Yeah additional wiring isn’t necessary. You will be using the same speaker wire that would already be there. But I stead of them originating at the marantz they will originate from the amp. With I interconnects going from the marantz to the amps.
Does that make sense?
Thanks, that does make sense and was what I assumed, but didn't want to miss anything based on the previous comment to ensure the room is wired correctly now for additional amps in the future.