I have the OPPO connected to my pre-amp (Parasound Halo C-2) via the analog 5.1 connection. I set the volume on the C-2 to zero, which should be the reference level and used the speaker set-up function from OPPO to set all speakers to 75db. I then used the Spears and Munsil HD Benchmark calibration disc to re-verify the levels and found out that now the output level was 10db + less. Should these two not match?
Also, The C-2 has it's own auto calibration function. If I then use that as well - do I void what I did with the OPPO?