300 Watt BRT Full-Range 4-Channel Amplifier

The Punch PBR300X4 is a 300 Watt full-range amp designed for compact systems. This efficient amp packs a Punch in motorcycles, ATVs and hybrid-electric vehicles without sucking a lot of juice from your electrical system.

  • 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 Standard Warranty warranty info
  • Get a 1 Year Extended Warranty extended warranty info
USD 279.99
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The 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.
CEA-2006 Compliant

CEA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These...
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Stores energy and dynamically boosts rail voltage to create power on demand.
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MEHSA3 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs...
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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
75W x 4 @ 4Ω
≤1.0% THD+N
Number of Channels: 4
Rated Power
(RMS Continuous Power):
75 Watts x 4 @ 4-Ohm
This amplifier is only capable of operation at 4-Ohm
Total Power
(Sum of Rated Power):
300 Watts
Dynamic Power
84 Watts x 4 @ 4-Ohm
This amplifier is only capable of operation at 4-Ohm
Bridgeable: No
Frequency Response: 20Hz - 20kHz +/-1dB
Efficiency (average): 55% @ 4-Ohm
Total Harmonic Distortion (THD+Noise): 4-Ohm: <1.0%
Crossover Controls: High-Pass: Selectable 80Hz
Low-Pass: Selectable 80Hz
All-Pass: No
Tone Controls: -
Input Sensitivity: 150 mV - 11 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: 10 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-BR
Operating Voltage: 9 - 16 VDC
Recommended Fuse
(not included):
50 A
Max. Current Draw (13.8V Sinewave): 40 A
Average Current Draw (13.8V Music): 20 A
Suggested Alternator: 75 A
Shipping Weight: 3.038 Lbs. (1.37 Kg.)
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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Rockford FosgateWoofer WiringWizard

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 (4Ώ)
red (8Ώ)
Negative -
black post
no dot
no dot


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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USD 30.99


10 AWG Power & Signal Installation Kit
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