changing from 220v to 120v

Depending on the gear, yes. With linear power supplies we often see transformers that are manufactured as dual voltage units. These transformers use two primary coils, and depending on whether the primaries are connected in series or in parallel to each other they work with 220 or 110.

It’s a common cost-saving technique.

Best,

Erik

Thanks for the response.  Do you know whether Bryston builds their amps for easy conversion?

Shouldn't be a problem. Cheers,
Spencer

Do you know whether Bryston builds their amps for easy conversion?

If the dealer is doing it, without sending it back to Bryston, then it’s easy.
"Could" even be an internal switch, or soldered bridging pads
Cheers George