Superlux CMH8CH User Manual
User guide, Cm h8ch 8bh 8ah, Large-diaphragm condenser microphone
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CM
H8CH 8BH 8AH
User Guide
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Large-diaphragm
Condenser Microphone
2007, SUPERLUX I
LB100H8AH01EN (Rev. 1)
nc.
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Specifications
Condenser Microphone
Type
Pressure gradient,
FET preamplifier
Element
CMH8AH/CMH8BH:
Cardioid (Figure 1)
CMH8CH: Cardioid / Figure 8 /
Omnidirectional (Figure 2)
Polar pattern
30 to 20,000 Hz (Figure 3)
Frequency response
Sensitivity
(at 1,000 Hz Open Circuit Voltage)
CMH8AH/CMH8BH:
-34dBV/Pa (20mV/Pa)
CMH8CH:
Cardioid: -31dBV/Pa (28mV/Pa)
Figure 8: -35dBV/Pa (17mV/Pa)
Omni.: -35dBV/Pa (17mV/Pa)
1Pa=94dB SPL
200Ω
Rated impedance
1000Ω
Minimum load impedance
Equivalent noise level
(A-weighted)
CMH8AH/CMH8BH: 18dB
CMH8CH:
Cardioid: 14dB
Figure 8: 18dB
Omni.: 18dB
Dynamic range
at 1 kΩ Load
CMH8AH: 114dB
CMH8BH/CMH8CH: 124dB
48 Vdc phantom power
Power supply
Current consumption
CMH8AH/CMH8BH: 2.7mA
CMH8CH: 4mA
Polarity
3 pin male XLR type
Connector
Black leather finish
Finish
Dimensions
Φ
54.0mm(2.13in.) X 209.0mm
(8.23in.) (Figure 4)
Net weight
CMH8AH/CMH8BH: 550g(19.40oz.)
CMH8CH: 570g(20.11oz.)
Max. SPL
(1 kΩ load)
CMH8AH: 132dB SPL
CMH8BH: 142dB SPL
CMH8CH:
Cardioid: 138dB SPL
Figure 8: 142dB SPL
Omni.: 142dB SPL
(THD≦0.5% 1kHz)
Pin 2 output positive voltage
(related to pin 3) when diaphragm
receives positive pressure.
(Diaphragm moving inward)
2000 Hz
4000 Hz
8000 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
250 Hz
500 Hz
1000 Hz
CMH8CH
CARDIOID TYPICAL POLAR PATTERN
CMH8CH
FIGURE 8
TYPICAL POLAR PATTERN
CMH8CH
OMNI.
TYPICAL POLAR PATTERN
200 Hz
1000 Hz
10000 Hz
1000 Hz
8000 Hz
16000 Hz
2000 Hz
4000 Hz
(Figure 2)
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dB
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-10
-20
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10000
20000 Hz
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CM-H8AH
TYPICAL FREQUENCY RESPONSE (Figure 3)
CM-H8BH
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dB
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-20
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20000 Hz
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Cardioid
Roll-off
-10dB
CM-H8CH
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20000 Hz
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Cardioid
Fig.8
Omni.
Roll-off
-10dB
CMH8AH/H8BH
TYPICAL POLAR PATTERN
igure 1
(F
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-10dB PAD
H8BH H8CH
Low Frequency
Roll-off
H8BH H8CH
Converting
polar patterns
H8CH
Description
CMH8AH/CMH8BH are condenser cardioid microphones with large
diaphragm of 1" in diameter; while CMH8CH features convertible polar
patterns of cardioid, figure-of-8 and omni. Their tailored frequency
response make them ideal candidate for the recording of music program.
They are also suitable for general recording, broadcasting, stage
reinforcement, etc.
! Large-diaphragm capsule of gold-evaporated membrane 1" in
diameter and 3μm in thickness.
! Low-noise transformer circuit.
! Wide frequency response.
! Blue LED light on the front indicating the working condition of the
phantom power supply.
! CMH8AH has an internal low-cut filter switch.
! CMH8BH has an external switch for low-cut filter and -10dB roll-off.
! CMH8CH has a dual-membrane capsule with an external switch for
low-cut filter and -10dB roll-off. At the back of the body, there is a
switch for converting polar patterns among cardioid, figure-of-8 and
omni.
Features
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(Figu re 4)