Originally posted by gonk:
My understanding is that we calibrate to 75dB at 0dB volume with a test tone - the result is reference level audio from a DVD (which I believe is up to 105dB at 0dB volume).
Maybe the internal test tone was at -30? It's been a while, but the math and my memory suggests SOMETHING is at -30 .... maybe one test disc was at -20 and the other is at -30?