DT 797 250 Ohm Professional Headset

The DT 797 is a perfect combination of the closed DT 770 PRO headphone, the high-quality condenser microphone of the DT 297 headset and a new, pivoting gooseneck microphone boom. This headset has been developed especially for live performances in very loud surroundings such as sporting events etc., where ambient noise attenuation, durability and comfort are of utmost importance.

The powerful headphone systems with a frequency response of 5 - 30,000 Hz provide a perfect reproduction and a balanced sound characteristic. The noise attenuating housing and the soft, circumaural leatherette ear pads provide an excellent isolation from ambient noise. The new, pivoting gooseneck microphone boom can be set into any required position so that the microphone can be used from the right or left hand side. When not in use, the microphone can be turned to the upper position. The condenser microphone is provided with a larger capsule with improved bass response. The cardioid polar pattern ensures a high gain-before- feedback and noise cancellation. In order to avoid damages, the cables in the headband and gooseneck boom are covered. The single-sided cable provides a 6.35 mm stereo jack plug (1/4") and a 3-pin male XLR connector.

Features:

Excellent ambient noise attenuation
High-quality cardioid condenser microphone for improved bass response and with high gain-before-feedback
Very high speech reproduction quality and excellent intelligibility
Pivotable, flexible gooseneck for optimal positioning with shock-mounted microphone
Robust, serviceable design as all part are replaceable
Single-sided connecting cable
Closed headphone
Rugged headband construction
Adjustable, soft padded headband
Circumaural soft ear pads

Specifications:

Headphone
Transducer type: . . . . . . . . . . .Dynamic
Operating principle: . . . . . . . . . . .Closed
Nominal frequency response: . . . . . . . . . . .5 - 35,000 Hz
Nominal impedance: . . . . . . . . . . . .250 ohm / system
Nominal input voltage: . . . . . . . . . . .2.8V (= 100mW at 250 ohm) = 120dB SPL
Nominal sound pressure level at 1 kHz: . . . . . . . . . .100 dB
T.H.D.: . . . . . . . . . . .<0.2%
Ambient noise attenuation: . . . . . . . . . . .approx. 20 dBA
Average pressure on ears: . . . . . . . . . . .approx. 4.5 N
Connector: . . . . . . . . . . .6.35mm stereo jack (1/4‚)
Weight (without cable): . . . . . . . . . . .395 g (0.87 lb)

Microphone
Transducer type . . . . . . . . . . . .Condenser (back electret)
Frequency response: . . . . . . . . . . .40 - 20,000Hz
Polar pattern: . . . . . . . . . . .Cardioid
Output voltage at a distance of 5 cm: . . . . . . . . . . .5.5 mV/Pa
Nominal impedance: . . . . . . . . . . .300 ohm
Nominal output impedance: . . . . . . . . . . .1000 ohm
Open circuit voltage: . . . . . . . . . . . .5 mV/Pa at f = 1 kHz
Max. SPL: . . . . . . . . . . .136 dB
S/N ratio: . . . . . . . . . . .64 dB
Current consumption: . . . . . . . . . . < 6 mA
Phantom supply: . . . . . . . . . . .12 - 48V
Connector:  . . . . . . . . . .3-pin XL R male
Gooseneck length: . . . . . . . . . . 120 mm (4.72")
Capsule diameter: . . . . . . . . . . 19 mm (0.75")
Weight: . . . . . . . . . . 30 g (0.07 lb)