Subwoofer Recommendation Please

[Charbear]

Hi all,

Old school guy slowly embracing the new millenia. I have an older stereo system which I really like and do not want to change (old Adcom 200W Amp and Tuner/Preamp combo unit). Finally replaced my old AR speakers with Infintiy Beta50's (fine considering $600/pr). Bi-wired configuration.

Mainly listen to blues/jazz and 70's - 90's rock (grew up on "hair" bands and still like 'em).

I'd greatly appreciate recommendations on a sub $400 subwoofer (good sale going on, etc.). The Adcom equipemnt is old (~20 years) and there is no "surround sound", subwoofer output, etc. I'll need to make sure I get a powered subwoofer with the "right connection scheme", right?

Thanks, in advance, for any advice/recommendations.