Here's a Sennheiser BlackFire 521 Dynamic Microphone from the 1990's! Sennheiser's "BlackFire" line was a marketing strategy used by Sennheiser for sleek and simple designs with a matte black finish for broadcasting uses. The 521 is exactly the same as a MD421 except it lacks a bass roll-off switch. The 421 has been used since the 1960's for vocals, guitar amps, toms, other drum uses, etc. The classic microphones have stood the test of time and work great for a variety of different studio uses. This 521 is a clean example and works perfectly with its full frequency response. A non-original mount will be included! Grab this 521 "BlackFire" version of the classic MD421 from Sennheiser!