I'm going to be getting brand new speakers pretty soon for my HT pretty soon. my two front right and left are going to be Polk's RTi8's. I had read a thread about how connecting an amp to them improved the sound. I'm want to try it out. Now I don't think it was a preamp he used because wouldn't that have to be an amp that powered the signal before it go the my reciever? or if it's like a car stereo amp. but then i thought that maybe that's not a good idea because you can't go from the posts on the back of the reciever to another amp. Also maybe you send the signal straight from the source to the car stereo type amp. but then that wouldn't allow the reciever to decode any signals if it needed to. I checked out the primer on biamping and i got more confused. TIA.