Appendix E: Dm1 Microphone Installation; Sequence Of Dm1 And Foam Inserts In Speaker Post Or Menu Board - HME Wireless 6000 Installation Instructions Manual

APPENDIX E: DM1 MICROPHONE INSTALLATION
The following instructions are for installation of the DM1 Microphone in standard, full-duplex
installations, both inside and outside a speaker post or menu board. Specific installation
requirements may vary. Refer to wiring diagrams on pages A-15 and A-16 for cable
connections.
In order to avoid audio feedback, the speaker unit must be mounted at least 2 feet (610 mm) from
the microphone unit. Positioning of the two units is critical. Install the microphone unit before the
speaker unit, so it can be positioned where the customer will be speaking directly into it. The
speaker unit can then be installed anywhere around the microphone unit, as long as they are at least
2 feet (610 mm) apart, center-to-center. This distance may vary according to specific conditions.
NOTE: Try the system with the speaker unit at various locations before permanently mounting it.
If it is not positioned correctly, feedback may occur. If this happens, reposition the speaker at other
locations around the microphone unit until the feedback disappears. If possible, park a vehicle in
front of the post to simulate echo conditions that may also cause feedback.
To Install the DM1 Microphone Inside a Speaker Post or Menu Board
Typical DM1 Microphone installation involves mounting it inside the upper compartment of the SPP2
speaker post. The microphone unit must be mounted against the inside of the speaker grill. The
four enclosed pre-cut foam pieces are made to fit around the DM1 in many types of speaker posts
and menu boards. If the unit must be mounted in a small area, compress the foam when installing it
and closing the speaker post or menu board. In larger areas, additional foam (not supplied) can be
added. To install the DM1 in a typical SPP2 speaker post, refer to Figures E-1 and E-2 and follow
these instructions.
If the DM1 needs to be mounted on top a speaker post or on the outside of a menu board, refer to
sections 2 or3.
Figure E-1. Sequence of DM1 and foam inserts in speaker post or menu board
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