I have always been a fan of the standard Hubbell 5362 industrial duplex with heavy brass backstrap. Its a solid duplex. You can get them from a supply house for around $35. Recently I was introduced to AV Options. They actually reached out to me with a customer that needed help powering a whole home and audio system. In our conversations AV Options told me about taking the 5362 I recommend and having it deep cryo treated by a plant they feel does some of the best cryo in the country. They sent me one of their duplex to try. I believe these duplex sell for $75. I am going to insert the duplex this week and use my amplifiers with it. I have high hopes as I use to have Porter Ports in my system which are basically the same duplex. I was sort of bummed when Albert stopped making them. I am happy to have a new source. I will give an update next week after the duplex has settled and I can compare it to a stock 5362 with no treatment.