Crown Audio MB-2 Installation, Architects’ and Engineers’ Specifications, Warranty, Service

Fig. 3

Vertical-Plane Polar Response

Fig.4

Dimensions

Fig.5

Installation

1.Typical placement for each mic is at arm’s length from the user. Install one microphone 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 response and polar pattern will be degraded.

2.If you want to flush-mount the jack, counter-

bore a hole 0.625-in. (1.59-cm) diameter, 0.10-in. (0.254-cm) deep. In the center of the counterbore, drill a hole 0.5-in. (1.27-cm) diameter for each mic’s cylindrical phone jack. Insert the jack in the hole and thread on the nut.

If you do not want to flush-mount the jack, drill a hole 0.5-in (1.27-cm) diameter for each mic’s cy- lindrical phone jack. Insert the jack in the hole and thread on the nut.

On the bottom of the MB-2 is a removable 0.0625- in. (0.159-cm) diameter pin to secure the mic in position. Drill a hole for this pin 0.801 in. (2.0345 cm) from the center of the phone-jack hole, in the desired direction.

3.Wire the mic to the MB-100 interface as de- scribed in the interface data sheet.

4.Plug each mic into its jack. Orient the mic so the word “Crown” is readable by the user (right- side-up).

Architects’ and Engineers’ Specifications

The microphone shall be the Crown model MB-2 or equivalent. The microphone shall be a half-super- cardioid electret condenser type. The microphone shall use the principle of phase coherency achieved by mounting a small-diameter element very near

a boundary. This eliminates comb filtering 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.

MB-2

The user shall supply a cylindrical phone jack. 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. Maximum SPL shall be 120 dB SPL for 3% THD. Equivalent noise shall be 22 dBA nominal. Frequency re- sponse 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-2 is specified.

Warranty

Crown professional microphones are guaranteed against malfunction for a period of three years from date of original purchase. See enclosed war- ranty sheet for additional information.

Service

If the microphone does not function properly, check that it is aimed correctly and is configured and connected as described in the MB-100 in- terface data sheet. Check the slide-switch setting in the interface. If there is hum or no signal, first repair or replace the cable.

If you determine the microphone product(s) is defective, return the complete product in its original packaging to: Crown Factory Service, 1718 West Mishawaka Road, Elkhart, IN 46517- 9439. A Service Return Authorization (SRA) is required 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.

Crown International, Inc. 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 TEL: 574-294-8000 FAX: 574-294-8FAX www.crownaudio.com

©2008 Crown Audio®, Inc. Specifications 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.

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