I took a leap of faith after watching the Hifi Huff review. Well, also because i have only had good interactions with Vinshine, pre & post purchase. On with my impressions:
At this time, this is limited to the static/buzz I hear on my Cornwall IVs when music is not playing. This was audible from my couch, which probably irritates me more than it should. The static/buzz started when I purchased my 1st tube amp, the Decware SE84UFO2.1. I reached out to Decware and one of the recommendations was to get a humdinger by Van Alstine. I can't remember the order of my purchases, but I also have the Decware Line Conditioner (ZLC). I had the following plugged in, in the following order: Wall>Humdinger>ZLC>stereo gear. This reduced the amount of static/buzz but it was still audible from my listening position. I also moved so I have 2 test cases for this, however the result was pretty much the same. Anyhow, I didn't learn my lesson or I like to torture myself so I ordered a Decware ZRock3 (EQ) to get a little more bass from my SE84UFO. The ZRock has a gain in the back in addition to the knob on the front to increase/decrease base (there is also a switch, but that's not really in scope at this time). I apologize for my crude descriptions of these features. I tried the ZRock3 between the Preamp and the Amp and also between the DAC and Preamp, as that is the recommendation from Steve at Decware. Great, honest guy by the way. He recommends placing the ZRock where it sounds best to me.
Long story short, increasing the gain on the back of the ZRock3 increased the static/buzz while connected to the SE84UFO. I also tried this with my Pass Labs XA-25 with similar results. I could turn the gain down, but now I was turning up the volume on my preamp to get the same amount of volume (I don't know if this is a bad thing or not, but it's just what I experienced). Keep in mind, this is my experiences PRE-Tai Hang.
Post Tai-hang: By post, I mean I've eliminated the Humdinger and ZLC from my chain. It's just the Tai Hang to my stereo gear. I can plug in my SE84UFO and ZRock with the gain turned up to MAX and the static/buzz is no longer audible from my couch. It is still there, but I have to put my ear up to the horn on my Cornwalls to actually hear it. Success! I have been chasing this "issue" for a couple years now. Glad to say it was money well spent on the Tai Hangs. I purchased 2 so I can really maximize the benefits (1 Tai Hang for my amps/preamps/tube gear and 1 tai hang for my sources (DAC, transports)).
I am still testing some things out, but ironically if I use my XA-25 in conjunction with the ZRock3, the static/buzz volume increases, although to a much lesser extent when the ZRock3 gain is turned up. I guess Decware products are made to pair better with their stuff so it makes sense in that regard.
Once I situate my gear again to plug into their appropriate Tai Hangs, I hope to just enjoy the music soon.