I currently have 2 dedicated 20 amp 110v lines.
Jaf2290
An electrician can convert one or both of the 120V dedicated branch circuits to a 240V branch circuit/s. The receptacle must be changed out to a 250V receptacle and at the electrical panel the branch circuit wire will be reconnected to a 2 pole 15 or 20 amp breaker.
Just so you know a smart knowledgeable electrician may refuse to install a 240V branch circuit for your audio equipment....... For residential applications NEC does not allow such if memory serves me right.