Hey Otto

Using my radio shack meter is when I find the level problem. I can get all my other speaker levels spot on perfect. But to get the sub level to be correct on the meter you have to set it very low. When you listen to material at this setting there is little bass output. My thought is that the test tone generator on the 990 is sending a full range signal to my subwoofer.I have no cross over adjustment at my sub to filter the high freqency signals, so this may be creating the incorrect level adjustment problems.
Has anyone else run into this. Try turning off, or up your sub crossover setting and see if you get a higher output level during the test tone??