KEY FEATURES
• Ideal Choir Microphone
• Wide Frequency Response
• Controlled Cardioid Polar
• Back Electret Element
• Ultra Stable Cable
• Phantom Powerable

PRIMARY SPECIFICATIONS

Generation Element: Condenser, back
electret
Frequency Response: 30 Hz to 20000 Hz
Polar Pattern: Cardioid
Open Circuit Voltage: 30 mv/pascal @ 1kHz
Sensutivity: -21.7 dB @ 1 kHz
(0 dB =I mW/pascal)
Equivalent Noise: 22 dB SPL
(OdB=.0002dynes/cmZ)
Dynamic Range: 105 dB
Output Impedance: 150 Ohms @ I kHz
Power Requirements: 12 to 52 Vdc phantom Current Consumption: 2.1 mA
Switchable
Low-Frequency
Response: Flat or Rolloff
(fo=75 Hz, 12 dB/octave)
Color
AL15A/CMB: Non-reflecting Black AL15A/CMW: White

The ALTEC LANSING AL15A/CMB and AL15A/CMW choir microphones are ideal for use in all situations where sound reinforcement of choirs, instrumental and vocal groups are required. They are phantom-powered "back-electret" condenser microphones with high sensitivity, wide frequency response and precisely control led cardioid polar pattern. The units are designed to be easily mounted to either a standard electrical switch box or 4 inch electrical box.

The ALISA/CMB and ALlSA/CMW are furnished with thirty feet of miniature braided shielded cable. The designof the cable insures microphone stability without fishline tethering. Positioning the microphone over a choir, stage, or orchestra is easily done with the supplied wire hanger. A low-frequency roll-off switch is provided in the electronics module to control ceiling rumble from air moving equipment. The electronics module output is terminated in an terminal
block providing a simple cost effective connection. The electronic's output design employs a special hum-bucking transformer to reduce magnetic pickup from lighting or electrical power sources. The low output impedance allows use with very long cable runs.