Features :- Double sided version, Highly sensitive headphone and microphone transducers Excellent ambient noise isolation Capable of handling very high SPL Rugged construction Excellent comfort for long-term wearing Modular construction for easy servicing

Applications :- For many years, the DT 109 has been the standard headphone/microphone combination for live, remote broadcasting, studio, film, TV and language laboratory application. Rugged, field-servicable construction. The headphone transducers feature extended frequency response. Adjustable, noise-cancelling microphone provides clear, audible speech transmission.

Technical Specifications :- Impedance - Mic 200 ohms, headphones 50 ohms. Transducer type - Dynamic, Operating principle - Closed, Frequency response 30 - 20,000 Hz, Nominal SPL at 1 kHz 94 dB, T.H.D. < 1%, Power handling capacity 1000 mW, Ambient noise isolation 20 dB (A), Sound coupling to the ear Circumaural , Average pressure on ears 4.5 N, Weight without cable 390 g

Microphone Transducer type - Dynamic, Frequency response 40 - 12,000 Hz, Polar pattern Hypercardioid, Output voltage approx. 2.5 mV at a distance of 5 cm.