The ARC REF 75SE might also require a dedicated 20 amp circuit breaker. If I were you I would look into that.
How many amps is the current circuit breaker you are using and what gauge is the wire going to that outlet?
Assuming the current circuit breaker and wire gauge is correct I believe the HiDiamond 3.5 could be adapted for your use. Personally, I would purchase a cryoed 15 to 20 amp adapter rather than having to rewire the power cord. Based upon the listening tests I've done I don't think you will be able to hear a difference in sound regarding an adapter vs the installation of a 20 amp connector.
How many amps is the current circuit breaker you are using and what gauge is the wire going to that outlet?
Assuming the current circuit breaker and wire gauge is correct I believe the HiDiamond 3.5 could be adapted for your use. Personally, I would purchase a cryoed 15 to 20 amp adapter rather than having to rewire the power cord. Based upon the listening tests I've done I don't think you will be able to hear a difference in sound regarding an adapter vs the installation of a 20 amp connector.