Bose X User Manual download pdf (Page 32)

TECHNICAL INFORMATION

Sound pressure levels (SPL) are relative to 20 micropascals.

Headphone Damage could occur to avionics equipment

that is intended for use only with 600-ohm

headsets. If in doubt, consult the avionics

equipment manufacturer.

Impedance Monaural mode: 160 ohms (ON) and 230

ohms (OFF) at 1 kHz

Stereo mode: 320 ohms (ON), 460 ohms (OFF)

Frequency

response

15 Hz to 15 kHz

Sensitivity: 90 dB SPL typical, measured at

1 mw, 1 kHz, full volume on KEMAR ear

simulator

Microphone

(Electret)

Bias required: 8 to 16 VDC through 220 to

2200 ohms

Sensitivity: Varies depending upon bias and

radio AC input impedance. Typical output is

600 mV at 114 dB SPL. To assure proper

modulation of the radio, it is recommended

that an avionics technician adjust its input to

match the output of the microphone.

Microphone

(Dynamic)

Impedance: 5 ohms

Sensitivity: Equivalent to M-87/M-101

Maximum ambi-

ent noise level

115 dBC and 105 dBA SPL

Power source Battery powered: 2 AA alkaline, IEC LR6

Aircraft powered: 10 to 32 VDC

Battery life Alkaline: Up to 40 hours in typical general

aviation aircraft noise. Battery life varies with

ambient noise level, temperature, ear cushion

condition and age of batteries.

Current Operating: 25 ma in typical aircraft noise

Fuse/breaker

recommended

-amp, fast-blow fuse (AGC

-amp fuse) or

-amp circuit breaker

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Bose X User Manual Page 32

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