I have recently bi-amped my 20.1 with a VTL ST-150 (75 w in triode mode) on top and 120w/ch Bel Canto on the bottom through a Bryston 10B crosover. I'm upgrading from 600w/ch solid state.
The enjoyment increase resulting from this change is astounding.
The enjoyment increase resulting from this change is astounding.