Rockford Fosgate Punch PBR300X1

300 Watts Punch Series Boosted Rail Compact Monoblock Amplifier

Product videos

• RMS 75W x 1 @ 4 ohms, 150W x 1 @ 2 ohms, 300W x 1 @ 1 ohm
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H

Learn more about the pbr300x1

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This item has been discontinued

Product Highlights

• RMS 75W x 1 @ 4 ohms, 150W x 1 @ 2 ohms, 300W x 1 @ 1 ohm
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H


Rockford Fosgate

Authorized dealer

PBR300X1- 300 Watt Amplifier with Boosted Rail Technology

To achieve higher efficiency with lower distortion, Rockford's BR topology combines, Cycle-by-Cycle, an indirectly coupled high/low voltage rail linear topology with a switched high/low voltage linear rail topology. This combination yields an unsurpassed power density (watts per cubic inch). In addition, this patented technology allows the chassis design to be much smaller than traditional sized amplifier - 1.53" x 4.25" x 6.75" - making this amp a great solution for smaller stealth installations, motorcycles and recreational vehicles. In fact, now, with the introduction of the Rockford Fosgate RFKHD9813, installing the PBR300X1 into select 1998 - 2013 Harley Davidson motorcycles has never been easier. With unparalleled technology, flexible installation options, and big power from such a small footprint Rockford Fosgate has ensured that everyone can put a little Punch in any system.

Punch EQ2 - Jim Fosgate's Brainchild

The Punch EQ on-board equalization circuit helps correct the acoustical deficiencies often found in car audio systems. These deficiencies were researched and graphed out by none other than Jim Fosgate himself. From that forward thinking approach, we now have the Punch EQ2. When accompanied by the Optional Remote Punch EQ, the user has full control of a variable bass boost centered at 45 Hz.


MEHSA³ - Max Efficiency Heat Sink Application

MEHSA3 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 allows Rockford Fosgate to squeeze more watts per cubic inch from every output device as well as provide consistent thermal stability. The higher power handling results in a 20% reduction in thermal impedance.

DSM - PBR300X1 Model Shown

DSM - Discrete Surface Mounted Components

An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance parts and large board traces. The discrete components are laser etched to meet a particular value and a very low tolerance. This lower tolerance improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature. These superior components are used by aerospace, automotive, and cellular manufacturers.





General Features:

  • Punch Series BR Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 1 chan.
    • 2 ohms: 150 watts x 1 chan.
    • 1 ohm: 300 watts x 1 chan.
  • Features Rockford Fosgate's Class-BR Topology
  • CEA-2006 compliant amplifier
  • Ultra compact chassis
  • MOSFET output stage
  • Boosted Rail amp technology
  • Convection cooling design
  • Extruded aluminum heat sink
  • Low level RCA input connection
  • High level speaker input connection
  • 12dB / Octave Butterworth crossover
  • Detachable Compression Terminals
  • LED power (blue) and protect (red) indicators
  • Variable 4-6 volt hi level DC offset voltage input turn-on control
  • Features MEHSA3 (Maximum Efficiency Heat Sink Application - gen. 3)
  • Perfect for smaller stealth installations
  • Great for motorcycles and recreational vehicles
  • Optional Remote Punch EQ provides 0dB to +18dB @ 45Hz
  • Wiring w/ Mounting Plate for Harley-Davidson Motorcycles Available: Rockford Fosgate RFKHD9813
  • 16 Gauge speaker wire output terminals
  • 10 gauge OFC power and ground wiring is recommended for installation.
  • 1-year Manufacturer's Warranty


Amplifier Specifications:

  • Input sensitivity:
    • Low level: 150mV - 4V
    • High level: 400mV - 11V
  • Operating voltage: 9 - 16 VDC
  • Recommended fuse rating: 30 A x 1
    (not included)
  • Max. current draw (13.8V Sinewave): 30 A
  • Average current draw (13.8V Music): 15 A
  • Frequency response: 20 - 250 Hz, +/- 3 dB
  • Total harmonic distortion: <1.0%
  • Signal to Noise Ratio: ≥105 dB
  • CMRR: >55 dB @ 1 kHz
  • Damping Factor: >200
  • Crossover controls: 35 - 250 Hz Low Pass @ 12dB/Octave
  • CEA-2006 Power Rating: 175W x 1 @ 4Ω ≤1.0% THD+N
  • Weight: 2.76 lbs
  • Dimensions: 6.75"L x 4.25"W x 1.53"H

Check out the Rockford Fosgate Punch PBR300X1 Owner's Manual

Check out the Class-BR Amplifier Installation Advisory From Rockford Fosgate

Specifications & Details

Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
75 watts x 1 channel
RMS Power @ 2 ohms
150 watts x 1 channel
RMS Power @ 1 ohm
300 watts x 1 channel
RMS Power @ .5 ohm
Power Specifications - Subwoofer Channel
Peak Power @ .5 ohm
Amplifier Specifications
Punch BR Series
Marine Certified
Amplifier Class
Number of Channels
1 - Mono
Total Peak Power Output
600 watts
Total RMS Power Output
300 watts
Maximum Input Gauge Size
10 AWG
Minimum Impedance Unbridged
1 ohms
Minimum Impedance Bridged
Not Bridgeable
Frequency Response
THD at Rated RMS Power
Speaker Level Inputs
Preamp Outputs
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
35 - 250 Hz
Signal-to-Noise Ratio
105 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fan Cooled
Fuse Rating
30A X 1 In-Line Fuse Recommended
CEA-2031 Compliant
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
Hi-Res Certified
Low-Level Input Sensitivity
High-Level Input Sensitivity
What is in the box?
User manual
WITB: Amplifiers
High-level input wiring harness w/ molex connector
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


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Product and How-to Videos

Customer Ratings & Reviews

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It's so small and powerful!

Okay, so get over the "That's what she said"-ish title, this amp fears no man! It is the size of my palm for crying out loud! The RF PBR300X1 is a fantastic amp for your system. Being that it is 1 ohm stable producing 300 watts RMS (my amp birthing sheet gave it a 327 RMS!), it matches the RF P3S-1X12 or P3S-1X10 to a tee! Being that I opted for the 12, I am more than satisfied. Do yourself a favor and get the RF PEQ bass knob and true 10 AWG OFC wire (like the Kicker DPK10, idea?) to power this little war-horse. So, what are you waiting for? PUT IT IN THE CART!

By Will on November 29, 2013


found this helpful.

Great for powering small factory subs

Ran it in an 2010 Honda Ridgeline. Replaced factory radio with double din and installed the amp behind the stereo. Powers factory sub great. An easy fix/upgrade when needing to run factory sub with aftermarket radio.

By Jon on July 16, 2014


found this helpful.

This little amp is a beast!

I have this hooked up to an RE Audio SRi 10" in a 1.5ft3 probox and this thing slams. You can hear it down the street. Birth sheet said 94 watts at 4ohms, 175 watts at 2ohms, 304 watts at 1ohm, and a max of 911 watts. I recommend getting the PEQ remote because there are no adjustments of the +18db punch eq other than from the optional remote. I can't wait for the release of the PBR300X4 to hook up my highs, just ordered a new set of power RF T1652 to go with my 525s.

By rollnbluntz on June 5, 2011


found this helpful.

Great amp! Great price! Fantastic seller!

Small, powerful, maintenance free and does not get stressed pushing the Rockford 1 ohm 10" slim design subwoofer. Great product

By Pjhernandez3 on September 16, 2013


found this helpful.

Little Giant Amp

I use Rockford Fosgate PBR300X1 for drive sub woofer box. It's very compact with high power. Enough for drive bass power. It's a good choice.

By Narong on February 23, 2012


found this helpful.

This amp rocks

I really like this amp alot. I have two of these in my car running two 2011 P3 12s. (One to each sub wired at 1ohm). These slam! I custom built a box to spec for the subs and no-one believes me that they are taking only 300 watts RMS each. People cant believe the power these little guys can push. They sound great and can fit in tight spaces. You would almost have to hear it to believe it, they did SO much better than I had expected. I also paired these with a PEQx3 and are run through a 360.2.

By Nate on October 8, 2011


found this helpful.

Rockford Fosgate Punch PBR300x1

I was planning on using only one Rockford punch amp in my Saturn Sky project. But after hooking everything up in the basement and seeing how well the Punch PBR 300x1 drove my sub-woofer. I decided to replace the new Kenwood amp I purchase with a second RockFord Punch PBR 300x2. I couldn't believe the difference this amp made on my door speakers. I would high recommend these amps, especially if you have minimal installation space.

By John on May 4, 2014


found this helpful.

Small Package Amp that Rocks

This amplifier has been fantastic. So much clean POWER from such a small package. Easy to mount, easy to hide, it's just a great piece of audio engineering. I would HIGHLY recommend this amplifier to anyone in need of a very solid amp, in a very small package.

By Soundmaven on January 16, 2012


found this helpful.


These little amps are fantastic! This is the first mono version 300x1. Running 2 10s in parallel for 2 ohm loaf. Amp only gets warm to the touch when run hard. So small it will hide in small spaces for a stealth installation. Also the PLC2 makes this amp even better, easy thump control for changing music.

By Paxton on April 14, 2018


found this helpful.

good amp for hybrid

Used in 2010 Prius. Seems to have plenty of power for the subwoofer, and does not draw much power at all. I really like that all the connections are removable. Great price on sale!

By A on August 3, 2020 checkmarkIcon Verified purchase


found this helpful.


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