Rockford Fosgate P400-4: main picture thumbnail Rockford Fosgate P400-4: alternate picture thumbnail Rockford Fosgate P400-4: alternate picture thumbnail

Rockford Fosgate Punch P400-4

400W RMS Punch Series Compact 4-Channel Amplifier

  • 4.8

(26 reviews)

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The product on this page is discontinued.

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Adam G. was incredibly helpful, kind, and expedient in helping me with my lost package. This is so important around Christmas time and I am very thankful.

- Kirby from Atlanta, GA

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General Features:

  • Punch Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 50 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • MOSFET power supply
  • Remote bass level input (remote level control sold separately)
  • LED power, thermal, and protect indicators
  • Tuned Bass EQ (0-18 dB bass boost at 45 Hz or 0-12 dB bass boost at 12 kHz depending on crossover selection)
  • On-board differential inputs eliminates noise picked up by the signal cable
  • 4/2 channel operation
  • Integrated Trans•ana technology 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.
  • Featured custom designed TO-247 MOSFETs have 60% more metal tab area providing more power handling capacity, lower impedance and improved heat dissipation over traditional TO-220 MOSFETs found in most competitor's amps.
  • Built in NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances.
  • Cast aluminum heatsink evenly distributes excess heat across entire amplifier heatsink
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable high-pass filter (50-500 Hz, 12 dB/octave)
  • Variable low-pass filter (50-500 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20000 Hz
  • Dimensions: 13.02"L x 7.625"W x 2.25"H
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • 1-year SonicElectronix.com warranty

Product History:

Rockford Fosgate P400-4 thumbnail
(newest, current model)
Rockford Fosgate P4004 thumbnail
(previous model, replaced by Rockford Fosgate Punch P400-4)
Power Specifications - Full Range Channels
RMS Power @ 4 ohms 50 watts x 4 channels
RMS Power @ 2 ohms 100 watts x 4 channels
Bridged RMS Power 200 watts x 2 channels
Amplifier Specifications
Amplifier Class AB
Number of Channels 4
Total RMS Power Output 400 watts
Maximum Input Gauge Size 4 AWG
Minimum Impedance Unbridged 2 ohms
Minimum Impedance Bridged 4 ohms
THD at Rated RMS Power 0.05%
Speaker Level Inputs No
Preamp Outputs No
Built-in Crossover Low-pass (LP)
High-pass (HP)
High-Pass Crossover Frequency 50 - 500 Hz
Low-Pass Crossover Frequency 50 - 500 Hz
Signal-to-Noise Ratio 85 dB
Bass Boost 0 - 18 dB
Bass/Gain Remote Optional (Accessory required and sold separately)
Fan Cooled No
Fuse Rating 80A x 1 
CEA-2006 Compliant Yes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Sonic Electronix
Customer Review Summary for Rockford Fosgate Punch P400-4
Average Customer Rating is 4.8 out of 5 stars:
  • 4.8
based on 26 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
77%
4 star:
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23%
3 star:
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0%
2 star:
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0%
1 star:
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0%
what's this?
Average Attributes Rating:
Durability
  • 4.8
4.8
Value
  • 4.7
4.7
Features
  • 4.5
4.5
Design
  • 4.7
4.7
Usability
  • 4.6
4.6
what's this?
Most Helpful Customer Reviews:
January 9, 2011 Rockford wins!!
4 of 4 people found the following review helpful:
Review by
Mod from CR,WA
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I have had Rockford amps in almost all of my vehicles since the late 80's and they have never let me down as far as sound quality and adjustability of levels. This new Punch 400x4 channel amp fills the bill quite well for those looking for a bit more power for under $300. Slim chassis design does not take up any space at all, it fit perfectly under my passenger seat with room to spare. It is running four door speakers on two channels and one 10" sub on the other two, and it hasn't even got warm at the highest levels.



Thank you Sonic for the excellent customer service and instant shipping.
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January 19, 2013 plenty of power to spare
Review by
Devin from Nashville, NC
Overall
  • 4.0
Durability
  • 5.0
Value
  • 4.0
Features
  • 4.0
Design
  • 5.0
Usability
  • 4.0
i have this installed in a 92 chevy camaro running infinity 4x6 plates in the front and kenwood 5-way 6x9s in the rear. it is plenty of power and it keeps them clean, just took a little while to get it tuned the way i like.
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September 4, 2012 Best Brand Ever!!!
Review by
Justin from Mangilao, Guam
Overall
  • 5.0
Durability
  • 4.0
Value
  • 5.0
Features
  • 5.0
Design
  • 4.0
Usability
  • 5.0
Ive recently installed this amplifier to power a set of Infinity Reference Series 5 1/4 components as well as Infinity Reference 6 x 9 2 way speakers and I am very satisfied with my purchase. This amplifier delivers clear, crisp, quality sound that i havent heard in a long time. Even after powering my speakers to the point where my ears have a slight ringing sound, theres still power to spare. I would recommend this brand of amps to any audio enthusiast. The look and design may not be as visually appealing as other amps on the market but then again its not the looks that give your speakers sound. The plastic cover gives it a feeling of being cheaply made. It has all the features an amp needs. And its really easy to use. Overall great product!!!
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July 3, 2012 Excellent
Review by
T-Mac from Texas
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 4.0
Usability
  • 4.0
This amp has been an excellent addition to my system. It puts out a ton of clean power. It puts out much more power than what it is initially rated at. I believe in Fosgate Amps! The only gripe I would mention, albeit a small one, is the fact that the gain and crossover settings are very tiny, plastic, and recessed into the amp. This makes it a bit of a pain to adjust settings but you get used to it after while. I have had no mechanical or sound issues with it. Overall, love it!!
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April 13, 2012 Power to spare SQ to be desired
Review by
808Mag from Kona, HI
Overall
  • 4.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 4.0
Design
  • 5.0
Usability
  • 4.0
This thing is a beast makes my Polk DB Tweeters scream! My Boston 5x7's and Pioneer 6x8's hit like subwoofers in my Mazda 3. I have the gains set at less than half.



It's also built like a tank and is plenty loud. I had to do some tuning with the Crossovers and Punch EQ to get it to sound more natural. The power this thing has makes it very easy to pickup distortion as well as electrical noise. I had to re-route my RCA's to elimate the noise that this thing picked up. I had a Kenwood 4ch amp before this one and it didnt pickup any noise with the wiring in the same place.



In conclusion I think this unit is a very good choice to go LOUD with decent Sound quality and compact size but there are other units that will sound as loud with bett SQ.
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View All 26 Reviews for Rockford Fosgate Punch P400-4
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Product Summary

Manufacturer: Rockford Fosgate
Model number: P400-4
UPC: 780687326883
Weight: 12.00 lbs
Internal SKU: p400-4
Internal product ID: 9893