The Plasmatron - more linear output voltage

Zd542, I'm in complete agreement with your statement.

Almarg - I had hoped that you would post.

I certainly don't consider my EE friend the end all for audio design, but he does have some experience with amplifier design and enjoys audio as a hobby as well. EE's certainly don't know everything, but are far more likely to see through gimmick marketing (not intending to use this product as an example) in a market where the average consumer know little to nothing about how the equipment actually functions. Buzz work bingo is good enough as long as we believe that it sounds better. My friend has specifically mentioned Krell as a company that uses scientifically correct and sound marketing where a EE can truly appreciate something g about the equipment. This isn't the norm.

Ptss, in response to your question, I have listened extensively to Cardas Golden Ref power cables as well as Audience. Shunyata Anaconda, Synergestic, and others, etc.
Power conditioning has been Bryston Bit20, Gray Substation, PS Audio Powerplant, Synergestic Power Cell, and others. One of the best combinations was the Plasmatron plugged into the Gray and PS Audio. Pushed the package forward substantially.

Negative differential resistance would be the better term, since it has to have some resistance in order to produce negative resistance change. Fluorescent tubes are also a negative resistance devices.

I cannot see how this device would help with gear that already has built in voltage regulators - pretty much any device other than power amps, but today many power amps have SMPS including half of class D amps and some class AB amps like the newest high power amps from Rowland. Perhaps resistance of this device have some filtering effect reducing power line noise.

"My friend has specifically mentioned Krell as a company that uses scientifically correct and sound marketing where a EE can truly appreciate something g about the equipment."

Your friend might want to re-think that one. If there's one thing we know about Krell's marketing, its the slogan "un-phased by any load". They built their business on that phrase. The problem is that its a flat out lie. There's no amp that's un-phased by any load. If that were true, they wouldn't be making amps that put out different amounts of power. Based on their marketing claims, there would be no need to.