I have an older (1970s era) M&K Goliath subwoofer that I would like to integrated into my HT. This was the very first of the M&K subs. It doesn't have an amp built in. It has regular Speaker wire connections. It does have a built-in passive x-over but I would like to bypass that and drive it directly with a 5.1 Receiver of some kind. Maybe a 100 watts. I'm shopping around and I just can't seem to find a relatively inexpensive Receiver that will drive a Sub under power of maybe a 100 watts. Does anyone have a direction to point me in? Or am I looking at buying a separate amp as these things all expect an amplified Sub???