Just picked up an SC-79 last week. I'm having an issue that I hope somebody with some deep-tissue knowledge can help with.
Configured as a 7.1 system. Ran it through mcacc. Sounded great. Then I grabbed a movie with some transients. (RED, initial scene where the house is attacked.) Volume was set to -17, and the whole thing powered down, with the IPod light flashing. (System is wired with banana plugs where possible, and these speakers have been working fine for 13 years on the previous receiver.)
Tried Digital Safety 1 and 2. No change. Started disconnecting speakers from front to back, retesting each time. Still shut down.
Then I started adding the speakers back in from front to back. NO shutdown until I got to the rear speakers. So I left it all hooked up and tried adding the rears one at a time.With either rear hooked up, no shutdown. With BOTH hooked up, it shuts down.
So, I don't seem to have a stray wire issue. I'm guessing that the issue is that the speaker wire to the rear channels runs about 110 feet, give or take a few. It's 14AWG wire. Yes, a little thin for that long a run. But would that cause this fancy new receiver to freak out and shut off at the first sign of a little noise? Does this sound like a capacitance/inductance issue? Remember with either the left rear or right rear hooked up individually, no problem. It's only when they are BOTH hooked up that it shuts down.
My guess is that I can solve this problem by addressing the wire run. Will replacing with 10AWG wire do the trick, or do i really need to find a way to shorten that wire?
Any advice would be appreciated. Bonus points if anyone can articulate why that amp is shutting off, and exactly what Digital Safety 1 and 2 do.