Stranded vs Solid Copper

I’d agree either stranded or solid should work the same. I’d use solid for internal box wiring and stranded for cables, based solely on flexibility.

I use a pair of long extensions from a 20 amp single duplex. My extensions are quad twist 12 gauge 600v Teflon covered. To sets of a total of six duplex over by my system. Stranded wire.If it were not quad sets I would have used ten gauge stranded wires. I just bought 12/2Romex to play with to see if I like the sound better. Since the extensions are pretty much never moved. solid core is no problem.Sadly I am lazy, and it may be a year of more, or tomorrow before I decide to try the Romex out.

For my dedicated cuircut I used was a 30amp breaker, 10/2 solid copper, and a self grounded heavy duty outlet. I like the results. You also want to be comeing off the leg of your breaker box that your AC and the like are not on.

tedag

For my dedicated cuircut I used was a 30amp breaker, 10/2 solid copper, and a self grounded heavy duty outlet.

Are you using a 30A receptacle? That's unusual for household use and would probably require putting new AC plugs on your amplifiers. If you're using a 20A receptacle, that would be a code violation in many jurisdictions.