Beyerdynamic DT 770 PRO - Reference Headphones for Control and Monitoring Purpose Manual

DESIGN FEATURES

The DT 770 PRO is a closed dynamic headphone and was designed for critical music and sound monitoring in an open environment. It has a bass reflex system to give low-frequency response down to 5 Hz and is equalised to the diffuse sound field. The weight of the diaphragm and moving coil of this headphone is approx. 20% compared to other current models. As a result, the DT 770 PRO offers similar pulse characteristics as electrostatic headphones. The cushion systems and light weight allow the DT 770 PRO to be used in complete comfort for long periods.

APPLICATION

• The DT 770 PRO is ideal for control and monitoring purposes.
• Due to the movable yokes and the adjustable headband made of spring steel, it can be ideally adapted to any head size.
• The connecting cable is single-sided and fitted with a 3-pole gold-plated mini jack plug (3.5 mm) and screw-on gold-plated adapter for 1/4" jack sockets (6.35 mm).
• 
  Connect the jack connector of the headphone cable to a headphone socket only! If you connect the headphones to any other jack socket, the headphones could be damaged.

MAINTENANCE

• As with any equipment which will be used in close proximity to sensitive areas of the body, it is essential that the ear pads and headband are kept clean. Use a damp cloth for cleaning using warm water only taking care not to allow any water drops into the ear cups or transducers.
• If necessary, you can carefully remove the ear pads and headband pad and clean them with mild soapy water.
• 
  Never use any solvent cleaning agents! Furthermore, the pads must be completely dry before they are attached to the headphone again.
• 
  Never use a vacuum cleaner for cleaning the headphones, as this may cause irreparable damage.
• Should it become necessary to replace the ear pads or the headband pad, refer to "Replacement parts and Accessories". You can easily do this yourself.
• If other components have to be replaced, please contact your local beyerdynamic representative.

HOW TO CHANGE THE EAR PADS

• To remove the ear pads, carefully pull them away from the earphone shell using your fingertips.
  
• To attach the ear pad, insert the plastic lip of the ear pad into the groove of the headphone and turn the ear pad clockwise until the ear pad is fully installed.
  
• Turn the attached ear pad a few times, as indicated by the arrow.
  

HOW TO CHANGE THE HEADBAND PAD

• To remove the headband pad, carefully unbutton the headband pad.
  
• To attach the headband pad, place it around the headband and the connecting cable and fasten the buttons.
  

VERSIONS

• Available versions can be found at:
  www.beyerdynamic.com

SUPPLIED ACCESSORIES

• 1 x 1/4" (6.35 mm) jack adapter
• 1 x Drawstring bag

ACCESSORIES AND REPLACEMENT PARTS

• Accessories and replacement equipment can be found at: www.beyerdynamic.com
• If you have technical problems while using the headphones or need further guidance, please visit our FAQ website at: support.beyerdynamic.com

SERVICE

• If you require service, please contact qualified service personnel or directly:
  beyerdynamic Service- und Logistik Center
  E-mail: service@beyerdynamic.de
• Dismantling the headphone yourself will invalidate the guarantee.

TECHNICAL SPECIFICATIONS

(all specifications acc. to EN 60 268-7)

SAFETY INSTRUCTIONS

Risk of injury

• We would like to point out that excessively high volumes and long listening times may cause hearing damage. Hearing defects always constitute an irreversible impairment of hearing ability. If you suffer from tinnitus, do not use headphones or reduce the volume.
• According to regulations to protect employees against damages caused by noise and vibrations, please follow these instructions:
  85 dB SPL for max. 8 hours
  88 dB SPL for max. 4 hours
  91 dB SPL for max. 2 hours
  94 dB SPL for max. 1 hour
  97 dB SPL for max. 30 minutes
  100 dB SPL for max. 15 minutes
• When connecting the headphones, please ensure that the volume is turned down to minimum. Adjust the volume after putting on the headphones.

Danger to life

• Headphones drastically reduce perception of external sounds. Using headphones in road traffic can be potentially dangerous. The user's hearing must not be impaired to the extent that it causes road safety risks. Please also make sure that you do not use the headphones in traffic, especially within an area of potentially dangerous machines and tools.
• Furthermore, avoid using headphones in situations where hearing must not be affected, especially when crossing a railway crossing or at a construction site.

Liability / intended use

• Do not use the product for any application which is not described in this product information.
• beyerdynamic is not liable for improper use of the product and its accessories.