I have the Klaudio cleaner and have had no problem with loss of HF. The machine itself is a little noisy, but Klaudio makes a noise reduction cabinet for it which works quite well.
Ultrasonic cleaning with kirmuss and loss of high frequency details.
I just purchased the kirmuss US machine and diligently followed their instructions to cycle through minimum 3 cleanings of 5 min each with their surfactant applied each time. Upon testing my favorite vinyl and critically listening through my headphones I am convinced I’ve lost high frequency details. My background is completely silent and ticks and pops have been reduced by 95% or more. So cleaning wise it did the job. Anyone here ever experience loss of high frequency detail after repeated US cleaning? Now I’m worried I permanently damaged my favorite vinyl somehow. Please let me know, thx.