I have had my 7704 for a year & a half. Using XLRs I have it hooked up to 2 Emotiva XPA-1s, 1 XPA2 and 1 XPA-3. I also have the amplifiers attached to the 12v trigger jacks so that everything turns on & off auto-magically. Everything was working swimmingly until I replaced the Xfinity X1 slave box with an Xfinity X1 DVR so I could get 2160p when & if they start broadcasting 4k content. Once I installed this box, the 12v triggers do not seem to work. When the 7704 turns off, the Emotiva amps do not go into standby mode. Additionally I noticed if I switched everything to standby manually, I would go into the room (I don't use this room daily) a few days later and the amps would be back on and the TV would be on but the 7704 would still be in standby and no sound would be coming from anything. I have no kids, or anyone else that would go into this room. At this point I turn the power off to the X1 box, amps and the TV when I am done watching. This saves electricity because nothing is in standby mode, but it takes 5-10 minutes for the X1 box to boot when I turn the power back on. Has anyone else experienced this? Is there a setting on the X1 box that may control this? Finding someone at Comcast that knows how to spell X1, let alone understand their product well enough to help troubleshoot this would be a challenge.