AKG MB3 Bedienungsanleitung
Seiten 2 Engels Mikrofon
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T
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-ole, circular micpr
permanently installs
into a hole drilled ain
table, lectern, ceiling.or
Thanks its supertocardioid pickup pattern, the
MB 3 greatly reduces ambient noise and
pickup room reverberation. e result aofThis
clearer, re intelligible sound.mo
Oe bottom of e mic is a tubulapower n ththr
module with a 3-pin XLR-type output connec-
tor. It is powered b-phantom power, y 1248V
anhad s a low-impedance balanced mic-level
output.
Features
•
Small, inconspicuous.
•
Installs permanently table top, wall inor
ceiling.
•
Clean, clear, natural sound.
•
Low-Z balanced mic-level output prevents
huanm d high-frequency loss.
Specifications
Type:
Phase Coherent rdioid.Ca
Element:
Electret condenser.
Frequency response (typical):
50 Hz 15,000 Hz toat
30 degrees incidence rface (see Fig. 1).tosu
Polar pattern:
Half-superrdioid (superrdioid cacain
the hemisphe above rethe primary boundary).
See
Figs. 2 and 3.
Impedance:
150 ohms, balanced (recommended
load impedance 1000 ohms or greater).
Fig. 1
+15
+10
+5
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 sideopeon
of e base, then ththe 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
201001K 10K
Frequency inHz
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.reno
4. Allow completely dry.to
5. Make sure the D LEis 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, oneinofeacor
between every two people.
Lecterns:
If the microphone will be used on a
typical dB=0.0002 dyne/cm(0
2
), A-weighted.
S/N ratio:
72 dB at dB SPL.94
Maximum : SPL
120 dB L at SP3% THD.
Polarity:
Positive (inward) pressure on the
diaphragm produces positive voltage on n 2pi
with respect n topi3.
Operating voltage:
Phantom power, -48 volts 12DC
on pins 2 d 3 with respect n 1 output antopiof
connector.
Current drain:
4 mA nominal.
Connector:
3-pin pro audio, XLR-M type.
Cable:
None supplied. e Ustwo-conductor shielded
mic cable.
Materials:
High-impact molded plastic d steelan
mesh mic grillesteechassis., 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 notitonsu
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, inth
use as w mics as possible, d t them feanpuin
front of peoplspeakingthe e —not directly
overhead.
Note:
The system gain-before-feedback may
not be adequate ceiling mount applications in
because mic is r from its user.e thfa
Optional accessories :
PH1A phantom power
supply channel, battery -adapter(1orDC
powered). 4A phantom power supply PH(4
channels, AC powered).
*1 pascal = 1dynes/cm0
2
= 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˚
Produktspezifikationen
| Marke: | AKG |
| Kategorie: | Mikrofon |
| Modell: | MB3 |
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