You don’t have two amps. You have an integrated amp and a power amp.
^^ this ^^
details truly matter
Tube and Solid state
How would one go about hooking up two amps simultaneously to one source? A Yamaha A-S2200 solid state, and a McIntosh MC275 tube. Is there any preamps out there that can handle playing two amps from the same source, together at the same time?