Mojo,

I think each channel would "see" roughly the same nominal impedance (6 ohms) of the VP150, although this becomes complicated by the fact that each channel's amplifier is connected to the output section of the other channel.

The output impedance of most transistor amplifiers is essentially zero ohms, but amplifiers were never designed to be connected to each other in this fashion. Perhaps JohnK would comment.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)