I'm not the least bit surprised that this amp has outdone your RF. And like dave said, even the old PPI art series were awesome amps. As far as your soundstream goes, I'm not really sure. I've owned 2 in the past and yes, the power was definately there, however I wasn't to pleased with the clarity of my mids; But I think that had mostly to do with the mids I was running at the time "I didn't like them". On the other hand, my subs sounded great. By the way they were soundstream spl 6.5's in the front and soundstream 5.25's in the back that I was talking about. I got them really cheap, so I decided to give them a shot, needless to say I wasn't pleased. I had a soundstream reference 300 "I think" running them. I had a refernce 700 running 3 JL 10 W6's."like I said, the subs sounded great".
