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Jessie,

Actually the tendency of manufactures to isolate ground becomes almost common among any more or less serious manufactures nowadays. The main’s ground is so polluted in US hat it is scare… or even dungarees. I remember a few years ago when I was setting up AC polarity for my playback I was measuring some VERY ugly sings on the ground side….

I have my cooper poll drive in backyard but also, and do not try it home; I had a few years ago a period when I was driving the entire single ended system completely flooded. At that time I was e4xremeting with active basing of the cable and I remember I got some very crazy setting. I had for instance a couple weeks the system running 110V in one wire and 220V in other wire… of course completely lifted…. and it was 11 components. It was interesting time…

Anyhow, since it is Lamm ML2 thread I’m jumping off the subject of grounds. The only thing that I would add on the subject of the thread would be that on all 4 of ML2s that I owned removed the input filters filters. Vladimir used in ML2 power entry modules that combined fuse, power receptacles and common mode rejection filters. What I did was broken off the filters from the power pins and lifted the ground cable form the unit to the power entry module. It was possible to order to $6 the identical power entry module but I decided do not bother. I personally feel that even the discreet, build with the best possible parts, with the best possible techniques, make to the very specific  and very exact current common-mode and EMI filters do eat dynamic, among the other thighs. However, in the ML2 used $11-worth cheap filter that I thought should be removed. Frankly speaking the effect of removing was much less notable then in some other components (I toss it always everywhere) but it was auditable. Though I admit I do not spent a lot of efforts to confirm it but instead I  juts bite the filter off and forgot about them….

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