Not to through a fly in the ointment. But it is possible you may effect the sonics of the Amp. For better, or worse??
From the mains of the U.S. 240V you will essentially be feeding the Amp from a balanced power system. Also the voltage may be closer to 250V + . You may want to have that checked first. Also check what the maximum input AC voltage rating is for the Amp.
As for the NEMA 6-20R receptacle that would be a good choice. If you already have an extra 120V dedicated circuit by your audio system all you will need is a 2 pole 20 amp breaker installed at the electrical panel and the two insulated conductors of the dedicated branch circuit terminated on the 2pole breaker.
From the mains of the U.S. 240V you will essentially be feeding the Amp from a balanced power system. Also the voltage may be closer to 250V + . You may want to have that checked first. Also check what the maximum input AC voltage rating is for the Amp.
As for the NEMA 6-20R receptacle that would be a good choice. If you already have an extra 120V dedicated circuit by your audio system all you will need is a 2 pole 20 amp breaker installed at the electrical panel and the two insulated conductors of the dedicated branch circuit terminated on the 2pole breaker.