RCA 77-DX Ribbon Microphone Pair 1960s Silver / Red Badge

Reverb Estimated Used Price Range

  • $3,000$4,000

The RCA 77-DX is a classic ribbon manufactured from 1955 - 1967 and was a minor update to its predecessor, model 77-D. The DX featured slightly higher average output level, a smaller range of output impedance selections, and a cosmetically different control plate for pattern selection.

Rather than the head basket being open on both sides and symmetrical, the 77-DX has an acoustic labyrinth behind the ribbon element which is rotated by a small flathead driver on the rear of the microphone. This labyrinth variably opens and closes the rear of the mic to create a variety of directional characteristics rather than the bi-directional pattern of most ribbon mics.

A low-frequency rolloff switch sits at the base of the microphone for varying degrees of HPF.

An "umber gray" finished version of the 77-DX was frequently sold to TV stations where the microphone was to blend into the set.

Pricing here reflects a pair of RCA 77-DX microphones.

Notable users: Johnny Cash, Frank Sinatra, Elvis Presley

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