DT 252 - Headphones BEYERDYNAMIC - Free user manual and instructions

USER MANUAL DT 252 BEYERDYNAMIC

Operating Instructions

Professional Headphone

Casque de Studio

DT 280

DT 290

DT 291

DT 287

DT 297

Hör-Sprechgarnitur

Headset

Micro-casque

Design Features. Page 16

Connection. Page 16

Operation. Page 17

Maintenance. Page 18

Safety. Page 19

Models. Page 19

Spares. Page 20

Optional Accessories.. Page 20

Technical Specifications. Page 21

english

NOTICE D'UTILISATION SERIES DT 200

Description. Page 28

Branchements Page 28

Thank you for selecting one of the DT 200 series professional studio headphones or headsets. They have been made in Germany from high-grade materials and assembled under stringent quality and performance tests to provide you with a professional communications tool. Please take some time to read through this instruction booklet to give you an idea of the design criterion and some information on connection, use and maintenance.

Design Features

DT 250 / DT 252

The DT 250 / DT 252 is a closed dynamic headphone offering excellent ambient noise isolation making it suitable for all kinds of applications in broadcasting and recording studios. The headband and earphone cushioning systems have been carefully designed for maximum comfort and unobtrusive style. The powerful neodymium magnet system provides high-fidelity reproduction and a balanced sound. The standard impedance is 80 . Furthermore, versions with 250 systems are available. The connecting cables to the ear monitors run safely in the headband and the main connecting cable is terminated on one side with a multi-pin connector.

DT 280 / DT 290

Same as DT 250, but featuring the dynamic hypercardioid DM 290 microphone. The DT 280/DT 290 headset is used in intercom and talkback systems as well as other applications where a dynamic microphone is required. The DT 280/DT 290 V.11 has an integrated microphone preamp for AB-powering.

DT 291 / DT 297

Same as DT 250, but featuring an omnidirectional electret condenser microphone (DT 291) or a cardioid condenser microphone (DT 297). The DT 291 PV/DT 297 PV is equipped with an integrated preamp for phantom powering.

The DT 297 V.11 has an integrated microphone preamp for AB-powering.

Connection

The DT 250 / DT 252 headphones are supplied with an appropriate connecting cable. The the DT 280 / DT 290 / DT 291 / DT 287 / DT 297 headsets are supplied without connecting cable. For appropriate connecting cables, please refer to "Optional Accessories". Direct solder connections can be made to all cables with free ends (for cable connection refer to "Block Diagram").

Upon request the required plugs can be connected at the factory.

It is important that the external equipment the studio headphones or the headsets will be connected to are of good quality and of the correct impedance and power ratings to get the best performance from them. Please refer to the "Technical Specifications" for detailed information.

The microphone of the DT 280 / DT 290 headset is designed for balanced connection. But it can be also connected to unbalanced microphone inputs.

The DT 291 PV or DT 297 PV headsets are suitable for the connection to balanced microphone inputs with phantom power. At a distance of 5cm the microphone level is 13mV or 250mV .

Use the DT 280/DT 290 V.11 or DT 287/DT 297 V.11 headset with integrated preamp for connecting to TV cameras with a microphone input for AB-powering. At a distance of 5cm the microphone level can be adjusted between 52mV and 1.3V at normal speech volumes. The supply voltage for the pre-amplifier can vary between 6 - 27V . The power consumption is at:

		DT 290 V.11	DT 297 V.11
6 V	Rvor 330 Ω	8 mA	6 mA
12 V	Rvor 330 Ω	23 mA	20 mA
20 V	Rvor 330 Ω	43 mA	40 mA
27 V	Rvor 330 Ω	61 mA	57 mA

Operation

The headphones are fully adjustable and should be positioned for the best fit over the ears. This will give maximum long-term comfort and will minimise sound leakage or spill. Convention states that the boom microphone is placed over the left ear. The microphone can be used from the right ear, but if true L and R headphone status needs to be maintained, it will be necessary to make a custom lead with the headphone connections reversed (swap brown/orange on the left side and red/blue on the right side). For connections refer to "Block Diagram".

3. Turn the

microphone holder 90^

Tighten screws and put

cap on again.

V.11-Version of DT 287/297:

Adjustment of the built-in microphone pre-amplifier.

The microphone should be positioned to the side of the mouth, about 20 - 30mm forward. This will keep it within the direct sound path but out of breath stream, therefore minimising any 'pop' sounds.

Maintenance

As with any equipment which will be used in close proximity to sensitive parts of the body, it is essential that the ear pads, the headband and the microphone pop-shield are kept clean. Use a damp cloth for cleaning the ear-pads and headband using only gentle cleansing agents (such as washing-up liquid). Take care not to allow any water drops into the transducer elements and do not use any solvent cleaners. The microphone pop-shield of the headsets can be easily removed and washed in warm water. Please take care that the pop shield is completely dry when it is replaced. The ear-pads can wear out due to effects of skin moisture, cosmetics and mechanical strains while wearing the headphones. From time to time you will need to replace the ear-pads:

1. Remove the ear-pad from the housing part.
2. Put the new ear-pad on the housing so that the drop-in pins can lock in the corresponding holes.
3. Press the new ear-pad with the thumbs of both hands to the housing until you hear a clear "click" noise.

Safety

When plugging in any of the DT 200-series headsets to the drive amplifier, we recommend that this is done before it is fitted over the ears for use. This will give the technician the chance to check that the volume levels are not too high. Please remember that the user could well be a highly-paid presenter and the consequences of damaging his/her ears may well prove to be music to the ears of the lawyer! The very low levels of distortion can make listening levels higher than is perceived and we have to warn you that listening to programme or talkback at high levels for long periods can permanently damage your hearing.

Models

DT 250 Studio headphone, 80 Ω, black, with WK 250.07 coiled cable, plug-in type (stereo mini jack plug with 1/4" adapter) Order # 442.844
DT 250 Studio headphone, 250 Ω, black, with WK 250.07 coiled cable, plug-in type (stereo mini jack plug with 1/4" adapter) Order # 443.530
DT 252 Single-ear studio headphone, 80 Ω, black, with WK 250.07 coiled cable, plug-in type (stereo mini jack plug with 1/4" adapter) Order # 445.177
DT 280 Single-ear headset, 200/80 Ω.. Order # 441.309
DT 280 Single-ear headset, 200/250 Ω. Order # 447.269
DT 280 V.11 Headset, 200/80 Ω with integrated pre-amp.... Order # 442.860
DT 290 Headset, 200/80 Ω . . . Order # 441.317
DT 290 Headset, 200/250 Ω . . . Order # 447.277
DT 290 V.11 Headset, 200/80 Ω with integrated pre-amp . . . . Order # 441.384
DT 291 PV Headset, 80 Ω, condenser microphone (omnidirectional), with integrated preamp for phantom powering . . . . . . . . . . . . . Order # 447.129
DT 291 PV same as above, but 250 Ω .... Order # 447.137
DT 287 PV Single-ear headset, 80 Ω, condenser microphone (cardioid) Order # 479.349

DT 287 V.11 Single-ear headset, 80 Ω, condenser microphone (cardioid) Order # 479.357
DT 297 PV Headset, 80 Ω, condenser microphone (cardioid), for 12 - 48 V phantom power.. . Order # 479.365
DT 297 PV same as above, but 250 Ω .... Order # 479.454
DT 297 V.11 Headset, 80 Ω, with integrated microphone pre-amp.... Order # 479.462

Spares

BN 59-59/A Headband cushion. Order # 503.886
EDT 250 V Ear cushions pair (cloth), for DT 25^ / 28^ / 29^ . . . Order # 942.704
EDT 250 S Ear cushions pair (soft PVC), for DT 25^ / 28^ / 29^ . Order # 943.549
WS 97 AZ Wind screen, charcoal-grey. . . . Order # 465.313

Optional Accessories

WK 250.07 Coiled cable for DT 25 stereo mini jack plug with 1/4'' adapter . . . . . . Order # 442.070
K 190.00 Straight cable for DT 28^ / DT29^ 1.5m, free ends.. Order # 431.575
K 190.00 Straight cable for DT 28^ / DT29^ 3 m, free ends . Order # 441.937
K 190.28 Straight cable for DT 28^ / DT29^ 1.5 m, with 4-pin XLR socket .. Order # 445.304
K 190.39 Straight cable for V.11 version of the DT 29 series, with 5-pin XLR plug to connect to professional cameras (Sony, Philips, Ikegami), 1.5 m. Order # 475.181
K 190.40 Straight cable for DT 28/DT29, 1.5 m, with 3-pin XLR plug and 1/4" stereo jack plug.... Order # 445.894
K 190.40 Straight cable for DT 28/DT29, 3 m, with 3-pin XLR plug and 1/4" stereo jack plug.... Order # 446.750
K 190.41 Straight cable for DT 28^ / DT29^ 1.5 m, with 5-pin XLR plug.... Order # 445.312
K 190.48 Straight cable for DT 280/DT 290 with 2 × 3.5 mm stereo jack plugs to connect to PC sound cards (Warning: No phantom powering). Order # 479.470
WK 190.00 Coiled connecting cable for DT 28^ / DT29^ 3 m, free ends . Order # 448.176

Technical Specifications

DT 250 / DT 252 / DT 280 / DT 290 / DT 291 / DT 287 / DT 297

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 1mW= 0.28V at 80Ω 100 dB SPL at 1mW= 0.5V at 250Ω

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 /

DT 297 240 g

DT 252 / DT 280 / DT 287 . 170 g

Wiring Diagram DT 250

* Sonderausführung 250 Ohm System lieferbar
*Special model 250 ohm system available

DT 280 / DT 290

Microphone

Transducer type. dynamic

Frequency response 40 - 12,000 Hz

Polar pattern. hypercardioid

Interference discharging . . . 30 dB

Output voltage at a distance

of 5 cm approx. 3mV

Nominal impedance . approx. 200 Ω

Weight. approx. 45 g

Frequency Response Curve

Frequency response curve ± 2.5 dB 0dB = 3mV Output voltage at a distance of 5cm

Wiring Diagram

Polar Pattern

DT 290 V.11

Microphone

Transducer type.......dynamic

Frequency response 40 - 12,000 Hz

Polar pattern. hypercardioid

Output voltage at a distance

of 5cm Is = 16mA,

Us = 10 V, Rv = 330 Ω . . . approx. 1.5 V

Output voltage at a distance

of 5cm Is = 16mA,

Us = 10 V, Rv = 330 Ω,

R_LS = 200 approx. 750mV

Nominal impedance . approx. 200 Ω

Current consumption min. . . . 8 mA

Current consumption max. . . . 56 mA

Weight approx. 45 g

Frequency Response Curve

Wiring Diagram

Polar Pattern

DT 291 PV Microphone

Transducer type........ condenser (back electret)

Frequency response 20 - 18,000 Hz

Polar pattern. omnidirectional

Output voltage at a distance

of 5cm approx. 13 mV

Nominal impedance . . . approx. 200 Ω

Load impedance 1000

Max.SPL. 127 dB

Current consumption . approx. 3.5 mA

Phantom powering. 12-48 V

Weight. approx. 20 g

Frequency Response Curve

Wiring Diagram

Polar Pattern

DT 287 PV / DT 297 PV

Microphone

Transducer type........ condenser (back electret)

Frequency response 40 - 20,000 Hz

Polar pattern. cardioid

Output voltage at a distance

of 5cm 5.5 mV

Nominal impedance 300

Load impedance. ≥ 1000

Max.SPL. 132 dB

S/N ratio. 62 dB

Current consumption . . . approx. 3.5 mA

Phantom powering. 12-48 V

Weight. approx. 30 g

Frequency Response Curve

Wiring Diagram

Sonderausführung 250 Ohm System lieferbar
Special model 250 ohm system available

english

Polar Pattern

DT 287 V. 11 / DT 297 V.11

Microphone

Transducer type........ condenser (back electret)

Frequency response 20 - 20,000 Hz

Polar pattern. cardioid

Output voltage at a distance

of 5cm approx. 52mV - 1.3V adjustable

Nominal impedance 300Ω

Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Diagram

NOTICE D'UTILISATION

DT 250 / DT 252 / DT 280 / DT 290 / DT 291 / DT 287 / DT 297

Farmingdale, NY 11735

Tel. [phone]

Fax [phone]

[e-mail]

www.beyerdynamic.com