I've just bought 4 Harmon Kardon PA2400 Power Amps second hand. Currently I have a Denon AV-A10SE & POA-T10 (4800 is US. Equiv. model). Prior to my purchase I was Bi-Amping using the receiver's internal amps for the high freq. with the matching POA-T10 Power Amp handling the low freq. I now want to Bi-Amp the fronts using 2 X Harmon Kardon PA2400's with the High from one speaker and the low from the other on each amp. There is only 1 set on Front out phono's on the Denon. Is it possible to Bi-Amp with 2 external power Amps? The HK2400's are bridgeable, but does anyone know to Bi-Wire them if I chose to bridge the amps? To help me someone would probably need to be aware of these specific Power Amps as the manuals/setup appears a little quirky. When in Bridged mode the pos(+) terminals for each channel become the Pos(+) & Neg(-) terminals for the bridged amp. I'm wondering what happens to the 2 redundant neg(-) terminals. Thanks for any help, Mark Ward.