Pro performance under the most demanding conditions.

If you want to maintain eye contact and really play while you sing, the Crown CM-311A Headset Microphone is for you. Electret condenser capsule provides full, clear, distortion-free sound. Gain-before-feedback and isolation are exceptional. Lightweight, rugged, and comfortable, the headband and mic boom are adjustable for any vocalist. Includes a battery/phantom power beltpack.

Designed for touring and live-sound applications, the Crown CM-311A is a rugged head-worn microphone with unequalled performance. It sounds like the best handheld microphones-full, clear, and distortion-free, even with the loudest singers.

The CM-311A is the latest version of the Crown's proprietary Differoid technology. Its cardioid pickup pattern rejects sounds from the rear, such as floor monitors. Its noise-canceling ability rejects sounds at a distance, such as instruments on stage and crowd noise. This results in the CM-311A having outstanding gain-before-feedback and isolation.

Designed for touring and live-sound applications, the Crown CM-311A is a rugged head-worn microphone with unequalled performance. It sounds like the best handheld microphones-full, clear, and distortion-free, even with the loudest singers.

Lightweight and comfortable, the mic's headband and boom adjust to fit any singer. An included pop filter greatly reduces breath noise and pops. Because of the boom's unique behind-the-ear design, it does not cover up the singer's face.

The CM-311A is powered by a 9V battery or phantom power. It has a battery belt pack with an on/off switch, a programmable mic on/off switch, and a "Mic On" LED.

Crown CM-311A Headset Mic With Beltpack Features:

Full, clear, distortion-free sound
Outstanding gain-before-feedback and isolation
Battery/phantom belt pack

Crown CM-311A Headset Mic With Beltpack Specifications:

Transducer type: Electret condenser.
Frequency response (typical): 50 Hz to 17,000 Hz
Polar pattern: Cardioid
Impedance: 75 ohms balanced.
Recommended load impedance:, 1000 ohms or greater.
Open-circuit sensitivity, typical, close-talking: 4 mV/Pa (—48 dB re 1V/Pa.
Power sensitivity, typical, close-talking: 42.5 dB re 1 mW/Pa,
Equivalent noise level (self noise): 26 dB SPL typical (0 dB = 0.0002 dyne/cm2), A-weighted. S/N ratio: 68 dB at 94 dB SPL.
Maximum SPL: 148 dB SPL produces 3% THD.
Operating voltage: 9V DC internal alkaline battery or 18-48V phantom power.
Polarity: Positive pressure on diaphragm produces positive voltage on CM-311A XLR pin 2 with respect to pin 3.
Current drain: 6.5 mA nominal.
Battery life: 85 hours
Off-attenuation: 70 dB.
Output connectors: CM-311A, 3-pin pro audio (XLR type).
Cables): 2-conductor shielded, unbalanced cable, 42-inches (106.68 cm) from headband to battery pack. Use 2-conductor shielded mic cable (not included) between XLR connector and mixer mic input.
Materials: High-impact plastic mic housing, brass boom, steel wire headband, high-impact plastic and steel battery pack.
Finish: Satin black.
Net weight: Head-worn mic, 2.1 oz (61 g). Belt pack and battery, 6.1 oz (173g).
Dimensions: Headband 5.5-in. (13.97 cm) diameter, adjustable. Boom approximately 7 in. (17.78 cm) x 3 in. (7.62 cm). See Figs. 3 and 4.
Included accessories: Microphone carrying case, WS-6 foam pop filter, clothing clip.
Optional accessories: PH-1A phantom power supply (1 channel, AC-adapter powered). WS-14 accessory windscreen.

Crown CM-311A Headset Mic With Beltpack Includes:

Microphone carrying case, WS-6 foam pop filter, clothing clip.