I have a new Denon AVR-E300 that seems to be having IP control issues. It will work fine for approximately 20 hours and then stop responding to IP control (network stack on the Denon is still running as it pings fine and the built-in network test works fine). The only solution is to pull the power from the Denon and leave it off for about a minute. It will work again for about a day and then quit. I have a 9-year old Denon 3808CI that doesn’t have this issue, so it’s not Denon in general.
I’m planning on calling Denon support to see if they can do anything, but if not, I may have to upgrade to a different model. The point of all this is how well does an iTach SL (Serial) work with a Denon? I have a couple of spare iTach SLs. Does it provide feedback like IP control? Is it more reliable? For serial, I would have to upgrade to at least an AVR-X2000 (if the IP control was unreliable there too).