Audio international EN-650W-01-x User manual

7300 Industry Drive, North Little Rock, AR 72117
Phone: [phone] Fax: [phone]
www.audiointl.com
Installation Manual
EN-650W-01-x
Subwoofer Enclosure
Document # 540246
a DeCrane Aircraft Company

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 1 of 10
Document Revision History
Rev. Level Date Description
IR 05/2002 Initial Release
Reference Documents
Document # Description
523673 Rev IR1 EN-650W-01-x
Service Bulletin List
Service
Bulletin # Subject Manual Revision
Revision
Date
Table of Illustrations
Section # Description Page #
2.2 Block Diagram 4
6.0 Reference Drawings 11-24
PROPRIETARY INFORMATION NOTICE: Despite any other copyright notice, this document
and information disclosed herein contains confidential, proprietary designs owned by Audio
International, Inc. Neither this document nor the data contained herein shall be reproduced,
used, or disclosed to anyone without the written authorization of Audio International, Inc.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 2 of 10
Table of Contents
Section Description Page
1.0 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Purpose of the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Block Diagram - Typical Application. . . . . . . . . . . . . . . . . . . 4
3.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Prior to Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3
Cautions & Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5 Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.6 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.7 Mating Connector Information . . . . . . . . . . . . . . . . . . . . . . . 7
3.8 Pinout Assignments and Descriptions . . . . . . . . . . . . . . . . . 7
3.9 Post Installation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.0 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 General Troubleshooting Procedures . . . . . . . . . . . . . . . . . 8
4.3 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.0 Reference Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 3 of 10
EN-650W-01-x
Subwoofer Enclosure
1.0 General Information
1.1 Introduction
1.1.1 This manual contains information for the proper installation of Audio
International’s (AI) Subwoofer Enclosure, Model # EN-650W-01-x.
Information contained within this publication includes relative
physical, mechanical, and electrical characteristics. The “-x” suffix
in the model number designates the type of connectors utilized; see
Section 3.7, Mating Connector Information, for details.
1.1.2 This speaker enclosure is built to rugged aircraft standards and is
easily incorporated into new or existing systems. Features of this
self-powered unit include lightweight construction, integral mounting
hardware, and the latest in speaker technology.
1.2 Purpose of the Equipment
Audio International’s EN-650W-01-x is a high quality powered subwoofer
speaker enclosure with an 8" driver. This enclosure exhibits excellent low-
frequency response to provide maximum low-end response for a complete
full-range audio system. The EN-650W-01-x is rated at 200 WRMS and is
designed for bulkhead/cabinet installation and to interface with Audio
International’s proprietary RS-485 data bus. The unit utilizes a 12" pigtail
connector.
1.3 Optional Equipment
Audio International, Inc. offers a comprehensive family of Cabin Control
Modules for PC interface. These modules provide convenient solutions
for a variety of frequently encountered interfacing needs or special
requirements and are an important part of AI’s “building block” system for
configuring total cabin management.
Contact your AI representative for details.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 4 of 10
2.0 Application
2.1 Introduction
The EN-650W-01-x is mounted as a single unit. It contains a crossover
network that separates low range (below 175 Hz) audio input. Level
control is a single turn potentiometer to adjust input level. Power input is
115 VAC / 400 Hz; output power is 200 WRMS. This unit comes with
integrated mounting hardware and a ported enclosure.
2.2 Block Diagram -Typical Application
3.0 Installation
3.1 Prior to Installation
The EN-650W-01-x speaker is a simple module to install. Prior to
installation the following items should be considered:
3.1.1 During the design and layout of the aircraft cabin, careful
consideration of the location of this and all other audio/video
modules is necessary. Some of the items to consider include:
• Space
• Proximity to other devices (i.e. source equipment)
• Available power supply
• Length of cable runs
• Environmental conditions (temperature, humidity, etc.)
• Location of other aircraft systems (i.e. oxygen delivery)
• Access for service repair (if applicable)
• Convenience for user interface (if applicable)
3.1.2 The EN-650W-01-x speaker shall be installed to conform to the
standards designated by the customer, installing agency, and
existing conditions as to the unit location and type of installation.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 5 of 10
3.2 Unpacking and Inspection
3.2.1 Carefully open the packaging and remove the speaker. Verify that
all components have been included in the package per the packing
list. Inspect the unit for shipping damage.
3.2.2 If damage has occurred during shipping, a claim should be filed
with Audio International WITHIN 24 hours and a Return Request
Authorization Number shall be obtained from AI. Refer to the
front cover of this manual for address and telephone number of
Audio International, Inc. Repackage the unit in its original
packaging materials and return it to AI following instructions given
by the AI representative. If no return is necessary, retain the
packing list and the packing materials for storage.
3.3 Cautions and Warnings
3.3.1 It is important to do a pin-to-pin power and ground check on all
connectors. Ensure that power and ground are applied only where
specified. Damage to the unit may result if power or ground is
applied to the wrong points.
3.3.2 DO NOT remove any factory-installed screws. Damage to the unit
may result and void any warranties.
3.3.3 DO NOT install near heat sources such as direct sunlight, warm air
exhausts, or heaters.
3.3.4 No scheduled maintenance is required to ensure continued
airworthiness.
3.3.5 ESD (Electro Static Discharge) guidelines shall be followed.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 6 of 10
3.4 Wiring Requirements
3.4.1 The installing agency shall supply and fabricate all external cables
and connectors. Length and routing of external cables should be
carefully planned before attempting installation of the equipment.
Allow adequate space for installation of cable and connectors.
3.4.2 Ensure that all signal wires are 22 AWG. All audio lines require
twisted, shielded cable with the cable shields grounded at the
source. Twisted shielded cable shall be in accordance with the
standard military specification of MIL-DTL-27500 or equivalent.
3.4.3 All power and ground wires shall be 22 AWG, MINIMUM,shielded
twisted pair with the shield properly bonded at one end only. Power
ground wires shall be bonded to electrically conductive chassis
mounting point with <1 Ωresistance or <50 Ωimpedance. Twisted
shielded pair cable shall be in accordance with the standard military
specification of MIL-DTL-27500 or equivalent.
3.5 Physical Characteristics
3.5.1 The speaker shall be located away from heat sources, magnetic
fields, direct sunlight, and areas with excessive dust. The unit shall
NOT be mounted to the skin of the aircraft.
3.5.2 Refer to Section 6.0 for unit dimensions and mounting hole sizes.
3.5.3 The unit shall be rigidly mounted to its location using the
appropriate fastening hardware supplied by the installing agency.
3.5.4 When mounting the unit to the aircraft’s frame, allow sufficient
space for mating connectors.
3.5.5 Do not remove the speaker from the enclosure; the speaker is
sealed in place to provide optimum performance.
3.5.6 Do not restrict airflow in front of the enclosure.
3.6 Electrical Characteristics
Electrical Required Input Power 115 VAC @ 400 Hz
Maximum Power 300 VA
Output Power 200 WRMS
Data Bus Type AI’s proprietary RS-485

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 7 of 10
3.7 Mating Connector Information
EN-650W-01-1 Mating Connector
P1 MS3126F10-6S (ITT Cannon)
P2 RD15F10JVL0 (Positronic)
EN-650W-01-2 Mating Connector
P1 MS3126F10-6S (ITT Cannon)
P2 DAMA-15S (ITT Cannon)
3.8 Pinout Assignment and Descriptions
P1
Pin # Description
1 115 VAC, 400 Hz HOT
2 115 VAC, 400 Hz NEUTRAL
3 AC Ground
4-6 N/C
P2
Pin # Description Pin # Description
1 Audio Input (+) 9 ID 0
2 Audio Input (-) 10 ID 1
3 Audio Input (Shield) 11 ID 2
4 Serial Data Bus A (HI) 12 ID 3
5 Serial Data Bus A (LO) 13 ID Common
6 Reserved 14 Mute Ground Input
7 Reserved 15 Reserved (Ground)
8 Reserved
3.9 Post-Installation Test
Verify all connections to the unit(s) are making contact. With the aircraft
power ON, test the speaker’s performance with any properly connected
audio unit.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 8 of 10
4.0 Troubleshooting
4.1 Introduction
Most functional problems will be detected during the post installation test;
refer to Post-Installation Test, Section 3.9. Once the unit has passed
these tests, it can be functional for many years of service. Most problems
with sound quality are not due to subwoofer performance, but instead are
caused by source equipment or faulty audio material. Always check
source equipment and audio material as well as the speaker in question.
4.2 General Troubleshooting Procedures
• Recheck all connections to the unit for security. Check all harness
runs for possible pinching and all pinouts for application accuracy.
The following troubleshooting procedures apply to the equipment
supplying audio to the subwoofers and not to the subwoofers
themselves.
• Reset by removing power from the unit for at least one (1) minute and
reapply power.
• To verify power to the unit, recheck +28 VDC power is applied to the
proper pins on the unit. Use a voltmeter to verify correct level.
• To check data bus integrity, utilizing a voltmeter, oscilloscope, or other
voltage instrument, verify proper input voltage on the data bus pins.
Typical measurements with no device(s) on bus transmitting are as
follows:
A-to-Ground : 4.0 to 4.5 VDC
B-to-Ground : 0.1 to 1.0 VDC
If any device is transmitting (i.e., holding bus active), then these typical
measurements would be reversed for the A-to-Ground and B-to-
Ground measurements. This troubleshooting tool can help indicate a
data bus lockup. If this occurs, remove the data bus from all other
equipment one piece at a time. As each is removed, check the bus
status to see if it is now functioning properly. Once you have removed
the piece or pieces of offending equipment, disconnect power and then
reconnect everything but the suspect component(s), reapply power
and test the functionality of the unit.
• The RS-485 data bus is a bi-directional bus that does not have a ‘bus
controller’. The bus uses a differential digital signal that will transmit
only when commands are entered via switch selection or other system
synchronizing commands. The “A” leg of the bus is HI and the “B” leg
LOW.

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 9 of 10
4.3 Troubleshooting Chart
Problem Possible Cause Solution
Speaker
produces no
sound
Ø Unit improperly
installed
Ø Source equipment
not loaded with
audio material
Ø Source equipment
not turned on
• Check all connections.
Replace connectors if
required. Verify that source
equipment is installed
correctly.
• Load source equipment with
material.
• Turn on source equipment.
Speaker does not
produce high-
quality sound
Ø Using dirty or
damaged audio
material
Ø Interference from
outside source
Ø System not properly
aligned
• Replace with clean,
undamaged material.
• Run wire away from
interfering sources.
• Correctly realign system.
5.0 Specifications
Physical Specifications
Housing Nomex
Weight 19.58 lb / 8.88 kg
Dimensions
(l x w x h)
16.0" x 9.0" x 12.0"
40.6 cm x 23 cm x 30.5 cm

Audio International, Inc. EN-650W-01-x Installation Manual
Document # 540246, Rev IR, 05/2002 Page 10 of 10
6.0 Reference Drawings
The following diagrams show the unit dimensions, mounting locations, and
connector locations for the EN-650W-01-x.