Technical Data Sheet Model 5x5 Pro III Headset General Description The Telex Model 5x5 Pro III is a lightweight, single-sided, aviation headset. It features an eartip-style receiver, which provides better speech intelligibility than an earmuff-style headset in quiet to moderately noisy environments. It also features a detachable headband for optional wearing configurations using eyeglasses or a custom earmold. The headset is approved for aviation use under FAA (Federal Aviation Agency) TSO C57 and C58a. Design Features Receiver and Eartip A magnetic receiver element is used. Sound is conducted from the receiver to the ear via a flexible vinyl tube terminated with a removable soft plastic eartip. The eartip fits in the ear canal of the wearer. Three eartip sizes are included with the headset to accommodate various ear canal sizes Microphone and Amplifier A noise cancelling, electret element and microphone amplifier are used. The amplifier receives power from the aircraft radio via the microphone plug. The amplifier output level is adjustable through an opening in the side of the amplifier housing. (Adjustment by a qualified avionics technician is recommended.) For best performance the microphone should be positioned at the side of the mouth and close to the lower lip. The headband consists of two stainless-steel springs covered with soft, polypropylene webbing. The springs are bendable to adjust the lateral pressure on the head. Also, the distance between the springs may be adjusted for optimum load distribution and wearer comfort. The headpads are mounted on adjustable stainless-steel sliders. The headpad cushions are soft polyesterurethane foam, and are adhesive-backed for easy field replacement. Wearer Options The headset features a detachable headband and pivot assembly. The boom may be rotated over a 180-degree range, permitting the microphone to be positioned on either side of the head. Alternately, the headband may be removed, and the headset may be worn on eyeglasses. An eyeglass adapter kit is supplied with the headset, and can accommodate wire or plastic eyeglass bows. The headset may also be worn with a custom earmold (not supplied). The microphone boom may be positioned on either side of the head when using eyeglasses or a custom earmold. EYEGLASS TEMPLE (INSIDE VIEW) HEADSET (INSIDE VIEW) Mounting Configurations © Bosch Security Systems, Inc. 2009

Wiring Diagram Specifications Receiver Type: Magnetic Frequency Response: 100-3000Hz Sensitivity: 119dB SPL nominal (1mW at 1kHz input) Matching Impedance; 150-600 Ohms Microphone and Amplifier (Provides carbon equivalent output) Element Type: Noise-cancelling electret Frequency Response: 300-5000Hz Sensitivity: -48dB nominal (ref: 1V/pbar at 1kHz) with test circuit Matching Impedance: 50-600 Ohms Operating Voltage: 8-16Vdc Cordage Style: Y-cord Length: 6ft. (1.8m) Microphone Plug: PJ-068 equivalent Receiver Plug: PJ-055 equivalent Weight With Headband: 4.3oz (121g) Without Headband: 2.5oz (69g) NOTE: When...