Remember greggp2 that you can also turn up the sub using the volume knob on the subwoofer itself. If you do that you can re-adjust the avr level down a bit to compensate for other sources or re-adjust the volume knob back down to the original position.
BTW I am using a Panasonic BD55 and by boosting the multichannel analog through the avr and adjusting the settings accordingly in the player itself I am very, very pleased with the results. I am lovin' my Blu-ray
.