Rockford Fosgate PBR300X1 – Mono Block Amplifier


Rockford Fosgate Mono Block Amplifier
Sound In Motion, the Home of Rockford Fosgate on the Sunshine Coast.


Rockford Fosgate PBR300X1

Mono Block Amplifier


The Rockford Fosgate Punch PBR300X1 is a 300 Watt mono amplifier designed for compact subwoofer 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
  • 12dB/octave Butterworth crossover
  • High level inputs
  • Ultra compact chassis
  • Variable 4-6 volt hi level DC offset voltage input turn-on control
Rated Power
(RMS Continuous Power):
75 Watts x 1 @ 4-Ohm 
150 Watts x 1 @ 2-Ohm 
300 Watts x 1 @ 1-Ohm

The Rockford Fosgate PBR300X1 is a mono amplifier designed for a subwoofer system that requires little space. The BRT (Boosted Rail Technology) is an ultra efficient design that doesn’t even use a switching power supply to generate its 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.



Punch EQ2

U.S. Patent 3,883,832

Onboard equalizer with up to +18dB @ 45Hz and/or up to +12dB boost at 12kHz.

In the early 70’s, Jim Fosgate studied the acoustical properties of automobiles. Utilizing a real-time analyzer and pink noise, he would graph out the acoustical characteristics of each car he tested. Jim discovered three problems that were common to all cars:

  • A midbass hump between 100-275Hz
  • A steep roll-off of high frequencies from 2kHz up to 20kHz
  • Reduced bass response below 50Hz

The Punch EQ on-board equalization circuit helps correct for these acoustical deficiencies in the listening environment. When set to Low-Pass(LP) operation, it becomes a variable Bass Boost. When set to High-Pass (HP) operation, it acts as a variable Mid-Bass and Treble Boost. When set to All Pass (AP) operation, both Bass and Treble frequencies are boosted.


CEA-2006 Compliant

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




U.S. Patent US 8,212,620 B2

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

To achieve higher efficiency with lower distortion, Rockford Fosgate’s BR topology combines, cycle-by-cycle, an indirectly coupled high/low voltage rail linear topology. This combination yields an unsurpassed power density (watts per cubic inch).




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

MEHSA3 (Maximum Efficiency Heat Sink Application – gen. 3) is a proprietary process that yields up to five times better heat transfer than traditional FET mounting techniques, using the exact same components.

A multi-layer insulated metal substrate operating with minimal thermal resistance spreads heat both downward & outward to quickly dissipate heat from each device across the heatsink.

This process combined with our optimized heatsink designs, DSM (Discrete Surface Mount) technology and MOSFET devices, allows Rockford Fosgate to squeeze more watts per cubic inch from every output device as well as provide consistent thermal stability.

The 3rd generation creates a dielectric layer between the ceramic topside and the aluminum base that retains all of the electrical isolation and capacitive coupling of the original MEHSA material increasing it’s thermal conductivity.

The higher power handling results in a 20% reduction in thermal impedance.


Sound In Motion, your local Rockford Fosgate Stockists anf Installation Centres on the Sunshine Coast