| Remote Controls: | Optional PEQ Remote Punch EQ (overrides built-in Punch EQ2 for rear channels only) |
| Visual Indicators: | Power Thermal Protect |
| Circuit Topology Class: | Class A/B |
| Frequency Response: | 20Hz to 20kHz +/- 1dB |
| Shipping Weight: | 8.89 Lbs. (4.03 Kg.) |
| Dimensions (HxWxL): | 2.25 x 7.625 x 13.02 (in) 5.71 x 19.37 x 33.07 (cm) |
Thirty Years of Rockford Fosgate
Rockford Fosgate products have been designed and engineered in Tempe, Arizona since the beginning. Rockford's 30 year reputation is grounded in engineering and manufacturing some of the finest audio products in the world. The company's no-compromise approach has yielded patented iconic products such as the Punch EQ, Punch 45 amplifier and the 3Sixty integrated signal processor. Today, Rockford's new products push the performance envelope even further. Each new product is a step forward--they sound bigger, they play louder, and run longer. Rockford never settles for "good enough."The 2010 product line represents the company's core philosophy. Rockfords new amplifiers, speakers and subwoofers have raised the bar on the competition.
What's in the Box
Rockford Fosgate Punch P400-4 400-Watt Stereo Amplifier, User's ManualMore Amplifier Options From Rockford Fosgate
If you need more features, step up to the Power Series T400-4.On a Tighter Budget? Rockford's also got you covered. Consider the Prime Series R300-4.
Rockford Fosgate Punch Series Power Amplifiers
 |  |  |  |
| Rockford Fosgate Punch P200-2 200-Watt Stereo Amplifier | Rockford Fosgate Punch P300-1 300-Watt Mono Amplifer | Rockford Fosgate Punch P300-2 300-Watt Stereo Amplifer | Rockford Fosgate Punch P400-1 400 Watt Mono Amplifier |
 |  |  |  |
| Rockford Fosgate Punch P400-2 400-Watt Stereo Amplifier | Rockford Fosgate Punch P400-4 400-Watt Multi Channel Amplifer | Rockford Fosgate Punch P500-1BD 500-Watt Mono Amplifer | Rockford Fosgate Punch P500-2 500-Watt Stereo Amplifer |
 |  |  | |
| Rockford Fosgate Punch P500-4 500 Watt Multi Channel Amplifier | Rockford Fosgate Punch P700-1BD 700 Watt Mono Amplifier | Rockford Fosgate Punch P1000-1BD 1000-Watt Mono Amplifer |
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