Re: Mics for acoustic instruments
I am currently looking at AKG C451, Neumann KM184, Sennheiser MKH8040.
Around two decades ago, when I still had decent hearing and could hear subtle differences, I auditioned a new AKG C451 (which was my SDC mic of choice for the 15 years prior) to several other small diaphragm mics, and preferred the Audio Technica AT-37. I have been using them ever since on anything from pianos, guitars, drums and percussion, even choirs and orchestras. They work well on everything but kick drums, which can be loud enough to overload them. I bought a pair in 1994, another pair sometime around 2000. The last time I measured their response (2012 IIRC) their response still were very close, much closer than the "babied" C451s I had tested at EV. Unfortunately, the AT37 are too inexpensive to have garnered snob appeal, but I have never had anyone complain about their sound.
Although Neumanns can sound excellent, my experience with their vocal condensers is that after a while of use, no two have the same frequency response, don't know if that same problem holds true with the KM184.
I've sworn off Sennheiser after the last pair of MD421 purchased died after less than a half dozen gigs in front of horns, just out of the 1 year warranty period, and Sennheiser wanted almost the same price as new to fix them.
Hey, if anyone is looking for a Helpinstill piano sensor system, the best sounding way to get pianos above loud bands, I'd be willing to let mine go. The Helpinstill with a SDC for a bit of "air" on top (or when the band would stop being too loud) was always my favorite, though I used to also have some Barcus Berry piano transducers to fulfill riders.
Art