JMS:

I sometimes have to mess with the center dialogue level for certain films, but I don't change the levels of the other speakers once set.

The calibration method I outlined should give results that are pretty close to the results you would get from calibrating using other sources of the calibration tone - in an ideal world. The problem is similiar to the man who wears two wrist watches and therefore has no idea what the actual time is when trying to calibrate to different "standards" which should in theory be the same. My method will average the response of the speakers over a wider frequency band and be less dependent on the frequency response of the speakers at a narrow frequency range - this should correlate better to what your ears actually hear as loudness.

I'd use 60Hz with the Mackies.

[This message has been edited by soundhound (edited January 24, 2004).]