Superlux CMH8A User Manual

Specifications

JUST PLAY IT

CMH8C 8B 8ACMH8C 8B 8A

Large-diaphragm

Condenser Microphone

User Guide

GOANG-FANNCO.,LTD.

2008, SUPERLUX Inc.

Type

Condenser Microphone

Element

Pressure gradient,
FET preamplifier

Polar pattern

CMH8A/CMH8B:
Cardioid (Figure 1)
CMH8C: Cardioid / /

Omnidirectional

Figure 8

(Figure 2)

Frequency response

30 to 20,000 Hz (Figure 3)

Sensitivity

(at 1,000 Hz Open Circuit Voltage)

CMH8A/CMH8B:

-34dBV/Pa (20mV/Pa)
CMH8C:
Cardioid: -31dBV/Pa (28mV/Pa)
Figure 8: -35dBV/Pa (17mV/Pa)
Omni.: -35dBV/Pa (17mV/Pa)
1Pa=94dB SPL

Rated impedance

200Ω

Minimum load impedance

1000Ω

Equivalent noise level

(A-weighted)

CMH8A/CMH8B: 18dB
CMH8C:
Cardioid: 14dB
Figure 8: 18dB
Omni.: 18dB

Max. SPL

(1 k load)Ω

CMH8A: 132dB SPL
CMH8B: 142dB SPL
CMH8C:
Cardioid: 138dB SPL
Figure 8: 142dB SPL
Omni.: 142dB SPL
(THD 0.5% 1kHz)≦

Dynamic range

at 1 k LoadΩ

CMH8A: 114dB
CMH8B/CMH8C: 124dB

Power supply

48 Vdc phantom power

Current consumption

CMH8A/CMH8B: 2.7mA
CMH8C: 4mA

Polarity

Pin 2 output positive voltage
(related to pin 3) when diaphragm
receives positive pressure.
(Diaphragm moving inward)

Connector

3 pin male XLR type

Finish

Champagne finish

Dimensions

Φ54.0mm(2.13in.) X 209.0mm
(8.23in.) (Figure 4)

Net weight

CMH8A/CMH8B: 550g(19.40oz.)
CMH8C: 565g(19.93oz.)

TYPICAL POLARPATTERN igure 1(F )

CARDIOID TYPICALPOLAR PATTERN

CMH8C Omni

TYPICAL POLARPATTERN

dB

10

0

-10

-20

RELATIVE RESPONSEIN dB

20 50 100 200 500 1000 2000 5000 10000 20000 Hz

dB

10

0

-10

-20

RELATIVE RESPONSEIN dB

20 50 100 200 500 1000 2000 5000 10000 20000 Hz

dB

10

0

-10

-20

RELATIVE RESPONSEIN dB

20 50 100 200 500 1000 2000 5000 10000 20000 Hz

TYPICAL FREQUENCYRESPONSE (Figure 3)

CMH8A/H8B

CMH8C

(Figure 2)

FREQUENCY INHz

FREQUENCY INHz

FREQUENCY INHz

CMH8C Figure 8

TYPICAL POLARPATTERN

CM-H8A

CM-H8B

CM-H8C

(Figure 4)

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.

Features

·

Large-diaphragm capsule of gold-evaporated membrane 1" in
diameter and 3 m in thickness.

·

Low-noise transformer circuit.

·

Wide frequency response.

CMH8A has built-in low-cut filter.

·

CMH8B

·

CMH8C

·

cut filter and -10dB roll-off. At the back ofthe body, there is a switch
for converting polarpatterns among cardioid, figure-of-8 andomni.

μ

has an extezrnal switch for low-cut filter and -10dB roll-off.

has a dual-membrane capsule with external switches for low-

Converting

polar patterns

H8C

Low Frequency

Off-Roll

H8B H8C

-10dB PAD

H8B H8C

Package

Large crash-proof carrying case ---------- -------- A3 carrying case---

Accessories

Supplied accessories

Standard rotatable connector ------------------- ------------ HM8
Metal screw adaptor ----------------------------- ----------- YA1

A3

Carrying case

HM8 Rotatable

connector

Optional accessories

Phantom power supply ------------------------------------- PS2A
Windscreen foam ------------------------------------------- S65
Shock mount ----------------------------------------------- HM7
Desk holder ------------------------------------------------- HM48B
Desk holder ------------------------------------------------ HM58B

--

--

YA1 screw

adaptor

Knowing your microphone

Superlux provides variety selection of microphones for professionals and amatures. To
know your microphone is the first step to successful result.

Type of transducer

Condenser

Extremely light weight diaphragm, very sensitive to sound. Very small versions
available for hiding applications. High performance condenser microphones are
regarded as standard equipment of recording studios for extreme detail capturing.
Operates with power, such as phantom or battery.

Powering microphone

Condenser microphones work with power. Professional standard is 48VDC phantom
power. Some microphones work with lower voltage as low as 1.5VDC, such as battery
power model. CMH8C/B/A work with 48VDC phantom only. Please make sure your
sound system provide adaquate power to the microphone.

About Frequency Response

Flat

Suitable for working at controlled environment, or for acoustic measurements.
Although people persuit flatness, but for none-professionals, it is a challenge to makes
it works asexpectation.

Popular cur ve response

Based on years of practical experience of pro users. There are curves to be build for
various applications, so that it is very simple to use the microphone for the purpose.
Limiting bandwidth, andemphasing are typical skill.

Cardioid

Picks up most signal on axis. Rejects side and picks up least to the back. Suitable for
live sound re-inforcement. Apparent proximity effect and most singer likes to take this
bass boost advantageswhich is notgood for speech.

Figure 8, bi-directional

Equal sensitive to both ends, and rejects the sides. Good to noisy environment to reject
distant noise and low frequency. Also a good choice for stereo recordings, such as
Blumlein. Typical pressure gradient characteristic.

CMH8C polar variation

Double diaphragm structure with cardioid acoustic nature, CMH8C can be set at OMNI,
Cardioid, and Figure-8 polar mode.

Distance to source

Close miking or distant miking sound very differently. Vocal recording or live
performance practice close miking mostly. Suitable proximity effect is one desired
target, and lower feedback problemis another factorfor live soundapplication.

While distant miking is common practice for recording, especially stereo pair
recording withlarge groupof performers, suchas orchestra or choir.

Distant miking generally picks up less bass section with pressure gradient type of
microphone (cardioid, figure-8, shotgun...) due to acoustic nature and lack of
proximity effects.

Rich bass with distant miking can be recorded with pressure type of microphone
(Omni), which performsthe same frequency response with close or distant pick-up.

PS2A

Phantom

power supply

HM48B

Desktop holder

S65

Windscreen foam

HM7

Shock mount

HM58B

Desktop holder

Variable response

Incorporating switchable filters to elliminates interference, such as sub-sonic filter to
cut air-conditioner and floor vibrations. And allows full flat when used in controlled
environment.

Directivity

Select or set the directivity of your microphone for stereo recording, for various music
instrument, vocal, speech, and environmental sound pick-up. Pair of spaced omni for
A/B stereo, pair of near coincident cardioid for ORTF, and pair of coincident XY for
Blumlein stereo.

Omni

directivity Equal sensitivity to all direction, so that the microphone doesn’t need to
point toward the sound source. It’s low handling and wind noise are welcomed by news
gathering and musicrecording applications.

Mounting the microphone

Pressure gradient microphone is very sensitive to vibration. Suitable shock mount for
high performance microphone is necessary for extreme low noise recording. Sturdy
stand can set the microphone excatly at the sweet spot and keep it there. Choose heavy
duty microphone stand for studio condenser microphone which weights much more
than handle microphone.

Superlux provides wide range of microphone stands for various demands. Big Foot
Willie is specially developed for large condenser microphones that able to support 2
large microphoneswith stereo bracket for single point stereo recording.

Extension foot on all the 'E' versions serve to mount heavy studio microphone in limit
space live soundapplications.

Maintainence

Condenser microphone shall be kept in low humidity environment for best sound
performance. Store the condenser microphones in airconditioned room or dehumidifier
to keep away form moisture. Clean air is another important factor. Keep away from
smoking environment to avoid tar residuals.

PRO AUDIO

GF

Shanghai Shenzhen Taipei••

GOANG-FANN CO.,LTD.

3F, No.7,Alley2, Lane 342, Fu-Der 1st Road
Hsichih, Taipei,Taiwan

Tel [phone]:
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E-mail [e-mail]:
Http://www.superlux.com.tw