Sub Amp Recommendation?

[awesomebase]

I've seen the amps at Parts Express, however I was wondering if there were others that were reasonably priced for power. I would like to find decent 400 or 500W amps without breaking the bank. I do want the amp to be "built-in" to the subwoofer box though, so I don't want just regular shelf amps. I would appreciate other resources and whether or not there are particular specs I should look for that relate to quality, reliability, or performance. Thanks!

 

[j_garcia]

I just picked up a 350W from these guys: http://www.rythmikaudio.com/nonservo_product.htm It's pretty solid. I was figuring it was going to be less than I needed, but it turned out to be more than I needed for a single 12" cylinder. I'm pretty impressed with it, especially for the price. The selling feature on this guy was the selectable subsonic filter at 14Hz, 20Hz and 28Hz. It also has a continuously variable phase, which may be of some use, but at zero, it's already fairly flat in my room.