A number of folks have had trouble with the 990's Auto setup, me included. If you don't have one, I suggest you get a radio shack SPL and calibrate the individual channel levels using the manual method.
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AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7