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Rockford Fosgate Punch PBR400X4D

Compact 4-channel car amplifier — 50 watts RMS x 4

Item # 575PBR4004

Rockford Fosgate's incredibly small Punch PBR400X4D 4-channel amp will put out 50 watts RMS to each of your front...

Rockford Fosgate's incredibly small Punch PBR400X4D 4-channel amp will put out 50 watts RMS to each of your front...

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About the Rockford Fosgate Punch PBR400X4D

This lightweight packs a punch

Rockford Fosgate's incredibly small Punch PBR400X4D 4-channel amp will put out 50 watts RMS to each of your front and rear speakers, giving you the power to fill your listening space with great-sounding music. You can also run this amp in 2-channel mode to drive a couple of high-performance speakers or subs with up to 200 watts RMS each.

This lightweight packs a punch

Rockford Fosgate's incredibly small Punch PBR400X4D 4-channel amp will put out 50 watts RMS to each of your front and rear speakers, giving you the power to fill your listening space with great-sounding music. You can also run this amp in 2-channel mode to drive a couple of high-performance speakers or subs with up to 200 watts RMS each.

Boosted Rail (BR) amp technology

This Punch Class BR amplifier generates this power from a very tiny case — literally the size of your hand. Boosted Rail amp technology uses capacitors and high-speed circuitry to boost the amp's power supply voltage when needed, so it can handle musical peaks without missing a beat. Rockford Fosgate uses this new technology to create a remarkable amp that fits almost anywhere and delivers powerful sound.

Features that keep you rockin'

The amp also features speaker-level inputs with signal-sensing turn-on, allowing you to connect into almost any system without having to run a turn-on lead back to the receiver. An extruded aluminum heat sink combines with Rockford Fosgate's heat management technology to make sure your tunes keep rockin' — even when you're playing loud.

Easy to set for optimum performance

The PBR400X4D features Rockford Fosgate's C.L.E.A.N. technology (Calibrated Level Eliminates Audible Noise) — a setup system that ensures your music will sound as clean and powerful as possible. Just play the setup CD or a downloaded tone, adjust the receiver volume until a red clip light on the amp goes out, then turn the amp gain up until a blue light comes on. It's that simple. When your receiver reaches maximum clean volume, you'll get maximum clean power from your Punch amp. At quiet listening levels, you'll hear less background noise and more of your music.

Rockford Fosgate Punch PBR400XD

Punch PBR400X4D control panel

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Product highlights:

  • 4-channel car amplifier
  • 50 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 200 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
  • CTA-2006 compliant
  • Boosted Rail amp technology
  • C.L.E.A.N. gain setup system includes test tone CD
    • test tones also available as MP3 download (labeled "3sixty.3 setup disc") from Amazon On Demand, Rhapsody, Google Play, and Spotify
More Features:
  • switchable high-pass filters (off/60/80 Hz at 12 dB/octave) on front and rear channels
  • switchable low-pass filters (off/80 Hz at 12 dB/octave) on front and rear channels
  • preamp and speaker-level inputs
  • signal-sensing turn-on with speaker-level inputs eliminate need for remote turn-on lead
  • wiring, fuse, and hardware not included with amplifier
    • 8-gauge power and ground wires and a 60-amp fuse recommended
  • dimensions: 6-3/4"W x 1-9/16"H x 4-1/4"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # PBR400X4D

What's in the box:

  • 4-Channel amplifier
  • Two 15" high-level input harnesses
  • Two 8" speaker-level output harnesses
  • Setup disc (CD)
  • Amplifier Quick Setup
  • Certificate of Performance Verification sheet
  • Class-BR Amplifier Installation Advisory sheet

Customer reviews

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Rockford Fosgate Punch PBR400X4D reviews

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High Quality Tile Head Unit Ride

Jerry from SAN ANTONIO, TX on 9/5/2019

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The perfect amp for the thump i wanted on my drives to and from. With the size of this beast being more than convenient.

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Awesome Amp

Crutchfield customer from Jacksonville, NC on 5/7/2019

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Great Amp! Pushing all 4 of my 6 1/2 infinity kappas on my 2012 Ultra Classic

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Perfect for compact installs

Bobby from New Orleans, LA on 2/12/2019

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Great compact amp. I have it buried behind my headunit in my Kia Soul. I have a set of components in the front and a 3 way in the rear doors and they sound amazing. Perfect pairing for Rockford Fosgate punch door speakers. The "clean" setup let's you set the gains then forget about it. I added a powered sub to complete my system and I'm parking lot pimping.

Pros: Small. Large amounts of power.

Cons:

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Rockford Fosgate Punch PBR400X4D

Mark from Scottsburg, IN on 2/1/2019

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I have a full size pickup with a standard cab so I didn't need a mega size amp. This compact amp packs a punch in a small package. I'm very happy with the performance.

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Rockford Fosgate Punch PBR400X4D

matthew from Schertz, TX on 7/30/2018

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I have this P400 running my 3 way Fosgate door speakers. It handles itself very nicely for such a small package. It's small enough to bury under my head unit, making installation a breeze. Great purchase, I've never had any issues with RF products in the last 25 years or so. Highly recommend!

Pros: Size

Cons: None

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Rockford Fosgate Punch PBR400X4D

Crutchfield customer from Selma, TX on 7/29/2018

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Works great. Radio now sounds awesome. Also love that Crutchfield told me everything I would need to get the job done

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Rockford Fosgate Punch PBR400X4D

Crutchfield customer from Fort Sill, OK on 3/31/2018

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Nice and compact, but strong for its size. Really woke up the Rockford P1 6.5 components.

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Rockford Fosgate Punch PBR400X4D

Crutchfield customer from Montville, NJ on 1/7/2018

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Great sound in a compact amp. Easy install for the Jeep. Fit right under the steering column behind the knee panel. Easy connections with good documentation. Just perfect.

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Product Research

Features
Controls
Connections

Features

Boosted Rail Technology: The PBR400X4D full-range Class-D amplifier uses Boosted Rail Technology (BRT), an efficient design that doesn't use a switching power supply. The super-efficient PBR400X4D has an extruded aluminum heatsink to dissipate heat. Its compact design makes it ideal for motorcycles, ATVs, golf carts, and side-by-sides.

Differential Inputs: The PBR400X4D is compatible with either line-level (RCA) or speaker-level inputs. The included Molex-to-RCA harnesses are used in both cases. If you are not using RCA cables, you can cut off the RCA connections and solder the harnesses to speaker wires from the source unit.

Auto Turn-on/Remote Out: When using speaker-level inputs, the amp will automatically turn on when it senses an input signal (4 volt minimum). This is helpful when connecting the amp to a factory radio without a turn-on lead. In addition, when using speaker-level inputs, the remote terminal becomes an output, allowing you to daisy-chain the turn-on signal to another amplifier.

LEDs: The Power/Protect LED on the right side of the amp illuminates blue when the amp is turned on and operating normally. It illuminates red when one of the protection circuits has engaged (short circuit, impedance too low, or temperature too high). On the left side are three LEDs that glow red when clipping occurs on the input, left output, or right output. This C.L.E.A.N (Clipping Calibrated Level Eliminates Audible Noise) level-setting technology helps you to obtain the optimum input and output signals.

Controls

Crossover: The front and rear channels have independent Butterworth 12dB/Octave crossovers with separate 4-way switches. You can set the crossovers to Low-Pass (fixed at 80Hz), All-Pass (crossover bypassed), High-Pass (fixed at 60Hz), or High-Pass (fixed at 80Hz).

Gain: The front and rear channels also have independent input gain controls, adjustable from 150mV to 11V.

2CH/4CH Switch: You can connect four channels or two channels to the amplifier's input. The 2CH/4CH switch lets you select the number of channels connected to the amplifier. When 2CH is selected, all four channels receive the signal from the Ch1/Ch2 input.

Connections

Power Connections: The power, ground, and remote turn-on terminals are c-clamps on a removable plug. Each terminal will accommodate up to 8-gauge wire (Rockford recommends 8-gauge minimum for the power and ground wires). A flat blade screwdriver (not supplied) is required to tighten/loosen the terminals. There is no fuse on the body of the amp, so an external 60-amp fuse (not included) must be installed in the power wire. If a wiring kit is used that includes a different value fuse, the original should be replaced with a 60-amp fuse.

Signal Input: The included input harnesses have Molex plugs on one end (plugs into the amp) and female RCA plugs on the other. When using speaker-level inputs the RCA ends can be cut off and the four individual wires are used.

Speaker Output: The included speaker output harnesses have Molex plugs on one end (plugs into the amp) and tinned bare wires on the other.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
size ... compact and powerful [ SnowMonkey  Jul 03, 2018 ]
A
Had good luck with the Rockford Fosgate Punch 300. This one i expect to be even better. [ Tom  Dec 05, 2017 ]

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