Quote Originally Posted by Mike Anderson
Yes, that's basically just what I did: After tuning with the test tones, I put on Krall and a few other high-quality recordings, and set the subwoofer gain so that it's about as loud as it can get without being boomy.

Thanks for the feedback though, it helps me know I'm on the right track.
Over time you will probably find that setting the subwoofer gain as you have done leaves it a little to high. One of my friends did exactly as you have done. When we had our irregular monthly beer, snack and music get together at his house the three guests (two other lunatic fringe audiophiles and myself) unanimously thought the woofer level was just a tad too high. He turned it down just a little and has left it there. We alternate with our meetings. He was eager to show of his new DIY transmission line sub, so the get together was at his house. We all liked it a lot! I am now in the process of building two for myself. Most people have the level set too high when they first get a good sub. I did and so did all of my fellow audiophiles.