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Punch 300 Watt BRT Full-Range 4-Channel Amplifier PBR300X4

Punch 300 Watt BRT Full-Range 4-Channel Amplifier PBR300X4

The Punch PBR300X4 is a 300 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.

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The Rockford PBR300X4 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 300 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.

Looking for more options? Check out all of our motorsport amps here.

  • MOSFET output stage
  • 2/4 channel input switch
  • 12dB/octave Butterworth crossover
  • High level inputs
  • Ultra compact chassis
  • Variable 4-6 volt hi level DC offset voltage input turn-on control
  • 1 Year Warranty
CEA-2006 Compliant
CEA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's ...

Class BR
Class BR

Stores energy and dynamically boosts rail voltage to create power on demand.


MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs the output device life span.


DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and ...

Rockford Fosgate Avatar
Rockford Fosgate Avatar

These Avatars are a personal signature from the Rockford Fosgate team member who designed and engineered ...

Recommended Fuse
(not included)
50 A
Operating Voltage
9 - 16 VDC
Suggested Alternator
75 A
Input Sensitivity
150 mV - 11 V
Rated Power
(RMS Continuous Power)
75 Watts x 4 @ 4-Ohm
This amplifier is only capable of operation at 4-Ohm
Number of Channels
CEA-2006 Compliant
CEA-2006 Power Rating
75W x 4 @ 4Ω
≤1.0% THD+N
Crossover Controls
High-Pass: Selectable 80Hz
Low-Pass: Selectable 80Hz
All-Pass: No
Tone Controls
Signal Input
Input Switch: 2ch/4ch input switch
Hi-Level: Variable DC offset sensitivity
High-Level: harness
Low-Level: 2 Pair RCA
Power Input Connector
Detachable Compression Terminal
Speaker Output Connector
Front Channels: 4-Pin Harness
Rear Channels: 4-Pin Harness
Speaker Wire Gauge
16 AWG
Remote Controls
Visual Indicators
Power, Protect, Boost
Circuit Topology Class
Class BR
Frequency Response
20Hz - 20kHz +/-1dB
Dynamic Power
84 Watts x 4 @ 4-Ohm
This amplifier is only capable of operation at 4-Ohm
Efficiency (average)
55% @ 4-Ohm
Total Harmonic Distortion (THD+Noise)
4-Ohm: <1.0%
Average Current Draw (13.8V Music)
20 A
Max. Current Draw (13.8V Sinewave)
40 A
Signal Output
Power Wire Gauge
10 AWG
Heat Sink Type
Extruded aluminum
Dimensions (H x W x D)
1.53 x 4.25 x 6.75 (in.)
3.88 x 10.79 x 17.14 (cm)
Shipping Weight
3.038 Lbs. (1.37 Kg.)
Total Power
(Sum of Rated Power)
300 Watts
Dimensional Diagram
Signal-to-Noise (CEA)
>90 dB
Channel Separation
>60 dB
Common Mode Rejection
>60 dB
Damping Factor

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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