Yup, it does. My channel 1 power control knob doesn't do much anymore. Even when the knob is at zero it sends the signal to the speakers & its pretty damn loud. The signal light goes on while im playing even on zero! If I turn the amp channel 1 power control from 0 to 26 its a little louder but not much... because at zero its already loud!!! Channel 2 works right which is that zero power means no noise, no signal until I turn it up. When I turn channel 2 power from 0 to 26 the difference is huge. I tried both stereo & parallel mode with the same results, used the same cables & interchanged them. Checked all my amp settings 10 times. Bizarre its true... so let the you get what you pay for... Behringer stink comments fly but if anyone knows why the amp does this & if theres something to do about it please let me know! Luckily I have QSC backup that I have to get back from a friend... maybe get another QSC as well.