Rockford Fosgate Punch 300 Watt Brt Full-Range 4-Channel Amplifier - PBR300X4

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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.

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



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

CTA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.


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


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

Number of Channels4
Total Power (Sum of Rated Power)300 Watts
Rated Power (RMS Continuous Power)75 Watts x 4 @ 4-Ohm This amplifier is only capable of operation at 4-Ohm
Dynamic Power(PVC/PowerCube®)84 Watts x 4 @ 4-Ohm This amplifier is only capable of operation at 4-Ohm
Frequency Response20Hz - 20kHz +/-1dB
Input Sensitivity150 mV - 11 V
Circuit Topology ClassClass BR
Efficiency (average)55% @ 4-Ohm
Total Harmonic Distortion (THD+Noise)4-Ohm: <1.0%
Signal InputInput Switch: 2ch/4ch input switch , Hi-Level: Variable DC offset sensitivity , High-Level: harness , Low-Level: 2 Pair RCA
Signal Output-
Tone Controls-
Crossover ControlsHigh-Pass: Selectable 80Hz , Low-Pass: Selectable 80Hz , All-Pass: No
Remote Controls-
Visual IndicatorsPower, Protect, Boost
Power Wire Gauge10 AWG
Power Input ConnectorDetachable Compression Terminal
Speaker Wire Gauge16 AWG
Speaker Output ConnectorFront Channels: 4-Pin Harness , Rear Channels: 4-Pin Harness
Operating Voltage9 - 16 VDC
Recommended Fuse (not included)50 A
Average Current Draw (13.8V Music)20 A
Max. Current Draw (13.8V Sinewave)40 A
Suggested Alternator75 A
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 Weight3.038 Lbs. (1.37 Kg.)

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