Yes, a couple of years actually and no regrets whatsoever.............certainly worth the reasonable cost of the changeover. I wouldn't wish to trail off into long descriptive texts. Suffice it to say that the music is just that much more enjoyable to listen to...........in my system the initially most noticible change was in the bottom end - the other improvements seemed to creep up on me and their impact to my listening was not insignificant after a few days. Interestingly, my 17 year old ML2s (which were in perfect nick operationally/cosmetically) were in no way embarrassed by the ML2.2s and with new valves were still magnificent............their new owner certainly seems very pleased.
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