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For simplicity, the electronic box is not visible in the below picture (Picture 4: B2 = Base screw and B3 = Wing
nut). As the electronic box is already screwed to the rear plate, simply screw the remaining part (rear plate -
A4) to the chassis, assembled in the previous step.
2.a Installation of the speaker for AviTrac® 9M and 18M
Make sure the speaker is stabilized on the top of the rear plate (above the central hole, Picture 5) and screw the
screw B2 to wing nut B3 as shown in the illustrations below (Picture 6 and Picture 7). It is advised to make the
speaker cable point downwards in order to reduce the risk of water infiltration into the input sockets.
Picture 5. Hole for speaker on AviTrac® 9M and 18M
Picture 6. Speaker for AviTrac® 9M
Picture 7. Wing nut position and speaker screw
a. Top view, b. Bottom view
Picture 4 Screw the rear plate to the feet and rails