Going by amps can be confusing, use apparent power instead, which is voltage times amps. Krell recommends a 2400VA power supply from the wall which is 20 amps at 120VAC (2400/120) or 10.4 amps at 230VAC (2400/230).
The only issue I see is protecting the amp. In the US, we have to reduce the fuse size by half if you go from 120 to 240, and it could be a reason why voltage changeover is usually not user selected -- the user will forget to change the fuse.
The only issue I see is protecting the amp. In the US, we have to reduce the fuse size by half if you go from 120 to 240, and it could be a reason why voltage changeover is usually not user selected -- the user will forget to change the fuse.