For my main system - three. A Bryston 4BST for the front channels, a second Bryston 4BST for the rear channels, and an Adcom 555 for the subwoofer. That about all my electrical system should be asked to handle.
I also have two more systems in the house (mostly for background music) with an Adcom 545 upstairs and a tiny little Technics amp, from the 80s, in my basement system.
Tim
I also have two more systems in the house (mostly for background music) with an Adcom 545 upstairs and a tiny little Technics amp, from the 80s, in my basement system.
Tim