I'm pretty happy with the way my setup sounds, but sometimes my sub sounds a little too aggressive. I know I can adjust the level and the cut off frequency, but I'm not sure how I should go about doing this. Is there some formula most people use? Is there a cut off frequency I should leave it on that matches a setting on my receiver? I don't want to abuse my sub, but when I turn it down a little it sounds like it should be a little louder, so when I turn it up a little, it sounds a little distorted. Any help would be appreciated.