This 10awg 3 outlet 1ft extension works quite well. I have 2, 1 is configured with 2 2Main Streams, the other has 2 Snubways plugged into it. Both extensions are plugged into 2 of the receptacles in the quad box servicing 20a dedicated circuit.
Mid-fi 2ch streaming system is extensively optimized, but there has been a very stubborn, faint, but annoying buzz coming from both speakers. Slightly more audible in the speaker nearest amplifier vs the other. You literally have to place your ear flush on the cone to hear it.
This combination of MS’s & SW’s at the wall outlet has chipped away at that last bit of remaining noise where others have fallen short.
Below is the link to the short multi-outlet extension. It’s the only 10awg in a 1ft length I could find.
Maximm 10/3 Indoor Extension Cord 1 Foot, 10AWG Black ETL Listed, 3 Prong Plug 3-Outlet Heavy Duty Indoor, Power Cord 1ft https://a.co/d/cPgxjQd