In my system, (when the 990 is recieving a sound signal) if the sound goes off , there is a "tick" noise that comes throught he speakers. It specifically happens only when recieving a signal, and then the sound is turned off, not on the process of coming on.

You can also hear it, if recieving a signal and volume is on (-75), then turn off the sound to (-76) it ticks. It's loud enough to notice. Seriously it's hard to ignore.

It happens when commercials come and go. It happens when changing channels. It happens when listening to CDs and changing tracks(so it's not the cable box, it's whenever recieving a signal).

I could go into all the things I have tested. Let's just say I'd be severely shocked if you came up with a different thing to test. Even had a volt meter to the AMP and 990.

If Outlaw's customer service were not as good as it is, I would not be here.