AKG MB3 Manual

AKG Mikrofon MB3

Læs gratis den danske manual til AKG MB3 (2 sider) i kategorien Mikrofon. Denne vejledning er vurderet som hjælpsom af 21 personer og har en gennemsnitlig bedømmelse på 4.3 stjerner ud af 11 anmeldelser. Har du et spørgsmål om AKG MB3, eller vil du spørge andre brugere om produktet?

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MB3

MINI-BOUNDARY

™

MICROPHONE

he AKG/Crown

MB3 a miniature is

boundary microphone for multi-miking

applications such as teleconferencing,

distance learning, boardrooms,

courtrooms, d security applications. This an

low- ole, circular micpr

permanently installs

into a hole drilled ain

table, lectern, ceiling.or

Thanks its superto cardioid pickup pattern, the

MB 3 greatly reduces ambient noise and

pickup room reverberation. e result aof Th is

clearer, re intelligible sound.mo

O e bottom of e mic is a tubula power n th th r

module with a 3-pin XLR-type output connec-

tor. It is powered b - phantom power, y 12 48V

an had s a low-impedance balanced mic-level

output.

Features

•

Small, inconspicuous.

•

Installs permanently table top, wall in or

ceiling.

•

Clean, clear, natural sound.

•

Low-Z balanced mic-level output prevents

hu anm d high-frequency loss.

Specifications

Type:

Phase Coherent rdioid.Ca

Element:

Electret condenser.

Frequency response (typical):

50 Hz 15,000 Hz to at

30 degrees incidence rface (see Fig. 1).to su

Polar pattern:

Half-super rdioid (super rdioid ca ca in

the hemisphe above re the primary boundary).

See

Figs. 2 and 3.

Impedance:

150 ohms, balanced (recommended

load impedance 1000 ohms or greater).

Fig. 1

+15

+10

dB 0

–5

–10

–15

–20

–25

–30

Frequency Response

0˚

130˚

•

Removable grille assembly n be painted.ca

How to Paint e Microphoneth

1. Using a small screwdriver, pry n e sideope on

of e base, then th the other side (Fig. 5).

Open-circuit sensitivity (typical):

22 mV/Pa* (–33

dB 1 volt/Pa).re

Power sensitivity:

–30.5 dB 1 mW/Pa*. re

EIA rating:

–125 dBm.

Equivalent noise level (self-noise):

22 dB SPL

–35

20 100 1K 10K

Frequency in Hz

Fig. 2

Horizontal-Plane Polar Response

2. Remove the foam liner.

3. Wearing a dust mask, spray-paint the grille

assembly. Be sure grille holes a t clogged.re no

4. Allow completely dry.to

5. Make sure the D LE is properly aligned.

6. Carefully place e grille assembly over theth

base, and snap in place.

Installation

Tables:

In a table, typical placement for each

mic an armis ’s length from e user. Installth

one microphone front h person, onein of eac or

between every two people.

Lecterns:

If the microphone will be used on a

typical dB=0.0002 dyne/cm(0

), A-weighted.

S/N ratio:

72 dB at dB SPL.94

Maximum : SPL

120 dB L at SP 3% THD.

Polarity:

Positive (inward) pressure on the

diaphragm produces positive voltage on n 2pi

with respect n to pi 3.

Operating voltage:

Phantom power, -48 volts 12 DC

on pins 2 d 3 with respect n 1 output an to pi of

connector.

Current drain:

4 mA nominal.

Connector:

3-pin pro audio, XLR-M type.

Cable:

None supplied. e Us two-conductor shielded

mic cable.

Materials:

High-impact molded plastic d steelan

mesh mic grille stee chassis., l

300˚

270˚

240˚

330˚ 0˚ 30˚

FRONT

–0

–5

–10

–15

–20

REAR

1 kHz

200 Hz

5 kHz

60˚

90˚

120˚

lectern, install an open rface. Do notit on su

install in a cavity recessed area as the fre-or

quency response and polar pattern will be

degraded.

Finish:

Satin black.

Net weight:

2.7 ounces (78 grams).

Dimensions :

See Fig. 4.

Fig. 3

210˚ 180˚ 150˚

Ceilings:

When mounting mics e ceiling, in th

use as w mics as possible, d t them fe an pu in

front of peopl speakingthe e —not directly

overhead.

Note:

The system gain-before-feedback may

not be adequate ceiling mount applications in

becaus e mic is r from its user.e th fa

Optional accessories :

PH1A phantom power

supply channel, battery -adapter(1 or DC

powered). 4A phantom power supply PH (4

channels, AC powered).

*1 pascal = 1 dynes/cm0

= 10 microbars = 94 dB SPL.

30˚

0˚

Vertical-Plane Polar Response

60˚ 90˚ 120˚

1 kHz

200 Hz

5 kHz

FRONT REAR

+5 10 15 –0 –5 –––20

150˚

180˚

Fig. 4

Fig.5

FRONT

BOTTOM VIEW

PHONE PLUG

SCREWDRIVER

LIFT WASHER AND

PRY OPEN HERE AND

ON OPPOSITE SIDE

MB3

Nominal sensitivity shall be 22 mV/Pa. Maxi-

mum L shall be 0 dB L for SP 12 SP 3% THD.

Equivalent noise shall be 22 dBA nominal.

Frequency response shall be 50 Hz to 15 kHz

with a uniform off-axis response, t 2abou 0 dB

down at e rear nulls.th

The AKG/Crown model MB3 specied.is

1. Drill a 1.125 . (2.858 cm) diameter hole forin

each mic.

2. Insert e mic tube through e hole. Orientth th

th the mic so e readable label faces the user.

3. Under e table, behind th or the ceiling wall or

panel, slide e ring over th the tube d tighten an

the set screw.

4. Plug a mic cable with a female 3-pin XLR-

type connector into e mic. Connect e other th th

end of e cable th to a phantom power supply. Or,

if your mixer s phantom power, connect theha

AFTER REASSEMBLY

RESEAT WASHER

mic cable directly a mic input d turn to an on

phantom power.

Architects d Engineers Specications ’an ’

The microphone shall be e AKG/Crown model th

MB3 equivalent. or The microphone shall be a

half-super rdioid electret condenser type. Theca

microphone shall e us the principle phaseof

coherency achieved by mounting a small-

diameter element ry near a boundary. This ve

eliminates comb filtering e audible spec- in th

trum.

The microphone will exhibit excellent off-axis

response and gain-before-feedback. The mic

shall have a bottom-mounted 3-pin pro audio

XLR-type male connector. Powering shall be by

12 48- V phantom power.

Warranty

AKG/Crown professional microphone products

are

guaranteed unconditionally against

malfunction

from y cause for a period an of

three years from

date of original purchase. See

enclosed warranty sheet for additional

information.

Service

If e microphone s t function properly, th doe no

check that it is aimed correctly d con-an is

nected as described in this a sheet. theredat If

is m no signal, rst repair replace thehu or or

cable.

If you determine that the microphone product

is defective, return the complete product in its

original packaging to one of the addresses

below For further assistance or technical .

support call

the international helpdesk at

+43 676 83200 888.

VCC

R1 R2

VCC

U1A

C5 R11

MICROPHONE CAPSULE

–

R5 4

C12

VCC

R15

C10

1 2

VCC

C3 R3

U1B

6 – 7

5 +

R10

C7 +

R12

R13

R14

R16

R17

C11

3 A3M

CONNECTOR

INSERT

PINS

MB3 Schematic

MICROPHONE ELECTRONICS

AKG ACOUSTICS GMBH LAXENBURGER STRASSE 254, 1230 VIENNA/AUSTRIA

AKG ACOUSTICS, U.S. SERVICE 24950 GROVE VIEW ROAD MORENO VALLEY, CA 92 , U.S.A , 551

United States and/or other countries.

Features, specications and appearance are subject to change without notice.

www.akg.com

Produkt Specifikationer

Mærke:	AKG
Kategori:	Mikrofon
Model:	MB3

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