brass outlet covers...anyone try them? Sound good

So, depending on how close your speakers are, room construction, type of AC outlet and overall system performance it could make a nice improvement in sound when you swap out the cover.

A 2 3/4" by 4 1/2" electrical cover of surface area 12 square inches in an average 16 by 12 by 8 ft room with total surface area of roughly 120,000 square inches.

This makes less than 1 hundredth of 1 percent of the surface area???

Surely, in order to make a "nice improvement in sound" then

1) the cover would need to be totally loose and rattling terribly - unusual but possible.
2) An extremely stiff power lead connected to a humming device (transformer or shaver or something like that) - again unusual
3) next to one's ears (listening position on the floor near a wall) - again unusual

I can't see that being simply close to a speaker would be enough. I also can't see how changing the cover material could be possibly be enough to be audible under ordinary circumstances.

Have I experimented like Freemand? No....but come on guys! It ain't April the 1st is it?

Has anyone considered bacteria? Some types of bacteria will break down petrochemical products, albeit very slowly.

Theory: The cover acts as a drum head and amplifies the sound of the bacteria mulling about along the surface.

Of course, brass is of no interest to bacteria - so it is better than plastic. Wood has natural toxins that kill bacteria - so it might be even better still.

As long as there are no termites in your climate, I 'd go for wood, brass would be a close second!