[warnerwh]

Does anybody know of a sub amp with a high input impedance of say 40k ohms? Reason I ask is I use an Audio Research tube preamp and need to add a subwoofer.  
Another option: What if I bought an old Adcom preamp and used the tape outs of my preamp to the line in of the adcom to drive a sub amp? Any issues here? Thanks for the help!

[pauly]

The rhythmik sub is the highest  input R I've seen.
The 350se is the one I'm considering   30kohm


http://www.rythmikaudio.com/index.htm



Also check out these sites

http://www.oaudio.com/500W_SUBAMP.html


http://www.acoustic-visions.com/~acoustic/products/subwoofer_amplifiers/index.shtml



The hypex amps are nice but only have 10kohm


Paul

[warnerwh]

Pauly: thanks alot. That does appear to be a good sub amp. AB design and a good price at only 240 bucks shipped