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Rockford Fosgate P400X4 Punch 400 Watt 4 Channel Amplifier

4.7 4.7 out of 5 stars 507 ratings

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Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
P400X4
Standard Packaging

Purchase options and add-ons

  • The Punch P400X4 is a 400 watt 4-channel amplifier (2.38” x 7.76” x 11.03”) is perfect for a 4-way full-range system or a 3-way system having a front stage with subwoofers on the rear channels
  • Versatile multi-channel design is a perfect choice for virtually any vehicle (RMS Power Output: 50 Watts x 4 @ 4-Ohm OR 100 Watts x 4 @ 2-Ohm OR 200 Watts x 2 @ 4-Ohm Bridged)
  • RCA inputs can accept both Hi and Low level audio signals without the need of a signal converter
  • Featuring Class A/B topology, RCA pass-thru outputs, on-board Punch EQ with +18dB boost @ 45Hz, variable 12 dB/Oct Butterworth crossovers, and C.L.E.A.N. Set-up
  • Famous Rockford Fosgate build quality with a full 1-year warranty
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Rockford Fosgate P400X4 Punch 400 Watt 4 Channel Amplifier
Rockford Fosgate P400X4 Punch 400 Watt 4 Channel Amplifier
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Price$339.99$249.99-40% $139.00
List:$229.99
$149.00
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Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Sound quality
4.5
4.1
4.7
4.7
Easy to install
4.5
4.5
4.5
4.6
Value for money
4.3
3.8
4.3
4.6
Sold By
Rockford Fosgate
Rockford Fosgate
STINGER
STINGER

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here [PDF ]

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Rockford Fosgate P400X4 Punch 400 Watt 4 Channel Amplifier


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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 5.8 x 12 x 17 inches; 6.94 Pounds
  • Item model number ‏ : ‎ P400X4
  • Batteries ‏ : ‎ 1 12V batteries required.
  • Date First Available ‏ : ‎ March 11, 2013
  • Manufacturer ‏ : ‎ Rockford Fosgate
  • ASIN ‏ : ‎ B00BF6HZ6K
  • Customer Reviews:
    4.7 4.7 out of 5 stars 507 ratings

Product guides and documents


Product Description

subwoofer amplifier mono amp

System Versatility & Unmatched Performance

P400X4

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.

The stealth top mounted control panel not only provides a sleek finished look to the amp, but it also protects the vital controls.

Our custom heat sink design uses high aluminum mass where it is needed most to maximize heat transfer from the output MOSFETS to the surrounding air, keeping the circuitry cool even under high power and output demand.

  • Punch 400-Watt Full-Range 4-Channel Amplifier
  • Rated Power: 50 Watts x 4 @ 4-Ohm OR 100 Watts x 4 @ 2-Ohm OR 200 Watts x 2 @ 4-Ohm Bridged
  • 12dB/octave Butterworth crossover
  • Power Wire Gauge: 8 AWG to 4 AWG
  • Speaker Wire Gauge: 8 AWG to 18 AWG
  • Recommended Fuse (not included): 60 A
  • Dimensions (H x W x D): 2.38" x 7.76" x 11.03"
clean amp

C.L.E.A.N. Set-Up

C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) is our patented circuit with in/out clip LEDs to help match a source to amp and optimize output

subwoofer amp 1 channel amp

Punch EQ

Delivers more bass where you want it most by allowing up to 18dB of boost adjustment at 45Hz

woofer power amp

Multi-Signal Inputs

The RCA inputs of this amp can accept both Hi or Low level audio signals without the need of a signal converter

4 channel amp 4 channel car truck amplifier 5 channel stereo and sub amp
P600X4 P400X4 P1000X5
Customer Reviews
4.7 out of 5 stars
507
4.7 out of 5 stars
507
4.6 out of 5 stars
236
Number of Channels 4 4 5
Total Power (RMS) 600 400 1000
Bridgeable Yes Yes Yes (front/rear channels)
Circuit Topology Class Class A/B Class A/B Class A/B + Class BD (Sub)
Cooling Convection Convection Convection
Recommended Fuse (not included) 100 A 60 A 150 A
Dimensions (H x W x D) 2.38" x 7.76" x 13.28" 2.38" x 7.76" x 11.03" 2.38" x 7.76" x 15.03"
Rated Power 75 Watts x 4 @ 4-Ohm 50 Watts x 4 @ 4-Ohm 75 Watts x 4 + 150 Watts x 1 @ 4-Ohm
(or) 150 Watts x 4 @ 2-Ohm 100 Watts x 4 @ 2-Ohm 125 Watts x 4 + 300 Watts x 1 @ 2-Ohm
(or) 300 Watts x 2 @ 4-Ohm Bridged 200 Watts x 2 @ 4-Ohm Bridged N/A + 500 Watts @ 1-Ohm
high power sub amp 1 channel amp mono amp sub amplifier mono amp 2 channel stereo amp 2 channel stereo amp 2 channel stereo amp
P1000X1bd P500X1BD P300X1 P1000X2 P500X2 P300X2
Customer Reviews
4.7 out of 5 stars
319
4.8 out of 5 stars
177
4.5 out of 5 stars
149
4.4 out of 5 stars
361
4.4 out of 5 stars
361
4.4 out of 5 stars
361
Number of Channels 1 1 1 2 2 2
Total Power (RMS) 1000 500 300 1000 500 300
Bridgeable No No No Yes Yes Yes
Circuit Topology Class Class BD Class BD Class A/B Class A/B Class A/B Class A/B
Cooling Convection Convection Convection Convection Convection Convection
Recommended Fuse (not included) 140 A 80 A 50 A 140 A 80 A 50 A
Dimensions (H x W x D) 2.38" x 7.76" x 13.28" 2.38" x 7.76" x 11.03" 2.38" x 7.76" x 9.86" 2.38" x 7.76" x 15.03" 2.38" x 7.76" x 13.28" 2.38" x 7.76" x 9.86"
Rated Power 300 Watts x 1 @ 4-Ohm 150 Watts x 1 @ 4-Ohm 200 Watts x 1 @ 4-Ohm 300 Watts x 2 @ 4-Ohm 150 Watts x 2 @ 4-Ohm 100 Watts x 2 @ 4-Ohm
(or) 500 Watts x 1 @ 2-Ohm 300 Watts x 1 @ 2-Ohm 300 Watts x 1 @ 2-Ohm 500 Watts x 2 @ 2-Ohm 250 Watts x 2 @ 2-Ohm 150 Watts x 2 @ 2-Ohm
(or) 1000 Watts x 1 @ 1-Ohm 500 Watts x 1 @ 1-Ohm 1000 Watts x 1 @ 4-Ohm Bridged 500 Watts x 1 @ 4-Ohm Bridged 300 Watts x 1 @ 4-Ohm Bridged

From the brand

Important information

Legal Disclaimer

Full 1-year manufacturer warranty when purchased from an authorized Rockford Fosgate reseller

Looking for specific info?

Customer reviews

4.7 out of 5 stars
4.7 out of 5
507 global ratings

Customers say

Customers like the clarity, versatility, and sound quality of the electronic component amplifier. They mention that the MIDS/HIGHS are very clear and crisp sounding, and the imaging and soundstage is all there. They also appreciate the appearance, saying it looks fantastic and is really nicely done. Customers also find the instructions easy to understand and the amp is very easy to set up and operate.

AI-generated from the text of customer reviews

90 customers mention78 positive12 negative

Customers like the quality of the amplifier. They say it's a great amp that runs all their high end speakers nice and clean. Some say it produces a good amount of power and is the best 4 channel amp they've ever owned. Overall, customers are satisfied with the quality and performance of this product.

"...but the balance and quality of vocals, instruments and highs is really good for the money. Imaging and soundstage, it's all there...." Read more

"This is a great amplifier and I've had mine since 2018. You can tune it to the way you want and to prevent clipping it has a nice led indicator...." Read more

"...It's driving (4) Alpine 6 x 9 speakers, model 6912m. More than enough power. This amp gets just as loud as the 100w Alpine...." Read more

"PUNCH p600.4 is a good amp, it produces a good amount of power and its clean sounding , high SQ...." Read more

46 customers mention41 positive5 negative

Customers like the sound quality of the amplifier. They say it's spectacular, bright, and clean with no distortion. They also say it provides enough volume and quality that they need. Customers also say that it has good punch even at low volume and has a gray sound.

"...For most applications this will provide you with enough volume and quality that you need, unless you're trying to show off and it gets a little..." Read more

"...Perfect Boom... but not too much to interfere with the rest of the music, but it's really there. Boom...." Read more

"...technology and it appears it does a good job cause the sound is clear at high volume, my ears give out before the clear music does...." Read more

"Clean clear highs and punchy bass where it is needed. The amplifiers sound is very bright and clean with no distortion at all with the proper..." Read more

14 customers mention14 positive0 negative

Customers find the installation process of the electronic component amplifier to be easy. They mention that the instructions are easy to understand, making it simple to set up and operate the amp. They also say that the controls are easy and stellar to use. Customers also appreciate the clean setup feature, which ensures there is no clipping. Overall, customers are happy with the ease of installation and recommend the product to others.

"...Lots of tight bass from the 6.5 and 6x9's. Clear, clean, effortless and more volume than I can handle...." Read more

"...This amp was very easy to fine tune. Nice controls...." Read more

"...The receiver was a bit confusing to operate, but the instructions were easy to understand, and i NEVER read instructions...EVER!..." Read more

"...Also very very easy to install somewhere. I have a 2014 Impala the new model sounds awesome in my car." Read more

11 customers mention11 positive0 negative

Customers are satisfied with the appearance of the electronic component amplifier. They mention that it looks fantastic, has a small footprint, and is nicely done. They also appreciate the fit, finish, power, options, and specs.

"...I was surprised at the quality of construction, really nicely done. Things like that can tell you a lot about a company...." Read more

"...Very clean look and for being 1/2 the size of my other amp it weighs a lot more. Sounds just as good as my wife's jl 700/5 xd but a lot cheaper...." Read more

"...The amp is very high quality. It feels durable, tt looks fantastic, it has a small footprint, and it is very easy to set up...." Read more

"Love the look, gain controls and all that.. Problem is I have this amp pushing (4) 8'' RF woofers and I dont understand why in less than half..." Read more

8 customers mention8 positive0 negative

Customers are satisfied with the cleanliness of the electronic component amplifier. They mention that it has a powerful sound, and the set up is the best.

"...Lots of tight bass from the 6.5 and 6x9's. Clear, clean, effortless and more volume than I can handle...." Read more

"...door speakers and its loud, prolly hearing damage loud, but still clean and clear with no distortion...." Read more

"...The amplifiers sound is very bright and clean with no distortion at all with the proper speakers...." Read more

"Nice quality amp. Runs all my high end speakers nice and clean." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the clarity of the electronic component amplifier. They mention that the mids and highs are very clear and crisp sounding.

"...Imaging and soundstage, it's all there. I'll be buying another amp next year for the subs, and it'll be a Rockford Fosgate...." Read more

"...speakers and its loud, prolly hearing damage loud, but still clean and clear with no distortion...." Read more

"Clean clear highs and punchy bass where it is needed...." Read more

"...The BASS has a clear DEEP sound, the MIDS/HIGHS are very clear and crisp sounding...." Read more

5 customers mention5 positive0 negative

Customers like the controls of the electronic component amplifier. They mention that it has versatile controls, nice controls, and plenty of power. They also appreciate the feature set, options, and specs.

"...Anyway, the feature set is also quite good, and being able to double the wattage from 4 to 2 ohms is seriously impressive...." Read more

"...This amp was very easy to fine tune. Nice controls...." Read more

"2 or 4 channel selectivity. Versatile controls and plenty of power." Read more

"Love the look, gain controls and all that.. Problem is I have this amp pushing (4) 8'' RF woofers and I dont understand why in less than half..." Read more

4 customers mention4 positive0 negative

Customers like the compactness of the electronic component amplifier. They mention that it fits nicely under the driver's seat with a small piece of 3/4" plywood under it.

"...The P400x4 is compact and heavy. I was surprised at the quality of construction, really nicely done...." Read more

"...I have installed this on a 2014 Subaru Forester. It fits nicely under driver's seat with a small piece of 3/4" plywood under...." Read more

"...It feels durable, tt looks fantastic, it has a small footprint, and it is very easy to set up...." Read more

"Rockford Fosgate is and always has been a favorite of mine. Fit, finish, power, options and specs are all number one!" Read more

Amazing amp and can drive alot of speakers
5 Stars
Amazing amp and can drive alot of speakers
This is exactly what I have come to expect from Rockford Fosgate. I have this in a two amp system with batteries to both amps. Amazing amp and can drive alot of speakers. If you are planning on purchasing this amp, it is a must have in a large setup.
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Top reviews from the United States

Reviewed in the United States on October 8, 2015
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
4 people found this helpful
Report
Reviewed in the United States on November 19, 2021
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
2 people found this helpful
Report
Reviewed in the United States on May 30, 2014
Style: P600X4Product Packaging: Standard PackagingVerified Purchase
9 people found this helpful
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Reviewed in the United States on June 24, 2016
Style: P600X4Product Packaging: Standard PackagingVerified Purchase
3 people found this helpful
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Reviewed in the United States on April 26, 2015
Style: P600X4Product Packaging: Standard PackagingVerified Purchase
12 people found this helpful
Report
Reviewed in the United States on June 18, 2021
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
Reviewed in the United States on January 27, 2023
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
One person found this helpful
Report

Top reviews from other countries

Ron Holman
5.0 out of 5 stars Quality number 1
Reviewed in Canada on July 28, 2022
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
Bruno Lamarre
5.0 out of 5 stars Awesome deal (CDN 303$)
Reviewed in Canada on August 27, 2015
Style: P400X4Product Packaging: Standard PackagingVerified Purchase
2 people found this helpful
Report
neilmc
5.0 out of 5 stars Great!
Reviewed in Canada on February 19, 2019
Style: P600X4Product Packaging: Standard PackagingVerified Purchase