With all this talk about AVIA and DVE, I had a question about calibrating ones sub with the recievers internal pink noise. My question was in regards to the built in subwoofer test tone. I was told in the past that the tone is composed of many different low level frequencies. I was just wondering how would one go about calibrating their sub properly with a Ratshack SPL meter and this tone ? I know the Rat meter is not very sensitive and that is why there is a "compensation" chart out there. My question is, does the compensation chart apply to this tone ? And if so then what's the variable ? Also, is the THX Optomizer any good for rough calibration ? And if so then is there any "compensation" chart to follow with the LFE test tone ?