David Clark 9100 SERIES, Maintenance Manual

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HEADSETS
Proper Fit and Adjustment
Proper fit of your headset is critical to both its communication performance and noise
attenuation effectiveness (latter is not applicable to single-ear models). Consult the instructions
below for proper fit.
Over-The-Head Styles (H9130, H9180, H9190)
For models worn over-the-head, first open the headband adjustment all the way and fit the
headset over your ears. Push the headband down until the headpad (headband) rests
comfortably on top of your head. Move the earcups slightly up or down or from side to side until
you feel you have maximum attenuation
(See Figure 1)
Figure 1: Headset Donning
– OTH Style