I have a really nice McIntosh THX subwoofer, model HT-2.
It's a monster subwoofer with 2 heavy-duty LD/HP 12" down-firing woofers. Just under 100 lbs., but surprisingly small visually. Put two plants on it and call it a day. It is a passive subwoofer - meaning it does NOT have an amplifier, and can't directly plug into a home theater receiver. I do have an amplifier that would work well with it - I can include it for an additional $120. It's an NHT A1 amplifier - it's an excellent amplifier although if you have an enormous room then you could consider more power. Definitely local pickup only! Photos aren't mine, but it looks the same.
Links:
http://www.roger-russell.com/speakers.htmSpecifications (from the above, which is the website of the designer of these speakers):
HT-2 Home Theater subwoofer.
Floor system has Two 12" LD/HPwoofers facing downward. THX approved. Black ash finish. Impedance: 4 ohms
Output: 88dB @1w/1m [91dB @ 2.83v]
Power rating: 600w
Size: 20-1/2"H, 30"W and 20"D
Weight: 90.5 lb.
Manufactured: 1993-.
Last retail price: $1,750,00 each
Manufactured 1994-.
Last retail price $1,000.00 each
