AKG C451 B by John Eppstein
This is the current model microphone that AKG would sell you as a "451". Aside from being a small diaphragm condenser with a superficially similar appearance it bears little resemblance to the original.
Capsule is fixed in place, noninterchangeable, cardioid pattern only.
3 position pad and 3 position bass rolloff built in. Comes in a nice wooden box with a clip and rather shoddy foam windscreen rather than the wire mesh pop filter of the original. Shockmount available.
This mic is intended for use on all the usual things you'd use an SDC for, overheads, strings, acoustic guitar, snare, etc. The only problem is that compared to the original 451 the sound doesn't really hold up. The mic is a bit harsh and does nasty things to sibilants. The nondetachable cardioid capsule does not compare well to the CK-1 of the original. This is, IMO, another case of a company bringing out a "revival" of a classic but compromising the design to accommodate modern assembly line production. I own one of these and two of the old ones. Guess which one I don't use much?
Understand, this is still a better mic than your average moderately priced SDC condensers. I just don't think it's worth the current new price and I don't consider it to be a "real" C451. I picked up mine used, cheap.