My first thought was the inside materials and construction. Where the electrical connections will be made. None was shown in the pictures. I'm not saying grounding is not important. Peeking into the receptacle holes, looks like tin or aluminum to me.
Like many things we do as audiophiles my thought on the best power receptacle is, no receptacle. A pain to accomplish. But we do just about anything for the sake of our music.
Like many things we do as audiophiles my thought on the best power receptacle is, no receptacle. A pain to accomplish. But we do just about anything for the sake of our music.