I too have wondered about bi-amping with the 275 & 462 with a C53 or C2700.
I see 2 ways to do it.
Output 1 C53 -> MC462 -> MC275
Output 1 C53 -> MC462
Output 2 C53 -> MC275
If it were me, I would probably try option 1 first, go from the 462 to 275 as that would still leave output 2 being available in the future.
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McIntosh
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