Crown CM312AE

Crown CM312AE

Crown CM312AE Description:

The microphone shall be the Crown model CM-312AE or equivalent. The microphone shall be a head-worn, hypercardioid type of electret-condenser design. The microphone shall exhibit excellent off-axis response and gain-before-feedback. The microphone shall have an adjustable headband, adjustable boom with locking thumbscrew, and a foam pop filter.

Model CM-312AE shall be the head-worn microphone alone. In the CM-312AE, a 45-inch, permanently attached, two-conductor shielded cable can be connected to a transmitter. The CM-312AE shall be powered by 3-9V from a transmitter.

Nominal open0circuit sensitivity shall be 3.8 mV/Pa. Maximum SPL shall be 148 dB SPL for 3% THD. Equivalent noise shall be 31 dBA nominal. Frequency response shall be 50 Hz to 17,000 Hz with a uniform off-axis response, over 20 dB down at the rear nulls. The Crown models CM-312AE is specified.

Crown CM312AE Specifications:

• Transducer type: Electret condenser.
• Frequency response (typical): 50 Hz to 17,000 Hz
• Polar pattern: Hypercardioid
• Impedance: 6 kilohms unbalanced.
• Recommended load impedance: 10 kilohms.
• Open-circuit sensitivity, typical, close-talking: 2.9 mV/Pa (-51 dB re 1V/Pa).
• Power sensitivity, typical, close-talking: -65 dB re 1 mW/Pa.
• Equivalent noise level (self noise): 31 dB SPL typical (0 dB = 0.0002 dyne/cm2), A-weighted.
• S/N ratio: 63 dB at 94 dB SPL.
• Maximum SPL: 148 dB SPL produces 3% THD.
• Operating voltage: 3-9V DC from the transmitter's battery.
• Polarity: white lead with respect to shield.
• Current drain: 0.27 mA nominal.
• Battery life: approximately equal to transmitter battery life.
• Off-attenuation: 70 dB @ 1kHz.
• Output connectors: supply your own to match your transmitter.
• Cables:45-inches long (1.144-m), 2-conductor shielded unbalanced cable, unterminated. In-line with this cable is a small circuit module that equalizes the microphone signal.
• Materials: High-impact plastic and PVC mic housing, brass boom, steel wire headband, high-impact plastic and steel battery pack.
• Finish: Satin black.
• Net weight: belt pack and battery, 6.1 oz (173 g).
• Dimensions: Headband 5.5 in. (13.97 cm) diameter, adjustable. Boom approximately 5.75 in. (14.61 cm).
• Included accessories: Microphone carrying case, WS-7 foam pop fi lter and clothing clip for aerobics.
• Optional accessories: PH-1A phantom power supply (1 channel, battery or AC-adapter powered).

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