Crown PZM-31S Omnidirectional Boundary Microphone

Crown PZM-31S Omnidirectional Boundary Microphone

The PZM-31S provides a deeper low-end frequency response in an attractive silver finish. as compared to its counterpart the PZM-30GP. Because of the special electret capsule used in the 3 IS, a warmer and smoother high-end sound results. As with all PZ Microphones, the 31S operates on the basis of the Pressure Recording Process'" (see Instruction Manual, Section II). Contrary to conventional microphones, the 31S exhibits a hemispherical response, helping to reduce the number of microphones otherwise needed for wide pick-up situations. In addition, sound sources moving on the surface of sphere surrounding the 31S, will cause no alteration in the quality of the sound.

Specifications:

• Frequency Response: 20Hz-20KHz (frequency response measured with the microphone on a four foot square boundary to allow useful comparison with other Crown PZ M measurements. As with other Crown Pressure Zone Microphones, the response will vary when the microphone is moved from the boundary, or mounted on a boundary with different characteristics).
• Polar Pattern: Hemispherical.
• Electrical Impedance: With the PA-18, PX-18 and PX-T; 150 ohms balanced.
• Normal Loading Impedance: 1000 ohms.
• Signal to Noise: 3% at 150dB-SPL.
• Sensitivity: Open circuit voltage SV -76dB, 0dB=l volt/ micro bar; power level SP -53dBM, 0dBM=l milliwatt/ !Omicrobars; EIA rating GM -148dB, 0dB=EIA standard SE-!05 August, 1949.
• Color: Silver with black trim.
• Dimensions: 5" (12.7cm) by 6" (15.4cm) by .75" (1.9cm).
• Cable Length: Cord from mike to supply is 6 feet.