Back in 2003 was when I bought a PS Audio Power Port Receptacle for $50.00. After following common sense and proper electrical safety precautions such as turning off the correct circuit breaker and verifying the outlet to be worked on did not have power to it any more, I installed the Power Port. I cut off the ends of the wires, stripped off new ends, and upon visually inspecting them, sand papered them as clean as I could get them. Once installing them as needed, I put the entire outlet back together and fired up the power to it via closing the circuit breaker. The lack of smoke or flames was a good sign. Whew !!
With as very humble and modest of a system that I had at that time, (Parasound classic components / separates, Boston Acoustics 2 way book shelf speakers, an Onkyo CD changer, and Monster Cable interconnects and speaker wire - more than cable) it immediately sounded as if their was no more (or significantly so much less) background noise, a black(er) point in space where the sound came from, the treble was so much smoother, the mids were more open and transparent, the bass was clearer, more defined by pitch, and apparent. The treble offered so much more detail and resolution and the slow decay seemed to be much more apparent. I could hear so much more than ever before even on the same songs listened to "millions of times."
I remember that it instantly produced a strong physical sensation of what is similar to having the air sucked out of your lungs and a mental sensation of what it might be like being drawn into a black hole. It seemed like I was being drawn into the sound stage almost like a tractor beam would do in a sci-fi film while I was trying to catch my breath that had jus tbeen taken and was still being taken from me. It sounds weird, I admit it does, but that is how it impacted the listening experience; especially the first time.
This was an amazing experience. Yes, I was totally sober, not high, etc. Since then, I have never used any system without it and never will.
A few years ago, when my wife and father sat down together to listen and experience the difference of with / without the Power Port installed, they listened to the little KT88 tube integrated amp we had along with old Sony ES CD changer and the same speakers but with heavily and fully upgraded wiring and crossovers as I redid them all and some Audio Quest King Cobra interconnects that were nearly worthless in producing any benefit at all over the cheap ones from Best Buy. All of this was without the Power Port for a few songs. Then, about 30 minutes later, I replayed the songs at the same volume and they both noticed the strong, clearly able to be noticed and appreciated differences and nodded approvingly and made several very favorable compliments about the improvements.
My wife (age 22 at the time) is an audiophile and a former saxophone player for seven years, so she knows how live music can, should, and does sound. My father, is a retired architectural / construction administrator / building inspector with no audiophile attributes but who does like good live music of various sorts and can admire the engineering and technical end of this industry and was 77 at the time, so his hearing was not at this best.
Now that says something. PS Audio's Power Port Receptacle is a fabulous product that yielded amazing benefits immediately and without doubt. While it in and of itself makes a huge positive difference, stripping off new ends and sand papering them if need be to have the cleanest copper possible does help a lot. Make sure the circuit breaker is off though.