So I'm bored earlier, wife and kids are out of town for another week, so I end up going back to GC with
my JM-47 and doing an a/b with the GT55. VERY similar tonewise, close to the same tone I would almost venture to say. The differences were very subtle, unlike the very noticeable differences between the GT55, AT4033, and Blue BAby Bottle. The JM47 was a little warmer sounding overall, maybe because of a slightly more audible lower/mid lower reponse, and the GT55 may have been a little more pronounced, and in a good way, in the higher frequencies. Also, like the the AT and Blue, the JM47 was a little hotter. VERY slight differences, though, but I would have to choose the JM47. Anyway, my mic need is audibly clearer as to what I need now. I will continue to use the JM47, but would like to add a different sounding mic such as a tube. I wanted to test the K2, but they couldn't find the power supply at GC. Wanted to hear the GT66 they had in the case but the prongs were damaged on the input. And I guess the GT67 has the polar options that the 66 does not. Still want to hear the TLM103 but don't think that is tube. Anyway, I think I'll save for a decent tube mic to add another tonal option, especially for vocals, but it is not a large priority at this point. From an actually a/b session, thought some people may be interested in what I heard.
FYI, the JM47 I own is black case with green lettering, circa 2002, and is according to PMI the same JM47 currently availabe except for the casing. PMI says there is a new JM47A in the works which will be moderately different than the current model. Anyway, I have heard there are some different incarnations of this mic and wanted to specify which one I used in the comparison.