What I don't understand is say you have a sub that can only go as low as 20 Hz. You calibrate it with Audyssey and then use the app to extend the curve to 10 Hz.\nWon't this approach damage the sub?\n\nHey asere! I think it would depend on the sub. For example sealed subs would tolerate the boost a little better but you'd likely run into distortion. With a ported sub you could unload the driver and bottom it out and start breaking stuff. I wouldn't try it with a ported sub.