Novice question whats the difference in

A 20 ampere plug on a power cord has a horizontal neutral pin (the hot pin is the same as the 15A) that will only fit into a 20A outlet. It is not the same as the plug on a 15A cord. I would make sure that your amp and circuit/outlet are set up for 20A before getting a 20A cord.

Michael

Keep in mind also 15 amp cord will fit in the 20 amp wall receptical but a 20 amp cord will not fit in a 15 amp wall receptical........

Are your wall outlets electrically coded for 20A or 15A? Consider that each uses a different gauge of wiring within the wall. If your outlet is 15A, you should probably use a 15A cord. 20A cord can carry more current, which would mean that it may not trip a 15A circuit breaker when it is supposed to. I am not an electrician, but an interested audiophile and this is what I have read.

Thank you one and all.