No need to be a Marantz engineer to say "yes". That would obviously be the direct path, but there would be other paths via capacitive coupling, that's likely why it triggered the protection.\n\n\nThanks a lot for the additional insights and feedback! \nRight, regarding the 'direct path'; I was also thinking about potential indirect paths, which you summarized very nicely and how that may be why the protection kicked in.\nAmazing that I never had any receiver (had about 8 of them before the SR7013) go into protection mode before from an ESD event. \nAs you said before, maybe the SR7013 or my particular unit is extra sensitive and went into protection mode. \n\nIn any case, I consider myself extremely fortunate (especially after having two defective Denon receivers delivered to me last week:\nOne with a faulty Left Surround output - I quickly and easily ruled out speaker wire and the speaker itself by hooking up the Right Surround to the same Left Surround output with the same results (very very low sound at any level). As an extra (albeit unnecessary step, since I had already tested the known-functioning Right Surround speaker with the Left Surround output), I also moved the Left Surround speaker to the right output and it was fine as expected).\nThe other one )X4500H) had a door stuck open.\nBoth somehow passed Denon QC. Thankfully I bought both from authorized dealer under warranty. Easy returns...\nStill a hassle of course...\nSo I was happy my SR7013 was working great and, after 2 hours, I simply got up to close the panel and then the ESD event... :)\nNever a dull day as the saying goes.