I own a 400 and this is a great little amp. Smells fine. I use this sucker till it shuts off all the time. Its loud on my seperates and mids. I can play the little guy for about a hour on total high and it does heat but shuts down but turn off the system and let cool back down and it turn back on when I juice the stereo back.It also has a noise reduction for any body putting high performance stuff on their car and dont want to hear that rev. noise.