I have an old school Rockford Fosgaste 50.1 cheater amp in chrome. These amps were made back in the day when power classes (for competition) were based off the manufacturer's power specs. While this amp is merely rated at 50RMS@4 ohms, it allowed the user to be entered into the lowest power class for competition. However, this amp was known to pump out over 300RMS@1 ohm and some even claim to have run them at .5 ohm with the amp pumping out between 400-500RMS. With two of these strapped together you could get over 1000RMS@1 ohm.

Now none of those power specs are impressive in today's car audio lineup, but they were good old amps. Today, the only amp with similar power ratings by Rockford is the Rockford Fosgate Punch PBR300X1, which retails around $250. Granted this newer amp has a variable crossover and a much smaller footprint.

In truth (and pretty much my opinion), this amp is best suited for powering a single DVC 2 ohm sub at 1 ohm. Given it's age, it's quickly becoming more of a nostalgic memento than anything, but it's still a fully functioning amp, and it's from back when Rockford was still American made and and stood for quality products, unlike their cheap Thailand made stuff today.

$65 FIRM for this piece of history.

Still has both covers w/ all the screws and the amp has but very minor blemishes, especially for it's age.

Please contact me via the in-site messaging system.

Edit.

Amp was sold, then returned merely a couple hours later due to the buyer being unable to get the amp to function properly. I wired it back up in my car for testing after getting it back and had no issues wirth it. I have uploaded a recent photo, taken at 7:16P.M on Thursday the 14th of March 2013. In the photo, I have the gain set to max, which is surely a clipped signal, showing 27.1VAC. I also have a photo of the amp producing 19VAC, which at 2 ohms would be approx. 180RMS. Both were with my master volume set to 3/4 full volume and my sub volume maxed. This shows the amp does in fact work. I had it wired, for testing, to a DVC 4 ohm 12" Polk sub. At approx. 200RMS/20VAC. The output, IMO, left me wanting more, but I'm used to feeding the sub 400RMS+. It was still enough to move my rearview mirror, although that is a poor means of measuring output. FYI, I had my music faded to the front 3.5" speakers in my car so only they and the sub were playing. My front speakers have an 800Hz bass blocker on them, so it was all the sub, not my rear 6x9s producing the low range.