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C649 Condenser Cardioid Microphone

 

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1597B Passive Monitor Panel

DESCRIPTION
The Altec Lansing Model C649 is an electret condenser microphone with studio or broadcast quality for the pickup of speech or music of all types. Its response runs from 40 Hz to 18 kHz, and it will accept an acoustic input signal up to 141 dB-SPL. This means it can be used for pickup of musical instruments of any type, in a band, orchestra, or combo. The bass response is flat when the microphone is used from a distance of 24" (61 cm) or farther; when the microphone is used close to the source there is a bass boost resulting from proximity effect, amounting to 10 dB at 100 Hz with a 3" (7.6 cm) working distance. The D649 has true cardioid coverage, offering excellent rejection of sounds from its rear hemisphere. This can be used to provide a measure of isolation when various choirs of instruments are picked up by different C649s, or when there is reverberation (as in an auditorium) or audience noise (as in a cabaret or dinner theatre).
The Altec Lansing C649 has very high sensitivity ( - 45 dBm output with a 1 Pa wave at the electret element), accepts high inputs (2.24 kPa), has very low internal noise (equivalent to 22 dB-SPL, or 2.5 mPa), and requires 18-50 Vdc phantom power. For this reason we recommend a mixer/ preamplifierwith exceptional dynamic range, low noise, and stable performance.
Wide range . . . high inputs without distortion ... true cardioid pattern . . . the Altec Lansing C649 is your choice to reach out for the music.


SPECIFICATIONS


Element Type: Electret condenser Element Capacitance: 27 pF
Frequency Response: 40 Hz - 18 kHz (See Figure 1)
Pickup Pattern: Cardioid (See Figure 2)
Ideal Application: Recording or enhancedfidelity reinforcement
Load Impedance: 150 ohms .
Output Level: --45 dBm at 1 Pa
E.I.A. Sensitivity
Rating: -137 dB
Signal-to-Noise Ratio: 72 dBA
Dynamic Range: 119 dB
Maximum Input Signal: 141 dB-SPL (re: 20 µPa) Noise Floor: 1.4 µV, A weighted
Equivalent Noise Level: Less than 22 dB-SPL (re: 20 µPa)
Power Required: 18 to 50 Vdc phantom power (no provision for internal battery power), consuming 3 to 12 mA, depending on supply voltage
Case Material: Machined steel
Case Finish: Fawn beige micromatte
Connector Supplied: 3-pin locking, A3M-type, in shank
Polarity: A compression wave at the diaphragm produces a positive voltage at pin 2
Weight: 8 oz. (227 g)
Dimensions: 6.94" (17.6 cm) long
1.06" (2.7 cm) maximum diameter
0.75" (1.9 cm) shank diameter
Included Accessories: 25' (7.6 ml microphone cable, P/N 60-09-124374 Stand adapter

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