AUDIO INTERNATIONAL, INC.
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Document #540015, Rev. A, Model No.: EN-B40MT-x & EN-B41MT-x
2.4
Wiring Requirements
2.4.1 The installing agency must supply and fabricate all external cables. The
length and routing of external cables must be carefully studied and
planned before attempting installation of the equipment. Allow adequate
space for installation of cable and connectors. Avoid sharp bends and
placing cables near aircraft control cables. Maintain a minimum clearance
of three (3) inches from any control cable. If wiring is run parallel to
combustible fluid or oxygen lines, maintain a separation of six (6) inches
between the lines.
2.4.2 All signal wires must be 20 AWG minimum, 16-18 AWG preferred. All
audio lines require twisted, shielded cable with the cable shields grounded
at the source. All wires must be in accordance with MIL-W-22759 or
equivalent. Twisted, shielded cable must be in accordance with MIL-W-
27500 or equivalent.
2.5 Physical
Requirements
2.5.1 Do not restrict airflow in front of the enclosure. Airflow should be a
minimum of 70% unrestricted. Heavy fabrics and solid objects can
restrict airflow and damage speaker.
2.5.2 Refer to section 2.7 for pinout and description. Do not drill any additional
holes in the enclosure as it functions as an airtight unit.
2.5.3 Do not remove the speaker from the enclosure; the speaker is sealed in
place to provide optimum performance.
2.5.4 Refer to Section 5.0 for unit dimensions and attachment points.
2.6
Electrical
Connections
2.6.1 Refer to Section 5.0 for electrical specifications.
2.7
Pinouts / Descriptions
EN-B40MT-xx and EN-B41MT-xx pins and descriptions are as follows:
Pin
No.
Description
1
Audio Input Positive
2
Audio Input Negative
2.8
Connector / Mating Connector Information
2.8.1 The enclosure utilizes one of two connectors; a two pin molex or milspec
cannon connector.
