After popping in the Video Essentials DVD, and callibrating with the SPL meter in hand, I started wondering which "sub" feature I was actually adjusting. My reciever (Sony STR DE945) has three sub woofer lever parameters: Sub woofer lever, LFE mix level, and the dts SFE mix level. Now with the VE DVD, does anybody know which parameter I am actually adjusting? One more question, should I first adjust the level of my sub first, then adjust accordingly to what VE tells me? OR should I not even bother with the level knob on the sub, and just keep it where it is and then adjust to what VE tells me? Thanks for helping one confused guy.