I lifted this from a datheads post from about 5 years ago. It is answering a question with a question but it does provide some info. Very interesting...hope this sheds a little light.
From: Tom Haughton <unbroken@comcast.net>
Subject: nak. cm-50 info?
Date: Thu, 09 May 2002 21:56:40 -0400
I recently acquired a nak. cm-50 miniature mic w/cp-3 capsule. The capsule
itself measures 1/2" dia. and 17/32" long when removed from the "barrel"
(entire cap/barrel combo is 1 5/16" lg.) I am aware that nakamichi made a
cp-3 capsule, I thought for the cm-300, but that's a larger diameter capsule
than this, is it not? It measures the same diameter as the cp-701 omni cap
for my brother's cm-700s, and would appear to be of that lineage, but I
thought the 700 caps were designated " cp-701, cp-702," etc...It has a 6'
cable from the mic to a combined battery holder/electronic packege/1/4" plug
ass'y...and has a mic clip mounted on a tie clip. It appears for all the
world to be a factory nak stealth mic! I've tested it, and it is certainly a
full-range mic, noticeably warmer and smoother that an a-t stereo mic, the
only thing I have to compare it with, and seemingly an omni cap, though I've
heard the cp-3 cap described as both a hypercardioid and "super-omni
pinpoint" mic...what gives? any help with any of these questions would be greatly appreciated!
Thanks,
Tom