Easily some of the most iconic microphones to ever grace this earth, known not only for their bold appearance but also for their classic tonality, the RCA 77-D and 77-DX mics were a staple in the broadcast and recording industry from the 1950s onward and can be found in nearly every major recording facility -- and even in a number of smaller private studios. Used on countless important recordings by the likes of Elvis Presley, Frank Sinatra, Johnny Cash, and a wealth of others, the RCA 77's unique switchable directionality and inviting tone have cemented its place in history as one of the classics and continues to rise in value.