Hi hows it going everyone. I installed a crappy head deck in my car cause it came in a package deal which was a flip down HU tape player and a 6 disc changer ( wanting to keep the old school tape player). Anyhow it has wayyyy to much engine noise and distortion, and I know for a fact that it's the cheap stereo because the stock didn't do that. So after this much blah blah I have narrowed down to getting a new one between the Alpine CDM-9821 and the Kenwood KDC-325. I like the Kenwood cause it's flip down and comes w/ a remote. However, the Alpine has a bass engine and subwoofer control built in which I don't know much about. Does the bass engine matter, and can someone tell me what its function? Plus some feedback of sound quality and relibilty of both would be nice.