Conclusion: This thing is a beast makes my Polk DB Tweeters scream! My Boston 5x7's and Pioneer 6x8's hit like subwoofers in my Mazda 3. I have the gains set at less than half. It's also built like a tank and is plenty loud. I had to do some tuning with the Crossovers and Punch EQ to get it to sound more natural. The power this thing has makes it very easy to pickup distortion as well as electrical noise. I had to re-route my RCA's to elimate the noise that this thing picked up.
Conclusion: This amp will push plenty of power to your speakers but I wouldn't use the punch series speakers with this amp because the mids drown everything out and distort a little sometimes. I had my hp set to 125 for front and 110 for my rear speakers, everything sounds really clear and edgy but not as full and smooth as I like, I just don't think the crossover gives you a convenient way to tune everything so I use pioneer speakers for extra bass and a smoother range of...
Conclusion: I have been running Fosgate amps since I first got into stereos in the early 1990s. I have owned about fourteen Fosgate amps and only had problems with two of them, one was my fault for overheating it because I had my sub box sitting on the amp and the other blew for unknown reasons but both were under warranty and replaced for only the cost of shipping to Fosgate. I have this 400.4 pushing four 6.5" Kicker marine co-axials in my pontoon boat.
Conclusion: Great amp very powerful I have it powering the infinity kappa component 6.5 and jvc 6x9s and they sound great with it turned only half way up and there more then loud enough with a Very clean crisp singnal being sent out I would definetly recommend this amp.
Conclusion: I have had Rockford amps in almost all of my vehicles since the late 80's and they have never let me down as far as sound quality and adjustability of levels. This new Punch 400x4 channel amp fills the bill quite well for those looking for a bit more power for under $300. Slim chassis design does not take up any space at all, it fit perfectly under my passenger seat with room to spare.
Conclusion: I wanted a quality amp that had the features I needed in a small package, ie, bass, treble, multi-channel.. I've always wanted a Rockford amp so I decided to go with this model. So far so good, It's living up to all my expectations..