I purchased a Fender '68 Custom Vibrolux that runs on the US 117V, and i can run the amp here (in Ireland) no problem thanks to this TAD transformer! I don't have a lot of experience in using transformers with amps, but I imagine a cheap and nasty transformer would not be ideal to run an amp off. Between ground hum, and the possibility of frying your amp, I'd definitely recommend getting something solid and reliable like this product!