In article J8RKi.4028$Wo4.3426@trnddc03,
James Sweet wrote:
I've never seen a piece of consumer A/V gear with a grounded power cord,
regardless of what the case is made of, but it certainly won't hurt
anything to ground it.

Lots of Far East gear in the early days had grounded cases to pass UK regs
without going to the cost of double insulation. And when you plugged
separates from the same maker together using the provided leads you got a
ground loop...

Grounding an amp case only may well be ok since that will be the 'master'
part of any system. But doing the same to other separates will almost
certainly create hum.

--
*In "Casablanca", Humphrey Bogart never said "Play it again, Sam" *

Dave Plowman London SW
To e-mail, change noise into sound.