Crown PZM20R Boundary Microphone

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plugs directly into a phantom power supply providing 12 to 48 volts. The wide range frequency response of the20R 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. SPECIFICATIONS Type Pressure Zone Microphone Element Electret condenser. Frequency response typical 80 Hz to 20 kHz Polar pattern Hemispherical on an infinite plane. Open circuit sensitivity 7 mVPa 43 dB re 1 voltPa. Power sensitivity 43 dB re 1 mWPa. EIA sensitivity 135 dBm. Impedance 240 ohms balanced. Recommended minimum load impedance 1000 ohms. Equivalent noise level 20 dB SPL 0 dB 0.0002 dynecm2, A weighted. SN rati 74 dB at 94 dB SPL. Maximum SPL 150 dB SPL at the microphone produces 3 THD. Polarity Positive p
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