I use the 5.1 analog outs from my Toshiba 4700 to my receiver(Pioneer VSX-810s. But when I play DVD movies the subwoofer level is low compared to using the optical input. I have calibrated each input using the test tones from the receiver and it's still the same. The setup menu on the DVD player allows me to set the size of the speakers and whether the subwoofer is on or off. All this is set correctly. All speakers set to small with the sub crossover turned all the way up. Is there anything else I should be doing?