BOOM MICROPHONE POSITIONING AND USE
The SM1 Ultra and SM1x(SR) Ultra are fi tted with fl exible boom microphones that allow 2-way radio
and mobile phone call operation in extreme noise situations. The standard SM1, SM1x and SM1xSR
may be upgraded by purchasing the Ultra Boom Microphone Upgrade – see ACCESSORIES AND
SPARE PARTS. The upgrade kit contains an Allan key, M5 nut and boom clamp.
Remove the rubber microphone attachment cover and attach the boom microphone and clamp as
shown in Figure 3. Lightly tighten M5 screw so that the boom position can just be adjusted by hand.
Place the ear-muffs on the head and adjust the boom position until the end of the microphone is
adjacent to the corner of the mouth. Remove the ear-muffs and tighten the M5 screw using the
Allan key provided, Insert the 2.5mm audio connector into the audio jack.
For optimum use, the boom microphone should be positioned within 5mm of the mouth.
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