Hello all, I have a Denon X4500H that’s about 7 days old with about two hours runtime on it. This unit is way overkill for myself since all I use it for is music played throughout the house but I’ll go more into that shortly.\nI have 10 in ceiling speakers throughout my home and 2 outdoor speakers on the back porch. Everything was wired while I built the house and runs into a media closet. \n\nMain zone is running 8 speakers:\n4 in the living room that run to a wall mounted volume knob (Center channel)\n2 in the garage that run to a wall mounted volume knob (front left channel)\n2 outdoor that run to a wall mounted volume knob (front right channel)\n\nzone 2 is running two speakers:\nOne in the front bedroom and one in the spare bedroom. They’re both ran directly to the receiver with no additional volume knob and are tied in parallel to Assignable Height 1 R.\n\nZone 3 is running two speakers:\nOne is in the master bedroom and the other in the master bath. They’re both ran directly to the receiver with no additional volume knob and are tied in parallel to Assignable Height 2 R. \n\nThe idea was to be able to play music in each area or all areas at once. Volume control knobs for the main zone would allow us to listen to music in the garage and be quiet in the living room or the back porch and vice versa, etc, etc. Zone two and three could simply be powered on and off as those rooms were used.\n\nI had been having some issues with trying to use just the garage speakers today and it kept causing the receiver to go into speaker protection mode even at low volume settings. After calling and talking to someone who works at the store I purchased the receiver from, he recommended I wire just those two speakers in series and so I did. Again, same problem. I decided to put that on hold and started listening to music in the living room and the very last thing I did was turn the volume knob off in there. After that I went to the receiver to find it was blinking a rapid flashing light every half second. The manual suggests that this means the amplifier has malfunctioned.\n\nI have tried unplugging everything and powering on the receiver and it does the same thing: turns on for about 3 seconds and then shuts off for the same thing.\n\nFinally, and I’m scared to admit this, I started off with a brand new Denon 750H in December and it did the exact same thing to me after about the exact same time period. Only difference was that I don’t remember what the last thing was that I was doing before it started doing this. I contacted the store I purchased it from and they warrantied It with this model because the 750s are out of stock until April.\n\nAm I to blame for this? Is it possible this is just a cruel set of coincidences? If this is my fault what exactly could I be doing that would damage the amplifier? If anything wouldn’t the receiver be damaging the speakers? Any help or advice would be greatly appreciated. I’m losing my mind right now.