Specifications

80
Microphones for Close Pickup
CMH 64 CMH 641
Frequency range: 40 Hz – 20 kHz
Sensitivity: 13 mV/Pa 14 mV/Pa
Equivalent noise level: A-weighted*: 15 dB-A 15 dB-A
CCIR**: 24 dB 24 dB
Signal-to-noise ratio (A-weighted*): 79 dB-A 79 dB-A
Maximum SPL: 132 dB (0.5% THD)
Powering: 12 V ± 1 V and 48 V ± 4 V phantom powering (automatically switched)
Current consumption: 12 V: 8 mA, 48 V: 4 mA
Output voltage at maximum SPL: 1 V
Output impedance: 12 V: 25 Ohms, 48 V: 35 Ohms
Minimum recommended load impedance: 600 Ohms
Output connector: XLR-3M
Dimensions in mm: 37 dia., 26 dia. × 210
Weight: 190 g
Frequency response curve CMH 64 U
20 50 100 200 500 1k 2k 5k 10k 20kHz
+10
-10
0dB
-20
Handheld Microphones
CMH 64 U, CMH 641 U
– built-in protection from plosive sounds (“popping”)
and handling noises
With public address systems, acoustic feedback and
”popping” noise are among the most common prob-
lems.
Acoustic feedback
The directionality of the SCHOEPS CMH microphones
reduces the risk of feedback. Using a close-up micro-
phone increases the proportion of direct sound, thus
reducing the risk of feedback. But then the low fre-
quencies of the voice would be unnaturally emphasized
due to ”proximity effect.” Such emphasis is compen-
sated, however, by the low-frequency rolloff of the
CMH microphones.
Popping
The ”popping” effect on spoken consonants is substan-
tially reduced by the built-in pop filter, and is further
reduced by the low-frequency rolloff of the micro-
phone.
Accessories (included):
polished wood case, SGH tapered stand mount.
(The operating angle is adjustable. For 5/8"-27 NS
threads; adapter provided for 3/8" and 1/2" threads;
color: gray)
Accessories (optional):
PS 4 hygiene guard. For hygienic reasons an inter-
changeable thin foam guards is available.
Color: gray
SGH
PS 4
COLETTE
modular
Frequency response curve CMH 641 U
20 50 100 200 500 1k 2k 5k 10k 20kHz
+10
-10
0dB
-20
*IEC 61672-1, **IEC 60268-1