I hate to admit it (being a so-called audiophile), but the best sub amp I ever used was a QSC MX3000a. 1500 W/ch into 2 ohms. I tried a Krell KSA-150, Crown DC300A, Bryston 4B-NRB, but the QSC took complete control. At about $1000 new it was also a bargain. Find it at your local musician's supply.
what is the best sub amp.
i have used a krell kst 100 strapped mono for years running a jbl pro 4719 sub with two 18s in it. i have been very happy with this amp until i watched pearl harbor. the kst started to loose it's control over the sub. i found a crown macro reference and put it on the sub. the crown killed the little krell, and never lost control at all. my main question is would i be better of with this crown or getting a larger krell? thanks alot for everyones thoughts.