Bose Aviation Headset X Owner's guide - Page 32

TECHNICAL INFORMATION Sound pressure levels (SPL) are relative to 20 micropascals. Headphone Impedance Frequency response Microphone (Electret) Microphone (Dynamic) Maximum ambient noise level Power source Battery life Current Fuse/breaker recommended Damage could occur to avionics equipment that is intended for use only with 600-ohm headsets. If in doubt, consult the avionics equipment manufacturer. Monaural mode: 160 ohms (ON) and 230 ohms (OFF) at 1 kHz Stereo mode: 320 ohms (ON), 460 ohms (OFF) 15 Hz to 15 kHz Sensitivity: 90 dB SPL typical, measured at 1 mw, 1 kHz, full volume on KEMAR ear simulator 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. Impedance: 5 ohm or 150 ohm Sensitivity: Equivalent to M-87/M-101 115 dBC and 105 dBA SPL Battery powered: 2 AA alkaline, IEC LR6 Aircraft powered: 10 to 32 VDC Alkaline: At least 40 hours in typical general aviation aircraft noise. Battery life varies with ambient noise level, temperature, ear cushion condition and age of batteries. Operating: 25 ma in typical aircraft noise 1/4-amp, fast-blow fuse (AGC 1/4-amp fuse) or 1/2-amp circuit breaker 32