I originally was using another test disc to balance the levels on my system called The Ultimate DVD Platinum which stated to make sure via a sound meter to up the level on the sub so that it's 2 increments more on the sound meter than the mains. I just got the Sound and Vision Test disc and it said to just do the level via ear. Help! I'm confused. The sub is a different brand than the mains. Is there a standard level say 2 amps more than the mains that the sub should be? I'm using the Radioshack analogue meter. thanks. peter.