MyPants
100+ Head-Fier
My BasX A100 showed up today and I immediately installed the jumpers. With HD280 Pros there is somewhat significant idle hiss but it seems to go away or be otherwise imperceptible when music is playing. With my HE400i however, there is no noise floor whatsoever. With the TH-X00 there is SOME noise floor not not much, so it appears to vary pretty widely. Overall it sounds GREAT. I'm extremely pleased and can't wait to hear the LCD-2C on it tomorrow.