DAVID CLARK COMPANY INC. > HEADSETS - MILITARY > DC H10-66XLPRODUCTS > DAVID CLARK COMPANY INC. > HEADSETS - MILITARY > DC H10-66XL DC Military Headset - MODEL H10-66XL NSN 5965-01-519-6398 Special features: Electronic Noise Cancelling General Aviation NRR: N/A Impedance: Switchable Earphone Type: Dynamic(ENC) Noise-Canceling Mic: M-101Amplified Dynamic or non-amplified Earphone Impedance: Monaural, 150 Ohms nominal, stereo, 300 Ohms nominal per side Mic Impedance: 5 ohms +/- 20% Earphone Sensitivity: 90 dB SPL on flat plate coupler, re 1mW input @ 1KHz Mic Sensitivity: Non-amplified= .07 -.14 mV @ 1khz for 103dB SPL input, or Amplified= 400mV±6dB into 150 ohm load @ 1kHz for 114dB SPL input Earphone Frequency Response: 100-5,500 Hz Mic Freq Response: 300-3000Hz Earphone Plug: U-174/U Mic Plug: U-174/U Boom Type: Patented Flex/Wire Cord: 5 ft.Coil Headpad/Hardware: Super-Soft Headpad,,Lightweight Hardware Weight/Headset Only: 24 oz.