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Fig. 3
Vertical-Plane Polar Response
60˚
90˚
30˚
FRONT
0˚
+
5
–0
–5
–10
–15
–
20
Fig.4a
.974"
.153"
.300"
.379"
.618"
1.981"
.680 DIA.
1.094 DIA.
1.300 DIA.
Fig.4b
1.496" DIA.
(3.8 CM)
.062"
(.2 CM)
1.010"
(2.6 CM)
2.200"
(5.6 CM)
1.130"
(2.9 CM)
1.025" DIA.
(2.6 CM)
1.250" DIA.
(3.2 CM)
Fig.5
BOTTOM VIEW
120˚
PHONE PLUG
1 kHz
200 Hz
5 kHz
150˚
FRONT
REAR
180˚
AFTER REASSEMBLY
RESEAT WASHER
Installation
1. Typical placement for each mic is at full
arm's length from the user. Install one micro-
phone in front of each person, or one between
every two people.
If the microphone will be used on a lectern,
install it on an open surface. Do not install in
a cavity or recessed area as the frequency re-
sponse and polar pattern will be degraded.
2. Drill a hole 1.25-in. (3.175-cm) diameter for
each mic's insert.
3. When you install the insert, make sure that
the locating pin for the microphone is facing
in the desired direction. Orient the mic so the
word "Crown" is readable by the user (right-
side-up).
4. Wire the mic to the MB-100 interface as de-
scribed in the interface data sheet.
5. Plug each mic into its jack. The front of the
mic is indicated by the Crown logo on the mi-
crophone.
6. After use, you may remove the mics and
cover their inserts with the supplied disks.
Architects' and Engineers' Specifi cations
The microphone shall be the Crown model
MB-1 or equivalent. The microphone shall be a
half-supercardioid electret condenser type. The
microphone shall use the principle of phase
coherency achieved by mounting a small-diam-
eter element very near a boundary. This elimi-
nates comb fi ltering in the audible spectrum.
The microphone shall exhibit excellent off-axis
response and gain-before-feedback. Each mic
shall have a bottom-mounted stereo phone
plug.
A table insert with phone jack shall be included.
The mic shall be used with a pluggable terminal
block and an MB-100 interface (not included).
The interface shall provide operating voltage to
each microphone, and convert its output signal
to low-impedance balanced.
Nominal sensitivity shall be 22 mV/Pa. Maxi-
mum SPL shall be 120 dB SPL for 3% THD.
MB-1
MB-1AL
SCREWDRIVER
LIFT WASHER AND
PRY OPEN HERE AND
ON OPPOSITE SIDE
Equivalent noise shall be 22 dBA nominal. Fre-
quency response shall be 50 Hz to 15 kHz with
a uniform off-axis response, about 20 dB down
at the rear nulls.
The Crown models MB-1 and MB-1AL are
specifi ed.
Warranty
Crown professional microphone products are
guaranteed against malfunction for a period
of three years from date of original purchase.
See enclosed warranty sheet for additional
information.
Service
If the microphone does not function properly,
check that it is aimed correctly and is confi g-
ured and connected as described in the MB-
100 interface data sheet. Check the slide-switch
setting in the interface. If there is hum or no
signal, fi rst repair or replace the cable.
If it is determined that the microphone needs
additional service and you wish to return it to
Crown, a Service Return Authorization (SRA)
is required. An SRA can be completed online
at www.crownaudio.com/support/factserv.htm.
After securing an SRA, return the microphone
in its original packaging to: Crown Factory
Service, 1718 W. Mishawaka Road, Elkhart,
IN 46517-9439.
For further assistance or technical support call
800-342-6939.
©2008 Crown Audio
to change without prior notice. Latest information
available at www.crownaudio.com. Mini-Boundary
is a trademark, and Crown and Crown Audio are
registered trademarks of Crown International.
4/08
Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
®
, Inc. Specifi cations subject
103275-7
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