Superlux CMH8C, CMH8B, CMH8A, PRO238MKII, CMH8CH User Manual

-10dB PAD

H8B H8C

LowFrequency

Off-Roll

H8B H8C

Converting

polar patterns

H8C

Specifications

Condenser Microphone

Typ e

Pressure gradient,
FET preamplifier

Element

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

(Figure 2)

Figure 8

Omnidirectional

Polar pattern

30 to 20,000 Hz (Figure 3)

Frequency response

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

200Ω

Rated impedance

1000Ω

Minimum load impedance

Equivalent noise level

(A-weighted)

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

Dynamic range

at 1 k LoadΩ

CMH8A: 114dB
CMH8B/CMH8C: 124dB

48 Vdc phantom power

Power supply

Current consumption

CMH8A/CMH8B: 2.7mA
CMH8C: 4mA

Polarity

3 pin male XLR type

Connector

Finish

Dimensions

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

Net weight

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

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 makethem ideal candidate forthe recording of musicprogram.

They are also suitable for general recording, broadcasting, stage

reinforcement, etc.

·

·

·

·

Large-diaphragm capsule of gold-evaporated membrane 1" in
diameter and3 min thickness.

Low-noisetransformer circuit.

Wide frequencyresponse.

has anextezrnal switch forlow-cut filter and -10dB roll-off.

has adual-membrane capsule withexternal switches forlow­cut filterand -10dB roll-off. Atthe back ofthe body, thereis a switch
for convertingpolar patterns amongcardioid, figure-of-8and omni.

μ

·

·

CMH8A has built-in low-cutfilter.

CMH8B

CMH8C

Features

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)≦

CMH8C 8B 8ACMH8C 8B 8A

User Guide

JUST PLAY IT

Large-diaphragm

Condenser Microphone

2008, SUPERLUX Inc.

GOANG-FANNCO.,LTD.

CMH8C

CARDIOID TYPICALPOLAR PATTERN

CMH8C Omni

TYPICAL POLARPATTERN

CMH8C Figure8

TYPICAL POLARPATTERN

(Figure 2)

FREQUENCYIN Hz

CM-H8A

TYPICAL FREQUENCYRESPONSE (Figure 3)

CM-H8B

FREQUENCYIN Hz

CMH8A/H8B

TYPICAL POLARPATTERN igure 1(F )

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

Champagne finish

RELATIVERESPONSE INdB

dB

10

-10

-20

20 50 100 200 500 1000 2000 5000 10000 20000Hz

0

CM-H8C

FREQUENCYIN Hz

RELATIVERESPONSE INdB

dB

10

-10

-20

20 50 100 200 500 1000 2000 5000 10000 20000Hz

0

RELATIVERESPONSE INdB

dB

10

-10

-20

20 50 100 200 500 1000 2000 5000 10000 20000Hz

0

(Figure 4)

PS2A

Phantom

power supply

HM48B

Desktop holder

HM58B

Desktop holder

HM7

Shock mount

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

Accessories

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

--

--

Supplied accessories

Optional accessories

Package

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

A3

Carrying case

HM8 Rotatable

connector

YA1 screw

adaptor

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 orbattery.

Knowing your microphone

Superlux provides variety selection of microphones for professionalsand amatures. To
know your microphoneis the first step tosuccessful result.

Type of transducer

Condenser

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 provideadaquate power to the microphone.

Powering microphone

About Frequency Response

Suitable for working at controlled environment, or for acoustic measurements.
Although people persuitflatness, but for none-professionals, it is achallenge to makes
it works asexpectation.

Flat

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.

Popular curve 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.

Variable response

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.

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

Omni

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 not good forspeech.

Equal sensitive toboth 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. Typicalpressure gradient characteristic.

Double diaphragm structurewith cardioid acoustic nature, CMH8C can be setat OMNI,
Cardioid, andFigure-8 polar mode.

Cardioid

Figure 8, bi-directional

CMH8C polar variation

Distance to source

Mounting the microphone

Maintainence

Close miking or distant miking sound very differently. Vocal recording or live
performance practice close miking mostly. Suitable proximity effect is one desired
target, andlower feedback problem is anotherfactor for live sound application.

While distant miking is common practice for recording, especially stereo pair
recording withlarge group of performers,such as 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 responsewith close or distant pick-up.

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 themicrophone excatly at the sweet spot andkeep 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 singlepoint stereo recording.

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

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

GF

PRO AUDIO

Shanghai Shenzhen Taipei••

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

GOANG-FANN CO.,LTD.

3F,No.7,Alley 2,Lane342, Fu-Der1stRoad
Hsichih,Taipei, Taiwan

S65

Windscreen foam