AVS Forum Special Member
Join Date: Dec 2007
Location: Southern California
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All readings in db (decibels) are referenced against some standard volume or power level, but without knowing the details of the standard used, they cannot be compared to each other.
The settings of the receiver are rather arbitrary, and have very little to do with the sound level (SPL) in the room.
Just set it up so it sounds right to you, and don't concern yourself with numbers.
I am guessing that 80 Hz may be a better setting for your speakers, but the specs I could find are very sketchy, and don't give enough details to be sure. I would try it.