Architects' and Engineers' Specifications for

The microphone shall be a Crown CM-150 or equivalent. It shall be an omnidirectional electret-condenser type powered by 18 to 48V phantom power. Frequency response shall be uniform from 20 Hz to 20 kHz. Open-circuit sensitivity shall be 5.4 mV/Pa. Maximum SPL for 3% THD shall be 127 dB with 48V phantom power. Self noise shall be 26.5 dB SPL A-weighted. Impedance shall be 240 ohms balanced. The microphone shall be compatible with " industry standard calibration. The Crown CM-150 is specified.