Bass and treble are set to 0 on the 990. I used the auto setup and front speakers are at 17 feet. Speakers are set to small- 80hz. Volume on the 990 is between -6 to 0. I was listening to 2-channel stereo. Customer service are extremely helpful. They sent me a new 7125 and after about 45 mins it shut down the left front channel. Maybe it something else. I'll troubleshoot some more and update all. Any suggestions will be greatly appreciated. Thanks everyone.