PBR400X4D

Punch 400 Watt BRT Full-Range 4-Channel Amplifier

The Punch PBR400X4D is a 400 Watt full-range amp designed for compact systems. This efficient 4-channel amp packs a Punch in motorcycles, ATVs and hybrid-electric vehicles without sucking a lot of juice from your electrical system.

  • Full Range Class D
  • Differential inputs with high level auto turn-on feature
  • 8 AWG power/ground connector
  • Remote-Out feature when using high level inputs
  • C.L.E.A.N. input/output clip detection and indicator LEDs
  • Real time output and power supply thermal sensing
  • Extruded aluminum heatsink
  • Selectable Fixed 12dB/Octave Butterworth Crossovers
  • Muted turn on
  • Rockford Fosgate proprietary protection
  • Discrete surface mount technology
  • Compact design for stealth installations
  • CEA-2006 and CE/EMC compliant
  • 1 Year Standard Warranty warranty info
  • Get a 1 Year Extended Warranty extended warranty info
USD 249.99


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PBR400X4D

The Rockford PBR400X4D is a full-range 4-channel amplifier designed for stereo front/rear systems that requires little space. The BRT (Boosted Rail Technology) is an ultra efficient design that generates 400 Watts of power! The BRT also has a variable hi-level DC offset turn-on circuit for easy installation into any OEM system. Great for motorcycles and recreational vehicles.
Updated: 10/4/2017
CEA-2006 Compliant

CEA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These...
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Full-Range Class D

Full-Range Class D

A full-range version of the Class D topology which is a high efficiency amplifier design that...
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C.L.E.A.N. Set-Up

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

Patented circuit with in/out clip LEDs to help match a source to amp and optimize output.
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MEHSA<sup>3</sup>

MEHSA3

MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs...
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DSM

DSM

DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from...
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CEA-2006 Compliant: CEA-2006 Power Rating
50W x 4 @ 4Ω
≤1.0% THD+N
Number of Channels: 4
Rated Power
(RMS Continuous Power):
50 Watts x 4 @ 4-Ohm
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
Total Power
(Sum of Rated Power):
400 Watts
Dynamic Power
(PVC/PowerCube®):
75 Watts x 4 @ 4-Ohm
130 Watts x 4 @ 4-Ohm
270 Watts x 2 @ 4-Ohm Bridged
Bridgeable: Yes
Frequency Response: 20Hz - 20kHz +/-1dB
Efficiency (average): >75% @ 4-Ohm
Total Harmonic Distortion (THD+Noise): 4-Ohm: <1.0%
2-Ohm: <1.0%
Signal-to-Noise (CEA): >80 dB
Channel Separation: >50 dB
Common Mode Rejection: >55 dB
Damping Factor:
Crossover Controls: High-Pass: Selectable 60 Hz/80 Hz
Low-Pass: Selectable 80 Hz
All-Pass: Yes
Tone Controls:
Input Sensitivity: 150 mV - 12 V
Signal Input: Input Switch: 2ch/4ch input switch
Hi-Level: Variable DC offset sensitivity
High-Level: harness
Low-Level: 2 Pair RCA
Signal Output:
Power Input Connector: Detachable Compression Terminal
Power Wire Gauge: 8 AWG
Speaker Output Connector: Front Channels: 4-Pin Harness
Rear Channels: 4-Pin Harness
Speaker Wire Gauge: 16 AWG
Heat Sink Type: Extruded aluminum
Cooling: Convection
Remote Controls:
Visual Indicators: Power, Protect, Boost
Circuit Topology Class: Class D
Operating Voltage: 9 - 16 VDC
Recommended Fuse
(not included):
60 A
Fuse Rating: 60 A
Max. Current Draw (13.8V Sinewave): 50 A
Average Current Draw (13.8V Music): 15 A
Suggested Alternator: 75 A
Shipping Weight:
Dimensions (H x W x D): 1.53 x 4.25 x 6.75 (in.)
3.88 x 10.79 x 17.14 (cm)
Dimensional Diagram:

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Return Authorization

Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.

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Available Wiring Diagrams


Please consult your amplifier owner's manual for lowest recommended impedance.

Wiring Diagram #1


Wiring Diagram #2


Wiring Diagram #3


Wiring Diagram #4


Wiring Diagram #5


Wiring Diagram #6


Wiring Diagram #7


Wiring Diagram #8


Wiring Diagram #9


Wiring Diagram #10


Speaker Polarity
Your woofer may use one of the following to identify (+/-) terminals.
Positive +
Red Post
Purple (4Ω)
Red (8Ω)
Negative -
Black Post
No Dot
No Dot

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1-Year Extended Amplifier Warranty Icon
Get a 1-Year extended amplifier warranty when using a matching Rockford Fosgate installation kit. We want you to get the maximum performance and reliability from your Rockford Fosgate amplifier. We're so certain using the right cables make a difference, we'll give you and additional 1-Year amplifier warranty when using a matching installation kit!
Purchase a Rockford Fosgate Punch or Power amplifier.
Add the correct amplifier installation kit.
Get an additional 1 year amplifier warranty FREE!Download Instructions
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