@hilde45
I know a local tech who contracts to fix them. They come in on a semi-regular basis but I guess people like Italian cars too, so...
intended or not i am not sure, but your post above implies the lampi dacs are somehow unreliable and require repair, like italian sports cars of old
one person’s data point... at present, i am on my 8th lampizator dac (lite 7, amber 3, atlantic, golden atlantic, level g4, level 4 g5, l4 g4+, baltic 3, baltic 4) -- none have had any issues or have needed repair or servicing of any sort (... tube replacements are separate, one sounded better with a stronger rectifier installed and another had tired output tubes that i replaced)
the older lampi’s were hand made, point to point wired, and they (and some of the lower tier newer ones) can sometimes benefit from internal upgrades, most notably going to higher end, pricier coupling caps in the output stages, so i can see how some owners may request that this be done (whether at the factory or within the us by a local qualified tech)
last point - there is this fellow in colorado his link here .. he advertises his service to lampi owners, but i spoke to him, nice enough guy, but he is not connected to nor authorized by lampi in any way to work on their gear - he just owns a baltic and has replaced the wire inside with silver wire etc etc