- Operating Instructions DT 250 DT 252 Professional Headphone DT 280 DT 290 DT 290 V.11 DT 291 PV DT 294 PV DT 294 V.11 Headset

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Technical Specifications
DT 250 / DT 252 / DT 280 / DT 290 / DT 290 V.11
/ DT 291 PV / DT 294 PV / DT 294 V. 11
Headphone
Frequency response . . . . . 10 - 30,000 Hz
(for headsets optimised for highest
intelligibility of speech)
Nominal impedance. . . . . 80 Ω / 250 Ω
Nominal sound pressure
level at1 kHz . . . . . . . . . . 100 dB SPL at 1 mW 0.28 V at
80 Ω
100 dB SPL at 1 mW 0.5 V at
250 Ω
Input power rating . . . . . 100 mW 120 dB 2.8 V at 80 Ω
100 mW 120 dB 5 V at 250 Ω
Ambient noise
attenuation . . . . . . . . . . . approx. 16 dBA
Headband pressure . . . . . 4.5 N
Weight (without cable)
DT 250 / DT 290 / DT 294 . 240 g
DT 252 / DT 280 . . . . . . . . 170 g
Wiring Diagram DT 250
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