There is magic to Avia's suggestion of 85db. The magic is that the Avia tone is 20db below reference. Reference is 105db at the listening position which is the maximum that your speakers should hit during the loudest part of the movie (not including the LFE). So if you want to hear what the sound engineer intended, calibrate your system with an Avia disk to 85db at 0 on your receiver. then set your receiver to 0 when listening to a Dolby Digital DVD (which would now be reference) and you will hear what the sound engineer intended (at least with regard to volume levels).
