Yeah, tried different cables, everything sounded fine in the front, I have a router box set up that allows you to switch pedals from the front to the loop by stomping a button. I tried with and without this router box as well, just in case.
Even just running a short 1ft patch cable from the effects send to effects return, with nothing even plugged into the front, made the Archon Classic buzz loudly. I had read about the effects loop being noisy on some of the older Archons and Tremonti amps, but it seemed as though they had worked out a fix for that.
