Pass & Seymour 20a Industrial Extra Heavy-Duty duplex receptacle with plug-tail connection (PT5362-AGRY) - these are new (old stock) early production Pass & Seymour receptacles which were highly recommended on the audiophile forums back in the day. Put "Audio Grade" in the name and the outlets sell for $50+ each. These have brass supporting back straps (not the steel ones you see today). Audiophiles claim that the "steel" straps can make their systems sound "grainy". Put 1 or 2 of these on a dedicated 20amp circuit for your system or home theatre and you're good to go. They also appear "beefier" than current production.

I purchased hundreds of these back in the day for high end garage projects and for use in my own home. We ran everything except for lighting in 12 gauge and used 20amp receptacles throughout the shop. There are still a few left in stock. Hospital grade performance. Quick connection with no side terminal exposure. Includes 6" Plug-tail with right angle connector. Made in USA.

Note - if you have small children or your inspector requires tamper resistant outlets, these are not "TR".