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Hybrid Electronic Noise Cancellation (ENC/ANR) with advanced feed-forward and feed-back technology — best-in-class active noise reduction for its class (peak 30 dB @ 150 Hz; effective 20 Hz–1 kHz).
Bluetooth wireless for pairing with phones, tablets, music players, and other devices.
Dual voice coil earphone drivers for fail-safe operation (full communications continue if batteries die or ANR fails).
Digital Signal Processing (DSP) for high-fidelity audio.
Audio mute function and stereo/mono selection (compatible with all aircraft audio panels).
M-55 electret noise-cancelling microphone with full-flex boom.
Lightweight magnesium alloy headband and suspension with adjustable fit and swivel-hinge stirrups (low clamping pressure ~0.6 lb / 2.7 N).
On-the-ear (supra-aural / rest-on-ear) design with plush Dura-stitched leatherette ear seals and slow-recovery memory foam.
Outlast technology heat-absorbing head pad (reduces hot spots).
Compact in-line control module (powered by 2 AA batteries; up to 50 hours) with auto shutoff and volume controls.
Collapsible/folding design; includes David Clark soft-sided headset bag.
FAA TSO-C139 approved.
Made in USA; original 5-year warranty (transferability depends on original purchase/registration — confirm with David Clark if needed).

Specification	Details
Part Number	43100G-01
Ear Coupling	On-the-ear (supra-aural / rest-on-ear)
Hardware	Lightweight alloy (magnesium)
Connector Type	Standard dual GA plugs (PJ-055/PJ-068 style)
Cable	0.155" (4 mm) OD shielded, ~6 ft (1.8 m)
Weight (w/o cable)	~8.4 oz (238 g)
Battery Life	Up to 50 hours (2 AA batteries)
Operating Temperature	-20°C to +55°C
Operating Voltage	3 VDC (2× AA)
Dome Type	ABS
Characteristic SPL	~95 dB SPL (1 kHz, 1 mW) @ max volume
Contact Pressure	~0.6 lb (2.7 N)
ENC Peak Attenuation	30 dB @ 150 Hz
ENC Attenuation Range	20 Hz – 1 kHz
THD	<1% at 110 dB SPL (300–3,000 Hz)
Transducer	Dynamic
Ear Impedance	150 Ω mono / 300 Ω stereo (each ear)
Ear Frequency Response	12 – 15,000 Hz
Microphone	Pre-polarized condenser (electret), noise-cancelling (M-55)
Mic Impedance	150 Ω nominal
Mic Sensitivity	400 mV ±6 dB into 150 Ω load @ 1 kHz for 114 dB SPL input
Mic Frequency Response	150 – 8,000 Hz
Mic DC Supply	8–16 V, not polarity sensitive
Source Resistance	470 Ω

Genuine original David Clark DC PRO-X Hybrid ENC/ANR headset with standard dual GA plugs.
Ideal for general aviation, corporate, and commercial use where a lightweight rest-on-ear design is preferred.
Excellent passive + active noise reduction; clear communications and Bluetooth audio.
Works as a standard passive headset if batteries are depleted (thanks to dual voice coil drivers).
Collapsible for easy storage in the included bag.
Sold as-is for used units; buyer responsible for compatibility with their aircraft audio panel.