I recently purchased the Teac DR-L700 DVD receiver and two A-L700P Power Amps. I wish if possible to use the DR-L700 as a stereo pre-amp and bi-amp with the two A-L700P Power Amps. The DR-L700 has pre-out for all channels except front left and right channels. I've experimented using the fixed level tape out to feed the front chanels to the power amps (and used the volume controls on the A-L700Ps - is there an easy way to send the front channels to the rear pre-outs or to replace the speaker binding posts with front pre-outs so that the output level can be controlled ?