Question about electrical outlets

I doubt very seriously that two power strips into the same outlet will accomplish anything. Two dedicated lines from your service panel would work, but that would make sense for a bigger system, not just headphones. Look for something with "Digital Filter", "Isolated Filter Banks", etc. There is various terminology that different manufacturers use, but the product description should be clear as to what they do.

Apologies - the first time I Googled wiremold something else much less Impressive came up - you might find the Furman power bar will not perform any better than the wiremold.

A power conditioner might be your next best bet. This cleaned up my system until I could implement a much better power bar

Checkout the Furman PST-8 D - a little on the pricey side, but should work very well
http://www.furmansound.com/page.php?div=02&id=TECH

The best config for any power bar is a "star" type connection ( see DIY power bar in my System for schematic)- where all outlets are connected to a central point, instead of simply connecting them in parallel. It has the same effect as connecting each plug into a wall outlet.

Regards

Hold on to your hats now. Output devices & other systems have been suffereing for years for lack of "star" interconnectivity. Sorry. Thats like believing that the holes on the blades of electric plugs are to let the electricity in. All electric panels are parallel distribution.

Check out PSAUDIO very easy to talk to

Gvasale - apologies, I used the wrong term - the method of connection I was referring to is a "BUSBAR", where each outlet is wired directly to a single live and neutral point or rail - as opposed to bridging the wire from outlet to outlet.

I've found this affords a level of isolation between the attached components, similar to installing a dedicated line for the hi-fi isolates it from the electrical noise created by other household appliances connected to the same breaker panel.

Please see Power Bar Wiring (scroll to the bottom)

Regards...