How do I connect a subwoofer to my speakers?

No...the correct way is to connect the sub via rca coaxial cable from your receiver. Usually, the sub has a built in amp.

got the scoop....

hook your sub to the speaker wire, run more wire to the Def Techs from the high pass output on the sub, assuming it has them.

this will make your sub the bass speakers for your Def Techs

if you want the subs as the .1 in a 5.1 system, you will have to hook them up to the sub out of your receiver/pre-amp

Audionut, if I get you right, two wires from sub Hi Out to the terminals on my DTs? That be the deal? That's what I had thought, but you're the first, If I'm hearing your right.
thanks

yes. think of it this way. the sub is just an extension of the speaker wire. signal in, signal out, just with the low frequencies filtered out. (high pass filter "passes" the highs) this should "bypass" your blown amps in the DT's. the sub amps in the DT's won't "see" any signal due to the high pass filter on the sub. just to reinforce this, if your sub has a selectable frequency switch, set that to match the DT's. if the DT's sub rolls off at, say 80 hrtz, set your sub for about 90 hrtz to cover the frequencies of the DT subs.

most subs have a L-R channel in-put/out-put. just make sure L goes to L DT and R to R DT and that the polarity (+ to + / - to -) is right on both the in-put/out-put of the sub and the DT's.

one question: are the Def Tech's not under warranty? you might try a call to them if if not. good companies will cover things long after the warranty expires. i know Martin Logan did when my cross-overs went bad in my Ascents. DT also might have some pointers for you if they wont cover it.

good luck