Guys, I am sorry for the late reply. I will try all your suggestions tomorrow and see how it goes. Just arrived home.
Picked up the meter and tripod on my way home.
Anyway, my room is 28 x 23 x 9'. Sub's trim is set at FLAT. At 7:30, I got a W-3: Level Error (Subwoofer too loud). When I adjusted sub's volume contol knob down to 7:00, and run the receiver's AUTO SETUP, I obtained a sub level of -10dB. The other 5 speaker's level range from +7.5 to +10dB. Please see tabulation below:
SUB @ 7:30/SUB @ 7:00/RECEIVER TEST TONES & SPL
Front L/ +1.0dB/ +10.0dB/ +3.5 @ 75dB SPL
Center/ 0.0/ +8.5/ +2.5 @ 75dB SPL
Front R/ +0.5/ +9.0/ +3.5 @ 75dB SPL
Surr L/ -1.0/ +7.5/ +1.0 @ 75dB SPL
Surr R/ -0.5/ +8.0/ +2.5 @ 75dB SPL
Subwfr/ (none)/ -10.0/ -5.0 @ 85dB SPL
Warning W-3: Level Error
Subwfr too loud @ 7:30 knob position
