Hi just a quick question. I have my active sub set at 80hz and the volume set at just under half maximum. This sounds correct for the cd palyer and the xbox 360 but when I watch a dvd through the dvd palyer(not the xbox 360 it is a seperate) its like the sub isnt even on. I have to change the volume up to 3/4 of max for it to sound same as cd palyer and xbox 360. Is this normal? Is it just because the way the bass signal is output on dvd's is different and i do need to increase the volume on the sub to make it sound correct or is it normal for the sub to be so quite?(as the volume is correct for the cd palyer and xbox 360) any thoughts?