Crown CM-700 Datasheet

CM-700
T he Crown ® CM-700 is a cardioid con-
denser microphone for pro or semi-pro
recording and high-quality sound reinforce-
ment. Rugged enough for the road, the CM-700 is
well suited for acoustic instruments, drum over-
heads and studio vocals. It works equally well for
popular music (multi-miking) or classical music
(stereo and spot miking). Small and inconspicu-
ous, the CM-700 is also a good choice for miking
a lectern.
The CM-700 has a very smooth, wide-range fre-
quency response which gives it a natural sound.
It preserves the delicate timbre of acoustic instru-
ments, yet it can reproduce all the power of a pipe
organ. The off-axis response is also smooth, so
any leakage picked up has little coloration.
Because of its cardioid pickup pattern, the CM-
700 reduces background noise, room reverb and
feedback. The cardioid pattern is uniform with
frequency.
Self-noise is very low, permitting clean, noise-free
recordings. The mic can handle extremely loud
sounds without distortion. It is protected against
static and RFI. The output is balanced, low imped-
ance, which allows long cable runs without hum
pickup or high-frequency loss. Powering is by
12-48V phantom power.
Several audiophile touches enhance the mic's
pristine sound quality: an ultralight diaphragm,
humbucking transformer, polycarbonate capaci-
tors and a gold-plated 3-pin connector.
The CM-700 has a bass-tilt switch with three posi-
tions: fl at, low-cut and rolloff. An included 2-stage
foam pop fi lter softens breath pops and a foam
windscreen reduces wind noise outdoors.
Operating Instructions
Plug the CM-700 into a phantom power supply or
into a mic input that provides phantom power.
POLAR
PATTERN
CARDIOID
CONDENSER
MICROPHONE
Features
For pro or semi-pro recording
Wide, smooth frequency response provides a
natural, accurate sound quality
Cardioid polar pattern reduces background
noise, room reverb and feedback
Specifi cations
Type: Cardioid condenser.
Transducer: Back electret condenser.
Frequency response (typical): 30 Hz to 20,000 Hz
(see Fig. 1).
Polar pattern: Cardioid (see Fig. 2).
Impedance: 190 ohms, balanced. Recommended
minimum load impedance 1000 ohms.
Open-circuit sensitivity: 2.5 mV/Pa* (–52 dB re
1 V/Pa*).
Power sensitivity: –52 dB re 1 mW/Pa*.
Equivalent noise level (self-noise): 21 dB SPL typi-
cal A-weighted (0 dB=.0002 dyne/cm
S/N ratio: 73 dB at 94 dB SPL.
Maximum SPL for 3% THD: 151 dB with 48V phan-
tom, 142 dB with 12V phantom.
Polarity: Positive pressure on the diaphragm pro-
duces a positive voltage on pin 2 with respect to
pin 3 of the output connector.
Output connector: 3-pin male XLR-type connector.
Switch: Flat, low-cut and bass rolloff.
Operating voltage: Phantom power, 12 to 48 volts
DC, positive voltage on pins 2 and 3 with respect
to pin 1 of output connector.
Current drain: 3.2 mA.
Materials: Rugged steel housing and steel mesh
grille.
Finish: Satin black.
Dimensions: See Fig. 3.
Weight: 4 oz. (113 grams).
Cable: None supplied. Use 2-conductor shielded mic
cable.
Included accessories: Carrying pouch, WS-12 foam
pop fi lter, WS-11 foam windscreen, ASA-4 swivel
mount.
Operating temperature range: –20° to +50° C, or -4°
to +122° F.
Small and inconspicuous
Perfect for acoustic instruments and drums
Rugged enough for the road
Handles extremely loud sounds
Optional accessories: Crown PH-1A phantom
power supply (1 channel, battery or AC pow-
ered), CM-SM isolation shock mount.
*1 pascal = 10 microbars = 10 dynes/cm
SPL.
Fig. 1
Frequency Response
+15
+10
+5
dB 0
FLAT
-5
ROLLOFF
2 -10
).
CUTOFF
-15
-20
-25
-30
-35
20 100
Fig. 2
330°
300°
270°
240°
210°
2 = 94 dB
0° 2 FT.
180° 2 FT.
1K 10K 20K
Frequency in Hz
Polar Response
0° 30°
FRONT
-0
60°
-5
-10
-15
-20
90°
120°
500 Hz-5 kHz
200 Hz
10 kHz
REAR
180° 150°