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The microphone that has accompanied us for 10 years in the demo recordings of our vintage saxophones! With the new location and recording booth we need another type of microphone to take better advantage of the space.
What to say about this microphone that is not already known. In perfect condition and full performance!!!
Description:
The RCA type 77-D polidirectional microphone is a high fidelity ribbon microphone. As the name implies, it allows a wide variety of directional patterns to be easily obtained.
Instead of being open on both sides as in the conventional speed microphone, the ribbon element of this microphone is coupled to an acoustic labyrinth, which forms the body part of the microphone. The tube connecting the back of the ribbon to the labyrinth is slotted directly behind the ribbon and equipped with an adjustable shutter to ensure various opening zones. When the aperture is fully closed, the microphone functions as a non-directional pressure microphone; in the fully open position, the microphone becomes bi-directional.
With the proper aperture size, the pattern becomes cardioid by virtue of the phase shift that occurs. Apertures smaller or larger than this critical size produce directional patterns with back lobes of different sizes. Different amounts of low frequency attenuation are obtained by a shunt reactance of the circuit.
