Measured 10 main spots(refer to pic). Used Radio shack digital meter cat.no. 33-2055
EQ settings according to Onkyo 876:
OS dial between 24 36, avr at spl-2.5db, speakers -12db spl75db
SPL readings: (1) 74 (2) 70 (3) 69 (4) 69 (5) 71 (6) 71 (7) 69 (8) 66 (9) 66 (10) 66
According to the meter I was not even close to 75db on the sub, not sure why audessey set the sub to -2.5db?
So I bumped the sub level on the avr to +2.5db while using the meter in order to get 75db. Keeping everything else the same (amp dial and speaker settings). This is what I got.
SPL readings: (1) 79 (2) 75 (3) 74 (4) 73 (5) 75 (6) 77 (7) 73 (8) 72 (9) 70 (10) 71
After doing the bump on the avr to +2.5db I was able to hear the bass and feel it a little.
I played a few movie scenes with eq and without eq using the new +2.5db sub setting and this is what I got. At position 2 (LP)
Iron Hide flip Transformer Eq 97db no Eq 107db
War of the worlds Pod Emerg. Eq 85db no Eq 93db
Cloverfireld Eq 100db no Eq 106db
The sound of the bass with the +2.5db 75db setting is better as I can actually hear something without wondering if the sub is on compared to before.
Also, I turned the OS dial up to 10 while leaving the sub at +2.5db but got 85db on the spl meter and got a massive jump in performance. Was hitting 116-117db on the SPL meter on some of the same scenes.