I don't know him
or have a real opinion about his amps or other products. They may be great amps, no bs or voodoo, I am sure, but he is not immune from it, as demonstrated by that one product. So, to some, that voodoo product unfortunately is a detractor
One of their truely unique products is the HUMBUSTER, a device that can eliminate the mechanical humming sound of toroidal transformers. In the DIY forum he openly describes how their unit works, and confirms that you can probably build the device yourself for a fraction of what they're charging for the unit ($300 MSRP).
Transformers do hum, the nature of the beats. Not sure about the toroidal design, so, this would seem to be a legitimate product, unlike that detractor.
Also, the PS Audio power cables have a unique feature: The ground pin is removable (it unscrews). This is a fantastic feature to have if you experience ground loops. Those that frequently swap around gear must love this feature.
Yes, ground loop is an issue, unfortunately. But, is that a safe product, lifting the ground like that? Does it meet UL stamp of approval?
Now, again, I don't believe in the Noise Harvester (I pretty much ignored it), but PS Audio does have products like the Humbuster that does work.
However, how is one to know, if uninformed, or gain trust in a company when they have both on the market, a good product and a voodoo of a product???
That is the issue, not that they also make good products. Just like a sighted comparison. At times, you do get the same results as from a DBT, but how is one to know when?