- High efficiency headphones, used by airline pilots
- Monaural
- Circumaural ear cushions and padded, well constructed earpiece
- 9 ohms impedance
- Frequency response rated at 100 to 5500 Hz
- 1 milliwatt produces 105 dB sound pressure level at 1 KHz
- Noise reduction rating is 24
- Net weight, 445 grams
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- Monaural or stereo, with 2 way switch selector
- Circumaural ear cushions and padded headpiece for long-term comfort
- 8 ohms impedance
- Frequency response rated at 30 to 18 KHz
- Maximum power input of 500 milliwatts
- Individual volume control for each ear
- Net weight, 300 grams
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