I don't doubt there are differences in sound with various materials covering the outlet. The cover plate can be a drum head for vibration, transmitting into the AC connection.
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.
I've done a number of comparisons and found (magnetic) steel to be the worst and the stock hard plastic ones (found in most homes), acceptable.
However, the soft Nylon covers labeled "unbreakable," the ones that are easily twisted with your fingers, performed best in my system.
Regardless, all these tweaks are CHEAP, generally .69 cents to a few bucks, so your next trip to Home Depot consider buying few to try in your own system. Worst case, you might be inspired to clean your AC plugs male connectors with Caig Gold and replace those old scratched up outlet covers.
Before anyone criticizes wall plates and those that wish to experiment, ask yourself if you've ever bought anything for your home or car because it looked nice and only cost a couple of bucks.
This is supposed to be a fun hobby. No harm in experimenting and showing pride in your music making machine.
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.
I've done a number of comparisons and found (magnetic) steel to be the worst and the stock hard plastic ones (found in most homes), acceptable.
However, the soft Nylon covers labeled "unbreakable," the ones that are easily twisted with your fingers, performed best in my system.
Regardless, all these tweaks are CHEAP, generally .69 cents to a few bucks, so your next trip to Home Depot consider buying few to try in your own system. Worst case, you might be inspired to clean your AC plugs male connectors with Caig Gold and replace those old scratched up outlet covers.
Before anyone criticizes wall plates and those that wish to experiment, ask yourself if you've ever bought anything for your home or car because it looked nice and only cost a couple of bucks.
This is supposed to be a fun hobby. No harm in experimenting and showing pride in your music making machine.