Superlux CMH8C User Manual

J U S T P L A Y I T
CMH8C 8B 8A CMH8C 8B 8A
Large-diaphragm
Condenser Microphone

User Guide

G O A N G - F A N N C O . , L T D .
2008, SUPERLUX Inc.
Specifications
Type
Max. SPL (1 k Ω load)
Condenser Microphone
CMH8A: 132dB SPL
CMH8B: 142dB SPL
Element
CMH8C:
Pressure gradient,
Cardioid: 138dB SPL
FET preamplifier
Figure 8: 142dB SPL
Omni.: 142dB SPL
Polar pattern
≦
(THD 0.5% 1kHz)
CMH8A/CMH8B:
Dynamic range
Cardioid (Figure 1) at 1 k
CMH8C: Cardioid / Figure 8 /
CMH8A: 114dB
Omnidirectional (Figure 2)
CMH8B/CMH8C: 124dB
Frequency response
Power supply
30 to 20,000 Hz (Figure 3) 48 Vdc phantom power
Sensitivity
Current consumption
(at 1,000 Hz Open Circuit Voltage)
CMH8A/CMH8B: 2.7mA
CMH8A/CMH8B:
CMH8C: 4mA
-34dBV/Pa (20mV/Pa)
CMH8C: Polarity
Cardioid: -31dBV/Pa (28mV/Pa)
Pin 2 output positive voltage
Figure 8: -35dBV/Pa (17mV/Pa) (related to pin 3) when diaphragm
receives positive pressure.
Omni.: -35dBV/Pa (17mV/Pa)
(Diaphragm moving inward)
1Pa=94dB SPL
Connector
Rated impedance
3 pin male XLR type
200Ω
Finish
Minimum load impedance
Champagne finish
1000Ω
Dimensions
Equivalent noise level
Φ54.0mm(2.13in.) X 209.0mm
(A-weighted)
(8.23in.) (Figure 4)
CMH8A/CMH8B: 18dB
CMH8C:
Net weight
Cardioid: 14dB
CMH8A/CMH8B: 550g(19.40oz.)
Figure 8: 18dB
CMH8C: 565g(19.93oz.)
Omni.: 18dB
CMH8A/H8B
TYPICAL POLAR PATTERN
Ω Load
CMH8C
CARDIOID TYPICAL POLAR PATTERN
CMH8C Omni
TYPICAL POLAR PATTERN TYPICAL POLAR PATTERN
(Figure 2)
dB
10
0
-10
-20
20 50 100 200 500 1000 2000
FREQUENCY IN Hz
dB
10
0
-10
-20
20 50 100 200 500 1000 2000
FREQUENCY IN Hz
dB
10
0
-10
-20
20 50 100 200 500 1000 2000
FREQUENCY IN Hz
TYPICAL FREQUENCY RESPONSE (Figure 3)
(F igure 1 )
Description
CMH8A/CMH8B are condenser cardioid microphones with large
diaphragm of 1" in diameter; while CMH8C 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.
CMH8C Figure 8
Features
·
Large-diaphragm capsule of gold-evaporated membrane 1" in
μ
CM-H8A diameter and 3 m in thickness.
·
Low-noise transformer circuit.
· Wide frequency response.
·
CMH8A has built-in low-cut filter.
·
5000 10000 20000 Hz
CMH8B has an extezrnal switch for low-cut filter and -10dB roll-off.
CM-H8B
·
CMH8C
has a dual-membrane capsule with external switches 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.
5000 10000 20000 Hz
CM-H8C
Converting
polar patterns
H8C
5000 10000 20000 Hz
(Figure 4)
Low Frequency
Off-Roll -10dB PAD
H8B H8C H8B H8C