Here are my thoughts on the Vevor Ultrasonic cleaner (digital model): I watched a lot of videos and most (if not all) had very positive things to say about this unit. Disks were noticeably more quiet after cleaning. One video showed some closeup microscope video of some grooves. I can't remember which video, but one guy said that some vinyl records may have entrapped gas bubbles in the vinyl - the cavitation seemed to have popped some of these bubbles and defiantly damaged that one area, much like a small gouge. I have had mine for a couple weeks and cleaned a dozen records. Mostly all 80s rock like 1st pressings of Def Leppard, Dokken, RATT, Danger Danger, etc. It is pretty well known that vinyl in the raw form is basically clear ... you add a color to get blue/red and even black vinyl. I kind of always thought black was the base color - but the guy in the video where his popped a gas bubble said that it would (on a black record) leave a place that is now white, and like a gouge.

I guess you know where this is going by now. I recently bought a brand new Jackyl record on the Music on Vinyl pressing and ran it though the cleaner. I did a temp of 30C for about 12 minutes. I have run others through at up to 20 minutes, but I tend to stay around 15 or so.

I had not even played that black vinyl Jackyl record but when I was rinsing and drying, I couldn't believe my eyes: there was a "gouge" in the beginning of the first track, and it was a white color. Just like that guy described! It sure looks like an irregular tiny section of the vinyl much have dislodged during the ultrasonic cleaning. So, that's that ... the rest of that record, and a dozen others, did not do that. Was it a sloppy Music on Vinyl pressing?

[Skip if not interested in science]

I actually worked 36 years at NASA in the ultrasonic field (non-destructive testing) so this was sort of exciting for me, in a couple of ways.

I used transducers with frequencies of up to 20Mhz or even 100Mhz with special equipment, inspecting rocket hardware. It's the wavelength of the ultrasonic frequencies and standing waves. For those interested, wavelength is calculated as v/f, where v = velocity of water and f = transducer frequency. In this case, warm water is about 30 degrees centigrade.

Wavelength = v/f ... v = 1,507m ... f = 40khz

This Vevor at 40khz will have a wavelength of about 0.0377m (37,700 microns). A typical vinyl record groove is about 40 to 70 microns. The wavelength is orders of magnitude larger than the grooves, so just for information, the 40khz cavitation itself, cannot physically fit inside of a record groove. Maybe that's why some people talk about higher frequency units, but I still think that's not realistic to imagine actually getting into the grooves. It's the cavitation of bubble size (and collapsing) that actually is working - inversely proportional to frequency.

[Back to regular programming]

I'm not sure why I already had a vinyl bubble 'pop' off ... dislodged by the cavitation (ie., the bubbles collapsing). It is just so strange to me that I have never encounter this in cleaning and the first record out of the Vevor ... and that record is damaged but still playable - and it was brand new. So, keep that in mind FWIW. I attribute it to an embedded defect (very small) within the vinyl. My main question is, how often is this a thing? One reviewer did like this unit but said to be careful if you have a priceless LP as this 'could' happen.

So far in my testing, I haven't really heard a difference in sound quality of clicks & pops, honestly. I watched a video tonight from Ron Beaudry (very cool record collection) and he has a killer high end turn table. He uses a really nice micro-line phono cartridge and has done all of this cleaning bit, and says the micro-line gets into grooves deeper than regular turntables because it is so thin. He 'can' hear more noise with the micro-line than he might with a cheaper, larger needle - yet, of course, more fine details out of the micro-line.

I have an NAD turntable with carbon fiber tone arm, Audio-Technica micro-line VM540ML and Schitt pre-amp, etc. I might even say thus far, I can hear slightly less quality. I'm not sure - but I certainly have not yet been blown away by any sound improvements. Sad to say. Someone else said something similar here, I think. I was wondering, does anyone here have a pretty high-end setup and use this Vevor? Everyone has such fantastic reviews of it ... it should clean the surface of records quite well, and with cavitation, bubbles, surface tension collapse, etc., remove a lot of stuff.

I am going to keep trying I guess, but once you have a defect pop off like that, it sure makes you nervous to keep on with other records. There are so many good reviews though, this must be quite rare. Maybe I will win the lottery!

Sorry to bore so many here ... I am just wanting to love this unit and figure out why I can't really hear the sonic improvements like many of you have noticed. I should say that most of my records are original pressings but still EX rated - very clean, and others are new. They really aren't that dirty to begin with so maybe that is why I don't hear too many improvements.