I used the spl meter and thx optimizer from monster inc and followed these directions: Set the meter to 80db C-weighting and slow responce. Now turn your receivers main volume control (the big knob on front of the reciever) till you read 75db on the meter at your listen position with the left main speaker playing it's test tone. This may seem a little loud but it's only for calibrating! Question:is it right that at like -23 on my receiver i ended up with the following: FL - 0 was used as main test speaker to read 75db center - (-7) FR - 0 SR - (-5) SL - (-6) Do other people have odd settings like this. FYI the FR and SR speaker are about a 1 ft. farther from the center point of sitting then the FL and SL speaker.