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Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
©
2007 Crown Audio
®
Inc. Specifi cations subject 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. Printed in U.S.A.
10/07 103277-11
MB-3
Fig.5
4. Plug a mic cable with a female 3-pin XLR-
type connector into the mic. Connect the other
end of the cable to a phantom power supply.
Or, if your mixer has phantom power, connect
the mic cable directly to a mic input and turn on
phantom power.
Application
To obtain the clearest sound, connect each MB-
3 to an automatic (gated) microphone mixer.
Adjust the automatic mixer so that it turns off
all mics except for the one in use. One mic by
itself sounds much clearer (less reverberant)
than several mics on at once.
For more application help, see the Crown Micro-
phone Application Guide for Teleconferencing
and Distance Learning, available online at www.
crownaudio.com > Applications > Applications
Guides.
Architects’ and Engineers’ Specifi cations
The microphone shall be the Crown model
MB-3 or equivalent. The microphone shall be a
half-supercardioid electret condenser type. The
microphone shall use the principle of phase co-
herency achieved by mounting a small-diameter
element very near a boundary. This eliminates
comb fi ltering in the audible spectrum.
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
12-48V phantom power.
Nominal sensitivity shall be 22 mV/Pa. Maxi-
mum SPL shall be 120 dB SPL for 3% THD.
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 model MB-3 is 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 informa-
tion.
Fig. 4
Service
If the microphone does not function properly,
check that it is aimed correctly and is con-
nected as described in this data sheet. If there
is hum or no signal, fi rst repair or replace the
cable. A Service Return Authorization (SRA) is
required for product being sent to the factory
for service. A SRA can be completed on line at
www.crownaudio.com/support/factserv.htm. If
service is required, return the microphone in its
original packaging to: Crown Factory Service,
1718 West Mishawaka Road, Elkhart, Indiana
46517-9439.
A Service Return Authorization (SRA) is re-
quired for product being sent to the factory for
service. An SRA can be completed on line at
www.crownaudio.com/support/factserv.htm.
For further assistance or technical support call
800-342-6939.
BOTTOM VIEW
FRONT
Reseat washer
after reassembly.
Screwdriver
Lift washer and pry open
the grille assembly here.
Pull grille assembly up
and over the opposite side.