David Clark PRO-X2, GA with Bluetooth

Features: 

• Enhanced Auto-Shutoff feature virtually eliminates accidental loss of battery power
• Automatic Gain Control (AGC) for optimum ANR performance in high noise conditions
• Hybrid Electronic Noise Cancellation with advanced feed-forward and feed-back technology provides best-in-class active noise reduction
• Dual voice coil drivers provide fail safe operation to ensure full communication in the event of battery loss or system failure
• Digital Signal Processing (DSP) ensures high-fidelity audio for superior communications and music listening
• Bluetooth® wireless technology provides seamless integration for connecting to cell phones, MP3, tablets or other personal electronic devices
• Stereo/mono switch
• High performance, electret microphone with enhanced noise cancelling
• Rugged yet lightweight magnesium alloy headband and suspension is adjustable for personalized fit
• Low profile, Outlast® fabric head pad with vented design absorbs excess heat to keep you cool and eliminates 'hot spots'
• Dura-Stitched, leatherette ear seals with slow recovery foam cradle the ears in comfort and eliminate heat buildup
• Compact, in-line control module with backlit, touch key user interface controls On/Off, Bluetooth® wireless technology and volume control
• Control module powered by two (2) AA batteries for up to 50 hours of use
• Collapsible, folding design for compact storage in David Clark headset bag (included)
• Weight (without cord assembly) 7.5 oz.
• FAA TSO C139a Approved
• 5 year warranty

Specs:

• Ear coupling: On-the-ear
• Hardware: Lightweight Alloy
• Connector type: Standard dual plugs
• Connection cable: 0.155” (4-mm) OD shielded cable, length approx. 6.9 ft. (2.1m)
• Weight w/o cable: approx. 7.5 oz. (215 g)
• Battery life: Up to 50 hours (2AA batteries)
• Operating temperature: -20°C to +55°C
• Operating voltage: 3VDC (2x AA)
• Dome type: ABS
• Characteristic SPL: approx. 91 dB SPL (1 kHz, 1 mW) at maximum volume nominal
• Contact pressure: approx. 0.6 lb. (2.7 N)
• ENC peak attenuation: 30dB at 150Hz
• ENC attenuation range: 20Hz-1KHz
• Total harmonic distortion (THD): < 1% - 110 dB SPL (300 - 3,000 Hz)
• Transducer principle: Dynamic
• Ear Impedance: 600 ohm / 1200 ohm stereo (each ear)
• Ear Freq Response: 12 – 15,000 Hz
• Microphone principle: pre-polarized condenser microphone (electret), noice-cancelling
• Mic Impedance: 150 ohm nominal
• Mic Sensitivity: 400 mV +/- 6 dB into 150 ohm load at 1kHz for 114 dB SPL input
• Mic Frequency Response: 150-8,000Hz
• Mic DC Supply Voltage: 8-16 V, not polarity sensitive
• Source Resistance: 470 ohm