No grounding prong is quite common, my PB 13 and my 3808 do not have a grounding prong either. I have no idea why this is somewhat prevalent, never really thought about it. I do know it cuts down on ground loop humming to an extent.
I wonder if the 3808 had a grounding prong if my 'accident' with the A1400 would have been as bad, as I recently picked it up from the repair shop(after 4 months
. It had been sent to Denon and the ground on the circuit board had been melted off the board!! They simply used a piece of wire to fix this issue, but if there was a true ground to the outlet would it have shunted the power better and saved the receiver?
