This is a Plitron 400VA audio transformer with rated 40VAC secondaries. I'm reading 42.1VAC. Is it possible there is something wrong with this transformer, I seem to be overloading the board and blowing fuses. The Plitron site says 3% at maximum load and I'm testing at no load. It is possible that it is not blowing the onboard fuses until I attach the speakers and play through it, but I'm kind of getting tired of opening the unit changing fuses, etc to strongly confirm.