AA82 InterMUSIC™ Stereo Intercom System
SM09-1 Installation and Operation Manual
April 16, 2012 Rev: 2.00
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
Setting Up Muting and Music
Rotate the front panel VOX potentiometer until the VOX indicator is off. The music audio can now be
heard. Adjust the music to a comfortable level with the front panel potentiometer. If the music is louder in
one ear than the other, the side panel MUSIC BAL control may need adjusting, although this could be a
problem with your music source, as this adjustment should be correct from the factory.
With the front panel VOX potentiometer turned fully counter-clockwise (LIVE ICS, the indicator should be
ON), adjust the MUSIC MUTE trimpot to the desired level of music audio in the background. This is the
level the music will default to whenever it is muted and can range from OFF to only slightly muted as
Setting Balance and Bass Potentiometers
With the VOX control still in the LIVE ICS position, talk back and forth on the intercom to determine the
voice quality. If more bass is desired, the ICS BASS potentiometer may be adjusted for the preferred
tone. Check that this adjustment is compatible with the headsets and that it does not increase distortion. If
the ICS audio seems distorted, reduce the ICS BASS potentiometer for best results. Some aircraft
headsets do not have very good internal microphone amplifiers and achieve "noise reduction" by shunting
the microphone with a large capacitor to reduce high frequency noise. This may make the voice very bass
heavy and muffled. Best results were obtained in AEM testing with the following headsets:
Bose (may require re-wiring of plug for stereo)
David Clark (may require modification for stereo)
Most aircraft headsets do not do a good job of reproducing wide bandwidth music information, which
seriously compromises the performance of the AA82. AEM will test any headset for system compatibility if
the unit is supplied for evaluation with the AA82.
If you wish the ICS audio to come from a particular location (left to right), adjust the ICS BAL
potentiometer for the desired position.
If you have not controlled the Left/Right headset jack wiring, it may appear to change locations
between different users.
Set the location to suit your preference, listen to an incoming radio transmission and position it (ideally) in
the opposite location with the RX BAL trimpot. The best setup should give some perceived difference in
location for these two sources (radio & ICS), as it will improve recognition of who is speaking in the
Other ICS Functions
Check all installed functions and check the ICS function for all users. The VOX potentiometer on the front
controls all passengers. Adjust as needed for the best performance.
Significantly different headsets may have different microphone characteristics, which affect VOX
The David Clark M-7 microphone is more active than M-4 or M-1 microphones and may
aggravate headset imbalance if used in a mixed system.