I tested the secondary system out yesterday with the DVD copy of Live, Die, and Repeat just to see how my little PSB sub would handle that extra low end at the start of the flick. It went low but stopped digging to the bottom layers of that sub track as expected without any ill side affects. However, I will have to rerun YPAO because the sub output level is a little weak for my tastes. The receiver's level of the sub is set at the minimum level of the AVR. I also can't raise the level of the sub setting on the AVR without it disabling YPAO. I will rerun YPAO with the sub's gain set to 1/4 mark, save the setting and then turn the gain up a biyt on the sub to suit my tastes.