Add an IEC socket..any negative effects?

JohnT: I believe a chassis punch for IEC's, and IEC's too, are available from Parts Express. Others here may know of alternative sources? G13: I'm thinking he meant to NOT connect the ground (usually green wire inside the component) to the IEC's ground prong. May or may not be a good idea sound-wise; definitely not recommended from a safety point-of-view. You could even experiment by installing a toggle switch on rear chassis-panel, to make or lift that ground connection. But then again, that too could affect sonics vs. a probably-better hardwire ground connection.

G13 your perception is correct ("IF the component has a 2 prong plug now - what I suspect would be ok is to connect the positive and negative to the IEC INPUT, dont connect the ground connector of the IEC input to anything"). With an upgrade/shielded AC cord, the grounding at the Plug-end would still shield your cord up to the IEC-end. No ground is REQUIRED inside the component, but it may or may not sound better grounded (probably not). It will definitely be SAFER grounded, though it wasn't built that way. I wouldn;t lose any sleep over it though; the probability of an internal component failure causing the chassis to become AC hot is extremely low. It could happen, but even so the ground of interconnects would take the lethal voltage to another component which may be grounded.