AWESOME

I just bought this amp with infinity 4x6 and kenwood 6x9 5way speakers for my 04' grand am gt. Also runing 2 alpine 12'' type E's with sony xplod 800. unbelivible sound quality first didnt buy the amp and then decided to buy the amp as well. Made a huge difference from my factory amp. It is too loud cant run it at full power, when I do my ears hurt. I've let geek squad to install it for me they did an awesome and clean job. Million times better then audio express(got my alpine's from them with installation and regret it.) Will recommend to any one that loves sound quality to buy this amp. Will also recommend geek squad installation for perfect tune setup.

Solid Amp won't dissapoint

I have been using this amp for about 6 months now and I couldn't be happier. It has plenty of power to drive any speakers and the quality is great. It is slightly smaller compared to other 4 channel amps too so if space is an issue this may help a bit. It sounds great, has been reliable, and was fairly simple to install so overall I would definitely recommend it.

Awesome Amplifier

Just bought one of these a few days ago, installed it myself, and man does this thing SCREAM! I'm already pushing 2 10" Kicker CVR's (on a seperate amp) but now I have some Infinity 6x9's, I had to put these things facing away from me cause they would literally make my ears ring! Great buy! Do buy one if you want your car to be loud.

One amp system

I'm a die hard fan of 4 channel amplifiers. I've got the front channel hooked up to all four door speakers in my van with the high pass crossover protecting them from potentially damaging bass. The rear channel is bridged, uses the Fosgate's built-in low pass crossover, and is powering four 10" subs. This allows me to fade the sub in and out to adjust for songs with too much/little bass without affecting the bass balance w/in the music. Very pleased. Strongly recommend.

WOW!!!

I can't believe how well this amp performs. I bought it a month ago but couldn't install it until today...

I took a 1 1/2 hour car ride to the place that does the install. Let me just say that I didn't expect this kind of a difference... My 6 1/2" Alpine type S 2-way speakers were a perfect match, as far as rms goes. I used to turn my head unit volume up to about 21-26. It'd get pretty loud & then distort. But now, with the amp, I can only go to 14 or 15 until my ears hurt! The bass response is amazing, it truly sounds like I have a pair of 10's sitting in my trunk. I have no subs at all. And the clarity is still amazing.

Later, when I get subs installed I'm going to turn on the high pass filter. That way I can turn it up even more and totally destroy my eardrums :D hehe.

To sum it up, I was totally amazed by this amp. Waaay more than I expected. And, like all Rockford fosgate amps, my rms on my certificate was much higher than 50 watts per channel. I have  more

rockford fosgate P4004 4 channel amp.

this is a excellent amp. rockford test's every amp they sell and record the numbers then put them in the box with the amp. The P4004 is rated at 50 watts x 4 at 4 ohms, the one i recieved was shown to put out 93 watts x 4 at 4 ohms. this amp is extremely quiet, you hear nothing when in between songs. the P4004 is combined with an Alpine CDA 9885 reciever, a beautiful combo. the rockford really impressed me, I highly recomend it.

Wow..

Rockford's amp's never fail to impress me I have this amp power 4 Alpine Type R Component Speakers and it sounds wonderful this amp puts out plenty of power for just about any full range speaker on the market. My specific amp had a test sheet with 1357 watts max power, which is about a perfect match for the Alpine's with a 330w max power rating for each speaker. The only bad thing I can say about this amp is its shiny black finish attracts dust easily.