Thanks for the feedback. Actually, since my son works part time at Radio Shack it sounds like I should invest in an analog SPL....so no, it is not calibrated. As far as the settings my reciever is stereo only with no settings; I use the preamp out and the sub settings. And boy I have been fiddling with those...from 40hz to 60hz mostly. So I will try the higher crossover. I used to "like" the sound of the sub but it sounds very boomy on some mid-bass now. So I might try a moving it.