I too chose the Klaudio machine (no problems heard of from other owners, and nothing more to buy) and am thrilled with the results. I use RO water from my kitchen sink, no additional cost. Dump and refill whenever I think it's time-usually about 50 records. Being located in an adjacent room, I can listen to music while the next LP is being cleaned, a fabulous advantage! And, NO static electricity, major!
I spent half the potential savings on an industrial grade 80 KHz machine, which puts more energy into tiny crevasses (like record grooves). The improvement over the 16.5 is huge - one Archiv record went from unlistenably noisy to averagely quiet.
Can't bear to think of what those (relatively) filthy records were doing to my expensive styli before - but never again.
I do have a sort of DIY ultrasonic cleaner. I don't really know the Hz or how many watts it has. A local ultrasonic manufacture made one for me after I told them how big a bath I want. Basically big enough to submerge the whole LP with label cover. All I know is that it has 4 ultrasonic heads as the guy told me that I would need 4 for the amount of water capacity in the bath. It does a pretty good job in comparison to standard vaccuum machine but still a pain to have to take the LP out and use my record cleaner to dry the LP then use Furutech antistatic fan at the end. For whatever reason, KLaudio unit which arrived a few days ago did a much better cleaning job than my DIY ultrasonic unit in less than half the time and is actually quite a bit more quiet. So my lesson is that not all ultrasonic bath are created equal unfortunately. Now I have a giantic ultrasonic bath that is still really good to clean my glasses and wrist watch strap but not for my LPs anymore :)
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