Loud humming from LX2

Yes - breaks the ground loop without lifting the ground (at least that is what they claim).

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I took a look and watched some of the videos.

I think this seems to eliminate the “loop antenna” hum that enters through cabling in the front end of the amp. But I’m not sure exactly. They say it does not help with 60Hz hum. So I’m quite confused.

I can’t say I understand either, but it does work. The hum was never really a big issue, even at gig volumes >100db FWIW.