how to hook up subwoofer?


Hi guys, this may be a atupid question here. There's an auction here in town today where all the stuff of a higher end audio store that closed is on sale.

I thought about getting a subwoofer if the price is right but wasn't sure how to hook it up on my 2-channel system since there's no dedicated output.

I've got a Musical Fidelity A308cr preamp and a pair of Electrocompaniet AW220 amps.

Any input would be greatly appreciated.

Thanks
krauti
"You can also connect the sub to the systems Tape monitor outs....." Always a bad idea.

Kal
Post removed 
Thanks guys for your help. The subs they had were mainly B&W ASW608's and most of them sold for about 350 to a little over 400. Considering that the auction house charges another 10% on top of it I figured it's not a bad deal but not the best either.

Settled for a demo Rotel RCD 1072 CD player for about 300 bucks since I don't have any half way decent player yet and will address the subwoofer issue later.

Might just breplace those B&W 703's with some PMC OB1's that I heard a while ago and liked a lot better.

Ok, Happy Turkey day