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Rockford Fosgate PBR300X4 Punch BRT 300-Watt Ultra Compact 4-Channel Amplifier Review

James Benchman
Last Updated on
by James Benchman

Large amps were simply something you just had to deal with not so long ago. These days, things are different. Advancement in technology has allowed manufacturers to shrink their amps to a point where space allocation is no longer an issue.

One of the companies who is spearheading this research is none other than the good old Rockford Fosgate.

They are known for making a lot of noise out of compact amps, but there is one model that is definitely pushing the limits. Rockford Fosgate PBR300X4 Punch BRT is the new definition of small in amplification language.

Sure, it’s not a kilowatt unit, but it doesn’t have to be in order to deliver value. Today we are going to give you a brief rundown of what you can expect from one of these tiny powerhouses and our own opinion on the whole concept.

  • Delivers great value for money
  • Small , compact , easy to install
  • Sends a lot of power to the woofer which results to loud and clear sound
  • No cons yet

Rockford Fosgate PBR300X4 Punch BRT Review

There is a number of legitimate reasons why someone would love to have a small compact amp that can easily be hidden away somewhere. Some users simply like the stealthy look, while others want to preserve space if possible.

No matter which reason you have, Rockford Fosgate PBR300X4 Punch BRT has you covered. As a matter of fact, this amp is so popular for its size that a good portion of its users are actually the motorcycle owners. That’s right, you can install one of these on a cruiser and have it fit just perfectly.

Features of the PBR 300 X 4 Punch BRT:

Rockford Fosgate is known for their amp’s performance, but they are also admired for their appealing design solutions. Rockford Fosgate PBR300X4 Punch BRT might be small, but it’s also pretty good looking.

The design is simple, effective and attractive at the same time. The main color of choice is black, but you also have red details to spice up the picture a little. On top of that, mounting brackets are polished aluminum. Overall, a pretty good looking amp.

Small size doesn’t mean fewer features, and this amp is a perfect example for that. Before we get into those, let’s go over the core specs. This is a four channel amp that delivers 75 Watts RMS per channel at 4 Ohms. Naturally, being limited at 4 Ohms is going to narrow down your choice of hardware, but that’s the trade-off for the smaller form factor.

In terms of frequency response, you are looking at a pretty standard 20 Hz to 20 kHz. There is a crossover available, and it comes with a low pass and all pass filters. Lastly, there’s a Punch EQ2 available as well.

All of the components on this amp are high-quality stuff. Anything from input blocks to mounting screws. The build quality is downright impressive, but that is exactly the type of thing you would expect from Rockford Fosgate. Especially since they are known for going above and beyond from time to time.

Small in Size, Not Performance:

We have given a lot of praise to this tiny amp, and all of that is completely warranted. The performance Rockford Fosgate PBR300X4 Punch BRT has to offer is impressive considering its size. The sound quality is great, although it’s not really something more conservative audiophiles would use in their main systems.

At 300 Watts RMS, it’s not going to be the loudest thing out there, but there’s still plenty of volume to be had. You can’t really put the Rockford Fosgate PBR300X4 Punch BRT against other amps within the same power band.

This model was specifically designed for applications where space is extremely limited but there is a need for four-channel amplification. In that context, Rockford Fosgate PBR300X4 Punch BRT is not only good, but it’s one of the few amps capable of delivering that type of performance.

Heat would be something to worry about, however, Fosgate’s MEHSA3 and NOMAD systems both work hard at keeping overheating from happening. Former is a very unique heat sync design, while the latter is an active digital overheating protection system. Combined, these two are quite efficient.

Our Verdict on this Rockford Fostgate PBR:

When you want more than the OEM hardware has to offer, but you are working with confined spaces, your options are extremely limited. Rockford Fosgate PBR300X4 Punch BRT is a rare model that not only works in this type of scenario, but it also brings a dose of finesse to the equations as well.

Sure, it has its flaws, but considering a number of features it offers and the type of performance it brings, you can’t really complain too much. It has also proven to be effective in scenarios it was not necessarily designed for, just ask any Harley owner who has one of these on their bike.

At the end of the day, PBR300X4 Punch BRT is a perfect example of what Rockford Fosgate is all about, and what their vision of automotive amplification looks like.

  • Delivers great value for money
  • Small , compact , easy to install
  • Sends a lot of power to the woofer which results to loud and clear sound
  • No cons yet

About James Benchman
James Benchman
James is an Automotive Mechanic with over 20 years experience and 300+ car repairs. He is an expert with cars and has worked with different models from the biggest brands. James is a Mechanic , Husband , Father of 3 , and head of content at Caraudiologic. Learn more about us
  1. I bought an after market fairing for my 2005 Road King with one of these PBR300X4 Punch BRT amps and I guess I thought that 300 watts was going to sound louder than it does. Either that or I am losing my hearing already or it was hooked up wrong in the factory I received the fairing from. There is two 6.5″ speakers in the fairing…

    Guess my question is then is 300 watts a lot or is it just sub par?

    1. Great question, Tony. Ultimately, I don’t know how it was installed and I’m hoping correctly. Check out Rockford’s detailed specs here: https://rockfordfosgate.com/products/details/pbr300x4/ This amp oeprates at 4-Ohms with 75 Watts per channel. You know, I don’t consider 75 Watts much at all. It comes down to your electronics, how well your speakers handle power, wiring, etc. But, no, I don’t think you’re losing your hearing, it could just be that this amp is not for you. This is a compact amp that does a nice job, but if you have the room, check out another larger amp that has more power for your needs. –James

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