Product Description

The CM-311A offers Differoid performance in a comfortable headworn package. The CM-311A is designed to meet the most demanding touring sound applications, with its electret condenser capsule providing full, clear, and distortion-free sound. Gain-before-feedback and isolation are exceptional. Lightweight, rugged, and comfortable, the headband and mic boom are adjustable to any vocalist. CM-311A includes battery/phantom powered belt pack.

For Wired Applications
Designed for touring and live-sound applications, the Crown(R) CM-311A is a rugged head-worn microphone with unequaled 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(R) 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.

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.

To get the maximum performance out of this microphone, take the time to adjust it to fit correctly. For best results, the CM-311A MUST be custom fitted to a single user's head.

Technical Description

This is NOT a wireless system. It is a headworn microphone with belt pack. The belt pack connects to an XLR cable from your mixer, preamp, etc.

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*
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL

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: 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)
CM-311A 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)

Included Accessories: Microphone carrying case, WS-6 foam pop filter, clothing clip

Optional Accessories: PH-4B phantom power supply (4 channels, AC powered). PH-1A phantom power supply (1 channel, battery or Acadapter powered). WS-14 accessory windscreen

Note: Users with petite heads may have to cut off extra headband material to get the headband to fit properly.

Catalog Description

Headworn condenser mic for crystal-clear sound, hands-free@Connects to included belt pack with XLR output@Cardioid polar pattern

Product Rated 8 Out of 10 (41 ratings)

Read 5 Crown CM311A Headworn Condenser Microphone Full Reviews >>

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