NOTE: This professional headset is not supplied with a cable. The required cable for this headset to work correctly is dependent on its interfacing product specifications. 

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-serviceable construction. The headphone transducers feature extended frequency response. Adjustable, noise-cancelling microphone provides clear, audible speech transmission.

Features:

Highly sensitive headphone and microphone transducers
Excellent ambient noise attenuation
Capable of handling very high SPL
Rugged construction
Excellent comfort for long-term wearing
Modular construction for easy servicing

Specifications:

Headphone
Transducer type: . . . . . . . . . . . . . . .Dynamic
Operating principle: . . . . . . . . . . . . . Closed
Frequency response: . . . . . . . . . . . . 30 - 20,000 Hz
Nominal impedance. . . . . . . . . . . .50 ohm ±10%per cartridge*
Nominal SPL at 1kHz: . . . . . . . . . . . 94dB T.H.D < 1%
Power handling capacity: . . . . . . . .1000mW = ^ 124dB
Ambient noise attenuation: . . . . . approx. 20dBA
Sound coupling to the ear: . . . .Circumaural
Headband pressure: . . . . . . approx. 4.5 N
Weight (without cable): . . . . . . .390g

Microphone

Transducer type: . . . . . . . . . . . . .Dynamic
Operating principle: . . . . . . . . . Pressure gradient
Frequency response: . . . . . . . . . .40 - 12,000 Hz
Polar pattern: . . . . . . . . . . .Hypercardioid
Output voltage: . . . . . . . . . . .approx. 2.5mV at a distance of 5 cm
Nominal impedance: .. . . . . . . 200 ohm
Load impedance: . . . . . . . . .1000 ohm