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Crown CM-311AE

Crown CM-311AE Description:

The CM Series of condenser microphones by Crown offer exceptional quality at truly affordable prices. With application-specific microphones, ranging from professional-grade headworn microphones to critical-response microphones for the most demanding recording applications, the CM Series can fit most any microphone need. Types include hand-held, headworn, hanging, or stand-mounted.

With innovations such as Crown's patented Differoid® technology, the CM series combines years of technical know-how with durable, high-quality materials and workmanship. These qualities are direct contributors to the successful performances of our customers, and a primary reason for the success Crown enjoys today.

Used by world-renowned artists such as Garth Brooks, Britney Spears and Janet Jackson, the Crown CM-311A Differoid microphone is the headworn microphone of choice for the live-performance industry. Featuring clear, crisp vocal performance in a lightweight package, this microphone signifies the quality and performance value of the Crown CM Series of microphones.

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. 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.

Crown CM-311AE Features:

• Two models are available: CM-311A and CM-311AE.
• 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. The CM-311AE is a pig-tail version allowing you to connect it to the wireless transmitter of your choice.
• NOTE: Putting an XLR connector on the CM-311AE and connecting to a mic input with phantom power WILL damage the mic element. For wired applications,
• use the CM-311A.
• How to adjust for best fit and to prevent boom bounce
• Note: 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. This simple procedure takes only a few minutes.
• 1. If the microphone is for yourself, we suggest that you use a mirror to double check the fit as you make adjustments.
• 2. Loosen (just a little) the thumbscrew located on the outside of the foam block, part way back on the boom. This allows the boom to slide in and out, and to rotate left and right.
• 3. Now bend the headband wire to fit your head. Put the foam-block wire behind your ear. Then you can bend the earpieces to fit snugly around your ears. The back of the headband should fit firmly against the back of your neck.

Crown CM-311AE Specifications:

• Transducer type: Electret condenser.
• Frequency response (typical): 50 Hz to 17,000 Hz
• Polar pattern: Cardioid (see Fig. 2).
• Impedance: CM-311A, 75 ohms balanced. CM- 311AE, 6 kilohms unbalanced.
• Recommended load impedance: CM-311A, 1000 ohms or greater. CM-311AE, 10 kilohms.
• Open-circuit sensitivity, typical, close-talking: CM 311A, 4 mV/Pa* (–48 dB re 1V/Pa), CM-311AE, 1.25 mV/Pa (–58 dB re 1V/Pa).
• Power sensitivity, typical, close-talking: CM- 311A: –42.5 dB re 1 mW/Pa*, CM-311AE: –71.5 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: CM-311A, 148 dB SPL produces 3%
• THD. CM-311AE, 140 dB SPL with 3V DC, 148 dB
• SPL with 9V DC.
• Operating voltage: CM-311A, 9V DC internal alkaline battery or 18-48V phantom power. CM- 311AE, 3–9V DC from the transmitter's battery.
• Polarity: Positive pressure on diaphragm produces positive voltage on CM-311A XLR pin 2 with respect to pin 3, and on CM-311AE shield with respect to white lead.
• Current drain: CM-311A, 6.5 mA nominal.
• CM-311AE, 0.27 mA nominal.
• Battery life: CM-311A, 85 hours. CM-311AE, approximately equal to transmitter battery life. Off-attenuation: 70 dB.
• Output connectors: CM-311A, 3-pin pro audio (XLR type). CM-311AE, supply your own to match your transmitter.
• Cables (CM-311A): 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.
• Cable (CM-311AE): In-line with this cable is a small circuit module that equalizes the microphone signal. Cable is 42-inches (106.68 cm) long from headband to module, 12-inches (30.48 cm) from module to cable end. 2-conductor shielded unbalanced cable, unterminated. 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).
• CM-311A
• CM-311AE
• 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. *1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
• Model CM-311A shall include a battery belt pack.
• Model CM-311AE shall be the head-worn microphone alone. In the CM-311A, a 42-inch, permanently attached, two-conductor shielded cable shallconnect the microphone to the belt pack. The belt pack shall include a 3-pin pro audio (XLR type) connector. In the CM-311AE, a 42-inch, permanently attached, two-conductor shielded cable can be connected to a transmitter.
• Model CM-311A shall be powered by a 9V battery in the belt pack, or by 18 to 48V phantom power. The belt pack shall have a battery on/off switch, a programmable mic on/off switch, and a "Mic On" LED.
• Model CM-311AE shall be powered by 3–9V DC from a transmitter. Nominal open-circuit sensitivity shall be 4 or 1.25 mV/Pa. Maximum SPL shall be 148 dB SPL for 3% THD. Equivalent noise shall be 27 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 null. The Crown models CM-311A and CM-311AE are specified.

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