Electronics in the base of the 20R adapt the microphone for phantom powering. No external power-supply interface is required. The microphone plugs directly into a phantom power supply providing 12 to 48 volts. The wide-range frequency response of the 20R is emphasized at high frequencies for clarity and articulation. Low frequencies below the voice range are filtered out to reduce rumble.
Three small guard-posts prevent papers from sliding underneath the cantilever arm and altering the frequency response. Like other Pressure Zone Microphones, the 20R utilizes the Pressure Recording Process™ in which a miniature condenser microphone capsule is arranged very close to a sound-reflecting plate or boundary, The capsule is mounted in the “Pressure Zone” just above the boundary, a region where sound coming directly from the sound source combines in-phase with sound reflected off the boundary.
The benefits are a wide, smooth frequency response free of phase interference, excellent clarity and “reach,” a hemispherical polar pattern, and uncolored off-axis response.
The PZM-20R differs from other PZMs in that it is a stationary microphone, generally not moved from one location to another. Before installing it, first check that the pickup will be adequate by testing a regular PZM placed where you plan to install the 20R. Avoid areas where items might be placed on top of the microphone. Once you’ve decided on the microphone position, rout a recessed hole according to the dimensions in Fig. 2B on the reverse side.
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