120v to 240v Adapter to power Amp in USA

Can you ask the manufacturer to wire it for USA voltage when ordering?

You can't just put a double pole 20 amp breaker in the panel box and get a plug adapter. You will have to make sure the wire running to your receptacle is at least 12AWG as well as all receptacles and switches on that curcuit per code. 

Not only that everything on that circuit would then be 240 and everything on that circuit would need to be upgraded and possibly switched to a different circuit for instance if there are any light fixtures. Easiest thing if possible would be to run a seperate 240. 

Right on the running a new independent circuit with 12-2 for a 240. That’s what I would do. 

Also, Stereo5 I co reacted Atoll and they said they can be made to order with the 120v, but once they figured out I was from the USA trying to order an amp from France that costs $1000 and have it be made with 120v they wouldn’t do it. They said to go through the only distributor in the US because they don’t want to circumvent him. However, he charges $1900.

I had already paid and everything and they made the dealer from France refund my money. All amps are made to order and they wouldn’t do it even though I said I would pay extra for the 120v option. Still waiting for the refund to go through. 

The distributor in the US is super nice and knowledgeable but I don’t think overcharging because you have a monopoly is very cool. These things go for €839 all day long all over Europe.