Hi, I have a question about subwoofer calibration. This is a spinoff from another thread. I have attempted to calibrate my system using Avia and the Rat Shack analog SPL meter. I had to turn my sub amp to about 1/2 maximum so that I could properly level match (all speakers are set to small). The test tones produce a relatively steady meter reading (response=slow) with the other speakers. But with the subwoofer, the needle jumps around during the test tone, because the sub test tone is an uneven rumble rather than even pink noise. Given that it jumps around so much, how do I determine if I have a level match? Do I try to guestimate the middle of the range that it is jumping around in? Or do I choose the high or low end of the range?