Hello I'm new to Home Theatre so I hope this thread is not too dumb. I just purchased a 57" Toshiba TV and now I need to get more speakers, a Receiver...etc. I Have an old Acoustics Research Sub. The box hold 2 down firing drivers (to be replaced since the old ones are rotten). I'm wondering if it makes sense to replace the drivers and make it a passive sub, or add an internal amp and create a powered sub. If it is passive, would the sound I get from it be as good with power amp (separate) and speaker cables as it would if I were to get an active sub. I'm thinking of buying a separate amp, hooking it up to my receiver (not purchased yet) and powering the sub that way. From reading the forums so far, I gather that making a sub sound good is no easy task. I guess I'm just confused about how a surround sound receiver outputs its Sub signal. If I go into a separate amp will I end up having a delay when the sound is supposed to happen? OK, that should do for now. Any help would be appreciated, as would links to info I could read somewhere else. Thanks.