You need a wallwart adapter ps to power the basic Stax amp's. You can't run them off anything else. I haven't asked Mech lately about whether she bought a matching wallwart or using a step down trafo, but she is using either of the one. How are you going to power the 252 if you don't use an AC adaptor?
Edited by DefQon - 7/10/13 at 6:54pm