How do you use it? Sounds like a good tool.
Hmmmmm. It's hereand it is basically an EQ to help flatten out bass response- little black box that goes in between preamp and sub input. It samples your room's sound with a detachable microphone and then determines an optimal EQ curve. Might have some merit if it works as advertised without causing problems of its own.
I don't know the tech details, but the unit runs a low frequency sweep that is measured by a microphone provided with the unit. It looks at your room response and applies and analog filter to flatten out any bass hump. The instruction tell you to place the unit between preamp/receiver and sub. Run the test tones and basically apply the filter. I found that by adjusting my crossover point on the sub 10hz higher than usual while setting up the unit gave me the best effect. You can get information on this thing from the following locations: www.subwoofer-sos.com, www.speakercity.com, email: www.suboptimizer.com. My local dealer manager knows the guy who designed the unit and they are selling them there and also on the internet. The manager said he would be happy to answer any questons on the unit. His name is Andy, he can be reached at email@example.com, (251) 602-1631 or (251) 680-6959.