Technical Information

Sound pressure levels (SPL) are relative to 20 micro Pascal.

Earphones

Damage could occur to avionics equipment if it was manufactured for use only with 600(ohm) headsets. If in doubt, consult the avionics equipment manufacturer.

Impedance

In mono mode: 480(on) and 190(off) at 1kHz.

In stereo mode: left, 500(on), 190(off); right, 2000(on), 190(off).

Frequency response

20Hz - 15kHz

Sensitivity

90dB SPL measured at 1mW, 1kHz, full volume on flat plate coupler

Microphone

Bias Required:

8 to 16VDC through 220to 2200

Sensitivity:

Depends upon bias and radio AC input impedance. Typical output is 300mV at 114dB SPL. To assure proper modulation of your radio, it is recommended that you have your avionics technician adjust its input to match the output of your headset’s microphone.

Active noise reduction

Active Noise Reduction Bandwidth: 30Hz - 700Hz

Noise floor

28dBA SPL (typical)

Maximum ambient noise level

Approximately 118dB SPL at full cancellation

Voltage

7-32VDC

Current

60mA typical, 120mA maximum operating

Fuse/breaker recommended

1/2 amp fast blow (AGC 1/2 fuse)

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Bose II manual Technical Information

II specifications

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