Herbie’s Super Black Hole CD Mat - Wow!


I just received the Herbie’s Audio Lab Super Black Hole CD mat in mail. It’s a little black disc that fits atop a CD which has silicon on one side (the side that touches the CD) and carbon fiber on the top. I’ve only listened to a few songs (electronic genre) and my first impression was simply “Wow!” I’m hearing so much further into the recording. I’m hearing the ambience much better. Notes have more texture. Imaging seems to have improved. On one track, there is a sound that is panned to the right and repeats three times. I thought it was identical on each note, but with the CD mat it’s easy to hear that on the second note, it actually moves 6 inches towards the center of the soundstage and then back out to the right. It’s always fun to rediscover your music when you find a tweak you enjoy. 
From their website, this is how they say it works:

“By reducing micro-vibration in the CD spin during playback, laser-reading error is potentially reduced. (Error correction in audio CD discs is not perfect; it is algorithm-based "guessing," not binary like in data CDs). By damping the disc/clamp interface, micro-vibrations generated by spinning discs are hindered, keeping them from permeating throughout the player where capacitors, op-amps, micro-processors, and other sensitive parts can be adversely affected.”

I can’t confirm whether or not that’s the whole story to how it works, but I’m convinced it does something amazing. I will report back after I listen to some more music of other genres.
128x128mkgus
More proof, Mr. Eels. The Monster Cable CD Rings have some mass to them and are attached to the outer edge of the CD on the label side. Yet, the CD spins perfectly fine. Better, really since the CD ring stabilizes the disc, which the teens weenie doughnut things don’t.
I used several CD mats for years. Upgrading power cords rendered them useless; in fact, they degraded the sound. What I commend, without reservations, is Purist Audio Design's Luminist System Enhancer, a disc that cleans up your system much as cleaning your PC's hard drive results in far better performance. On the pricey side ($200) but worth it in spades. 
You mean for years you couldn’t tell the mats degraded the Sound? 🤡

I've used four different CD rings including a green and black Marigo. The Herbie's use results are the same in my system as in Robert and Frank's. Diminished musicality, reduced dynamics and compressed sound. Not good. However, I have an alternative use for the black hole. I use it around the center spindle of my VPI TNT VI with superplatter. It slightly lifts the label area to good effect with the VPI heavyweight to provide a better VTA for standard LPs (140mm and thinner). It's probably due to the VPI platter's slight indentation slope towards the spindle area.
I also have an Ultradesk cutter and demagnetizer. I have since found that the Walker Talisman demagnetizer to be a superior and elegant product to use on every disc, CD and LP, with obvious benefit to every CD I play. Sure, it over $200 for a pair of magnets but I use it exclusively since 2008. Wonderful product or make your own. Easy to test. Play an undemagnetized CD, then swipe the Talisman on top and below the tray with the disc in it holding a finger on the edge. Then replay CD. Voila, clearer, cleaner sound. Just as if the resolution increased and distortion/hashy sound decreased.  I wouldn't want to be without it.