TECHNICAL INFORMATION
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. |
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Impedance | Monaural mode: 160 Ohms ON and OFF |
| Stereo mode: 320 Ohms ON and OFF |
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Frequency response | 15 Hz to 15 kHz |
| Sensitivity: 92 dB SPL typical, measured at 1 mw, |
| 1 kHz, full volume on a KEMAR ear simulator. |
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Microphone (Electret) | Bias required: 8 to 16 VDC through 220 to 2200 Ohms. |
| Sensitivity: Varies depending on bias and AC radio 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 adjusts its input to match the |
| output of the microphone. |
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Microphone (Dynamic) | Impedance: 5 Ohm or 150 Ohm dynamic mic |
| Sensitivity: Equivalent to |
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Maximum ambient noise level | 115 dBC SPL for full active noise reduction performance |
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Power source | |
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Voltage | |
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Battery life | Alkaline battery life: At least 45 hours in typical general |
| aviation aircraft noise. Duration varies with battery age, |
| ambient noise levels, temperature, ear cushion seal, and |
| use of the Bluetooth® feature. |
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Current | Operating: 25 mA in typical aircraft noise |
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Fuse/breaker recommended | 1/4 amp, |
| circuit breaker |
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Headset weight | 12 ounces |
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Headset size range | Slider not extended: |
| 8.425" (214mm) H x 6.34" (161mm) W x 3.15" (80mm) D |
| Slider extended: |
| 10.2" (259mm) H x 6.6" (168mm) W x 3.15" (80mm) D |
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Control module dimensions | 1.5" (38.1mm) H x 1.5" (38.1mm) W x 4.92" (125mm) D |
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Temperature and Altitude | Operating: 5 to 131°F |
(Category A) | Storage: |
| Altitude: 15,000 feet maximum pressure altitude for |
| full cancellation |
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Bluetooth wireless technology | |
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Bluetooth technology QD ID | Bose® A20® Aviation Headset: B016487 |
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