Akg CM311 L Handleiding

Akg Microfoon CM311 L

Lees hieronder de 📖 handleiding in het Nederlandse voor Akg CM311 L (4 pagina's) in de categorie Microfoon. Deze handleiding was nuttig voor 44 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

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CM311 A

CM311 AESH

CM311 L

esigned for touring and live-sound

applications, the AKG/Crown CM311

is a rugged head-worn microphone

with unequalled performance. It sounds like

the best handheld microphones - full,

clear, and distortion-free, even with the

loudest singers.

The CM311 is the latest version of the

AKG/Crown’s proprietary Dieroid ®

technology. Its cardioid pickup pattern

rejects sounds from the rear, such as oor

monitors. Its

noise-cancelling ability rejects

sounds at a

distance, such as instruments

on stage and

crowd noise. This results in

the CM311 having outstanding gain-before-

feedback and isolation.

Lightweight and comfortable, the mic’s

headband and boom adjust to t any singer.

An included pop lter greatly reduces

breath noise and pops. Because of the

boom’s unique behind-the-ear design, it

does not cover up the singer’s face.

Three models are available: CM311 A,

CM311

AESH and CM311 L. The CM311 A is

9 V battery or phantom power.

It has a

battery belt pack with an on/o

switch, a

programmable mic on/o switch,

and a

“Mic On” LED. The CM311 AESH has

a T4AF connector, allowing you to connect with

Shure® wireless systems. The L version offers a

3-pin mini XLR output, which fits all AKG wireless

body-pack transmitters.

How to adjust for best t and to prevent

boom bounce

Note: To get the maximum performance out

of this microphone, take the time to adjust it

to t correctly.

For best results, the CM311 A MUST be

custom tted to a single user’s head. This

simple procedure takes only a few minutes.

Please refer to Fig. 5 and locate the parts

described.

1. If the microphone is for yourself, we

suggest that you use a mirror to double

check the t as you make adjustments.

2. Loosen (just a little) the thumbscrew

located on the outside of the foam block,

part way back on the boom. This allows the

boom to slide in and out, and to rotate left

and right.

DIFFEROID

HEAD-WORN

CONDENSER MICROPHONE

Specications

Transducer type:

Electret condenser.

Frequency response (typical):

50 Hz to 17,000

(see Fig. 1).

Polar pattern:

Cardioid (see Fig. 2).

Impedance:

CM311 A, 75 ohms balanced. CM311

AESH and CM311 L, 6 kilohms unbalanced.

Recommended load impedance:

CM311 A,

1000 ohms or greater. CM311 AESH and

CM311 L, 10

kilohms.

Open-circuit sensitivity, typical, close-talking:

CM311 A, 4 mV/Pa* (–48 dB re

1V/Pa),

CM311 AESH and CM311 L, 1.25 mV/Pa

(–58 dB re 1V/Pa).

Power sensitivity, typical, close-talking:

CM311 A: – 42.5 dB re 1 mW/Pa*, CM311

AESH and CM311 L:

–71.5 dB re 1 mW/Pa.

Equivalent noise level (self noise):

26 dB

SPL typical (0 dB = 0.0002 dyne/cm2),

A-weighted.

S/N ratio:

68 dB at 94 dB SPL.

Maximum SPL:

CM311 A, 148 dB SPL produces

3% THD. CM311 AESH and CM311 L, 140 dB

SPL with 3V DC, 148 dB SPL with 9V DC.

Operating voltage:

CM311 A, 9 V DC internal

alkaline battery or 18-48 V phantom power.

CM311 AESH and CM311 L, 3-9 V DC from

the transmitter’s

battery.

Polarity:

Positive pressure on diaphragm

produces positive voltage on CM311 A XLR

pin 2 with respect to pin 3, and on CM

311

AESH and CM311 L shield with respect to

white lead.

Current drain:

CM311 A, 6.5 mA nominal.

CM311 AESH and CM311 L, 0.27 mA

nominal.

Battery life:

CM311 A, 85 hours. CM311 AESH

and CM311 L,

approximately equal to

transmitter battery

life.

O

Out

(

Mat

Fini

Dim

Incl

Opt

attenuation:

70 dB.

tpu

t connectors:

CM311 A, 3-pin pro audio

R type). CM311 AESH, TA4F for Shure®

wireless systems

. CM311 L, 3-pin mini XLR.

terials

High-impact plastic mic housing,

bras

s boom, steel wire headband, high-

mpac

t plastic and steel battery pack.

Satin black.

weight:

Head-worn mic, 2.1 oz (61 g).

CM311

A belt pack and battery, 6.1 oz (173g).

mensions

Headband 5.5-inch (13.97 cm)

diamete

r, adjustable. Boom approximately

-inch (17.78 cm) x 3-inch (7.62 cm).

See

Figs. 3 and 4.

ude

d accessories:

Microphone carrying

ase

, WS-6 foam pop lter, clothing clip.

iona

l accessories:

PH-4B phantom power

uppl

y (4 channels, AC powered). PH-1A

phanto

m power supply (1 channel, battery

-adapter powered). WS-14 accessory

windscreen.

asca

l = 10 dynes/cm

= 10 microbars = 94 dB SPL.

Fig. 1

Frequency Response

+15

+10

dB 0

-5

-10

-15

-20

-25

-30

-35

0˚, 1.375"

0˚ 2'

120˚, 2'

20 100 1K

Frequency in Hz

Fig. 3

MIC

Fig. 2

Polar

300˚

270˚

240˚

330˚

0˚

FRON

10K

20K

210˚

REAR

180

Fig. 4

sponse

30˚

60˚

90˚

120˚

150˚

1000 Hz

300 Hz

6000 Hz

Fig. 5

3. Now bend the headband wire to t your

head. Put the foam-block wire behind your

ear. Then you can bend the earpieces to t

snugly around your ears. The back of the

headband should t rmly against the back

of your neck.

4. Next, adjust the foam pad snug against

your head or neck. To do this, bend the wire

that goes into the foam block. CAUTION! Do

not bend the boom itself — just the foam-

block wire. A snug fit of the foam pad pre-

vents boom bounce when you move around.

5. Be sure that the thumbscrew is still loos-

ened a little. Move the boom in or out, and

left or right, to center the mic directly in

front of your lips.

The foam pop filter

should press firmly against the lips.

This

is necessary because the mic cancels

sounds that are not close to it. Also, it keeps

the boom from bouncing. Tighten the

thumbscrew and you’re done.

Once you’ve adjusted the headset, it should

remain in that position - no further adjust-

ments are needed. You can still swing the

mic up or down, away from your lips, if you

don’t want to be heard on the P.A. — or use

the mic on/o switch programmed for

“press o” operation.

After several hours of use, the foam pop

lter can become clogged with moisture,

giving a muled sound. Periodically wash it

in mild detergent and water. The foam pop

lter is held in place by a removable ring.

Additional WS-6 pop lters can be ordered

from AKG’s Parts Department.

How to insert a battery in the CM311 A

belt pack

1. Access the battery by sliding open the

battery cover.

2. Insert a fresh 9V alkaline battery (Mallory

Duracell MN9100 or equivalent) into the

battery tray. The battery cover shows the

correct polarity.

3. Replace the battery cover. To prolong

battery life, turn o the battery switch when

not in use.

If you’re using phantom power, and the

battery switch is on, the battery will take

over automatically if phantom power fails.

After 85 hours of use, or if the sound is

distorted, it’s time to replace the battery.

How to program the mic on/o switch

The mic on/o switch can be programmed to

work in three ways:

Push-on/push-o.

Momentary on.

Momentary o (as supplied).

To change the switch operation, open the belt-

pack case by removing the three screws. Set

the switch as shown below:

The LED lights when the mic is on.

Architects’ and Engineers’ Specications

The microphone shall be the AKG/Crown

Model CM311 A or equivalent. The

microphone shall be a head-worn, noise-

cancelling,

car

axi

hea

thu

pac

per

shie

pho

incl

nec

bat

pha

bat

on/

148

sha

res

dow

Mic

gua

thre

info

erl

con

you

defe

orig

belo

sup

+43

rdioi

d type of electret-condenser design.

microphone shall exhibit excellent o-

response and gain-before-feedback.

microphone shall have an adjustable

adband

, adjustable boom with locking

mbscre

w, and foam pop lter.

l CM311 A shall include a battery belt

. In the CM311 A, a

42-inch,

rmanentl

y attached, two-conductor

elde

d cable shall connect the micro-

e to the belt pack. The belt pack shall

lud

e a 3-pin pro audio (XLR type) con-

cto

l CM311 A shall be powered by a 9 V

ry in the belt pack, or by 18 to 48 V

anto

m power. The belt pack shall have a

ry on/off switch, a programmable mic

o

switch, and a “Mic On” LED.

mina

l open-circuit sensitivity shall be 4

1.2

5 mV/Pa. Maximum SPL shall be

dB SPL for 3% THD. Equivalent noise

all

be 27 dBA nominal. Frequency

ponse

shall be 50 Hz to 17,000 Hz with

uniform

o-axis response, over 20 dB

n at the

rear null. The AKG/Crown

del

CM311 A is specied.

rophone Warranty

G/C

rown professional microphones are

ranteed unconditionally against

lfunction

from any cause for a period of

e years

from date of original purchase.

enclosed warranty sheet for additional

rmation.

vice

e microphone does not function prop-

, check that it is aimed correctly and is

nnecte

d as described in this data sheet.

determine that the microphone product is

ective, return the complete product in its

ginal packaging to one of the addresses

. For further assistance or technical

pport call

the international helpdesk at

3 676 83200 888.

Product specificaties

Merk:	Akg
Categorie:	Microfoon
Model:	CM311 L

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