Bi-amping with no pre-outs

Marakanetz...I don't know what you mean by the power amp being "disconnected". Of course it is until you feed a signal back in.

Dcconners...If you just want a full range signal to feed into a subwoofer amp that has its own low pass filter, a tap of the signal (without disconnecting it from the power amp) would be even easier that what I suggested. However, this would leave the receiver's power amp, and associated speakers, running full range, which doesn't really gain the full benefit of biamping. Also, most subwoofer "plate" amps have provision to input a speaker level signal. If you went that way no changes would be needed to the receiver.

Just put a "Y" cable on the sub out and send the signal to the left and right amp inputs then connect the subs. You will be using the crossover in the receiver.

Maybe I'm missing something. If he wants to bi amp why not use a Y cable on the pre out to split the signal to the second amp. Assuming he is drivng the top or bottom of a full range speaker this is a no brainer. If however he wants to drive a second sub then just put the Y on the sub out. In any event get a good Y cable or jumber. I biamp my home theater coming out of a lexicon with no degradation. Hope this helps.

Walkelin

09-30-04: Walkelin: "Maybe I'm missing something. If he wants to bi amp why not use a Y cable on the pre out to split the signal to the second amp."

You missed: "but my receiver has no pre-amp outs."