Rockford Fosgate PBR300x1 "Boosted Rail" Mini Amp Review

[bigdwiz 10+ year member]

I picked up the PBR300x1 just a few days ago and couldn't wait to get it on my test bench and see how it performs.

The birthsheet stated over 300 watts at 1ohm RMS and over 900 watts peak! This amp is TINY....almost small enough to fit in my pocket. See an overview of the amp in addition to testing bass output from an array of subwoofers ranging from 8-12"

I had plans on making one video for the unboxing, overview, sub test and RMS wattage output test, but it was going to end up too long. I decided to break down the review into 2 parts. The first video includes the unboxing, overview and subwoofer test. I'll update this thread with the RMS wattage output I measure using my setup. I also have plans to test this amp out in my car to get an idea of how it works in a daily driver and will update and let everyone know how it performs in a modest setup.

Questions, comments and constructive criticism welcome...




Also, some beauty pics:

Click to read more...

 

[Timmothy Web 10+ year member]

u know what transistors are used in the power supply?

 

[bigdwiz 10+ year member]

u know what transistors are used in the power supply?

The output transistors are MOSFET. Steve Meade did a video at CES back in January 2011 and spoke w/ an RF engineer about how the amp works. Well worth a watch:

[video=youtube;z6M-itzlRJY]

 

[bigdwiz 10+ year member]

I've been questioned and should emphasize, I purchased this amp...It was NOT sent to me by Rockford or anyone else to review and send back. I purchased the amp from Car Toys through Amazon and my review is completely unbiased (well, other than my liking for the old school Rockford amps). I just wanted to make this clear so people didn't think I was doing a "favor" for someone by reviewing this amp....

 

[r0llinlacs 10+ year member]

I've heard the PBR300x4 on some Rockford mids/highs and I didn't like the way it sounded. Was kind of "scratchy", especially the highs. May have been the speakers, but I don't think so, I've heard them hooked up to a few different amps and sounded much better.

 

[bigdwiz 10+ year member]

I just updated the original post with the RMS power output (aka "clamped") test. I also show a closer view of all connections on the amp.