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Re: my ht, and my problem
These ground loops can be a pain. In nearly every case, a simple three-prong to two-prong AC adaptor will fix it. There are no metal parts on the outside of a subwoofer, and many of them use only two-prong plugs to begin with. That is where I would first try the adaptor. Since your projector is most likely out of reach, you could try putting the adaptor there, too.
If you have an irrational fear of ungrounded devices, you could rewire the projector's ceiling outlet to the outlet in the closet - seeing as how that worked in temp mode!
If manufacturers would keep signal ground and safety ground separate, we would never have this trouble.
--ignore the man behind the curtain
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