1. Introduktion
Thank you for choosing the beyerdynamic DT 990 Pro X Over-Ear Studio Headphones. These headphones are designed for professional audio applications, including mixing, mastering, and editing. They feature an open-back design, a dynamic STELLAR.45 driver system, and a detachable cable for enhanced versatility and durability. This manual provides essential information for the proper setup, operation, and maintenance of your headphones.

Image 1.1: The beyerdynamic DT 990 Pro X headphones, showcasing their over-ear, open-back design.
2. Pakkens indhold
Kontroller venligst, at alle nedenstående varer er inkluderet i din pakke:
- beyerdynamic DT 990 Pro X Studio Headphones
- 3.0 m Mini-XLR Cable (3.5 mm Jack Plug)
- 6.35 mm Jack Adapter
- Snørepose

Image 2.1: All components included in the beyerdynamic DT 990 Pro X package: headphones, detachable cable, adapter, and carrying bag.
3. Opsætning
3.1 Tilslutning af kablet
- Locate the Mini-XLR input port on the left earcup of the DT 990 Pro X headphones.
- Align the Mini-XLR connector of the provided cable with the port and push firmly until it clicks into place.
- Connect the 3.5 mm jack plug of the cable to your audio source (e.g., audio interface, amplifier, computer).
- If your audio source requires a 6.35 mm connection, attach the included 6.35 mm jack adapter to the 3.5 mm jack plug.

Image 3.1: A hand connecting the detachable Mini-XLR cable to the earcup of the DT 990 Pro X headphones.
3.2 Førstegangsbrug
Ensure your audio source's volume is set to a low level before placing the headphones on your head. Gradually increase the volume to a comfortable listening level. The DT 990 Pro X headphones have an impedance of 48 Ohms, making them suitable for a wide range of devices without requiring a dedicated headphone amplifier, though a high-quality amplifier can further enhance performance.
4. Betjeningsvejledning
4.1 Sådan tager du hovedtelefonerne på
Adjust the headband so that the earcups sit comfortably over your ears, fully enclosing them. The velour ear pads are designed for extended wear. The open-back design allows for a wide soundstage and natural sound reproduction, which is beneficial for critical listening tasks.

Image 4.1: A user wearing the DT 990 Pro X headphones during an audio production session, demonstrating proper fit.
4.2 kompatible enheder
The DT 990 Pro X headphones are compatible with a variety of audio devices, including:
- Laptops and Desktops
- Audio Interfaces and Mixers
- Smartphones and Tablets (with appropriate adapters if needed)
- Spillekonsoller
- Smart Speakers and Televisions
5. Komfort og pasform
The DT 990 Pro X headphones are engineered for high comfort during long listening or working sessions. Key comfort features include:
- Ergonomically Designed Headband: Distributes pressure evenly across the head.
- Flexible Headband Construction: Ensures a secure yet comfortable fit for various head sizes.
- Soft Velour Ear Pads: Provide a gentle feel against the skin and contribute to breathability.

Billede 5.1: Detaljeret view of the ergonomically designed headband and soft velour ear pads, highlighting comfort features.
6. Vedligeholdelse
6.1 Rengøring
For at bevare dine hovedtelefoners levetid og hygiejne:
- Tør de udvendige overflader af med en blød, tør klud.
- The velour ear pads can be carefully removed and hand-washed with mild soap and water, then air-dried completely before reattaching.
- Undgå at bruge skrappe kemikalier eller slibende rengøringsmidler.
6.2 Opbevaring
When not in use, store the headphones in the provided drawstring bag to protect them from dust and scratches. Avoid exposing them to extreme temperatures or humidity.
6.3 Udskiftelige komponenter
The DT 990 Pro X is designed with replaceable components, including the ear pads and headband padding, ensuring long-term usability. Contact beyerdynamic support for replacement parts.

Billede 6.1: En intern view of the earcup, illustrating the design for replaceable components, emphasizing the product's repairability.
7. Fejlfinding
If you encounter issues with your DT 990 Pro X headphones, please refer to the following common solutions:
- Ingen lyd:
- Sørg for, at kablet er korrekt tilsluttet til både hovedtelefonerne og lydkilden.
- Check the volume level on your audio source and ensure it is not muted.
- Test the headphones with a different audio source or device to rule out source issues.
- Forvrænget lyd:
- Skru ned for lydstyrken på din lydkilde.
- Sørg for lyden file or stream is of good quality.
- Check for any loose connections in the cable.
- Ubehagelig pasform:
- Adjust the headband to find the optimal position on your head.
- Ensure the ear pads are correctly seated around your ears.
If these steps do not resolve the issue, please contact beyerdynamic customer support for further assistance.
8. Specifikationer
| Modelnavn | DT 990 Pro X |
| Varemodelnummer | BD1001629 |
| Øreplacering | Over Ear |
| Formfaktor | Over Ear |
| Forbindelsesteknologi | Kablet |
| Impedans | 48 Ohm |
| Frekvensområde | 5 - 40,000 Hz |
| Audio driver type | Dynamisk driver (STELAR.45) |
| Støjkontrol | Sound Isolation (Open-back design) |
| Hovedtelefonstik | 4-pin XLR (detachable cable) |
| Materiale | Fabric (ear pads) |
| Varens vægt | 292 gram (10.3 ounce) |
| Produktdimensioner | 7.87 x 7.87 x 7.87 tommer |
| Fabrikant | Beyerdynamisk |
| Oprindelsesland | Tyskland |
9. Garanti og support
beyerdynamic products are manufactured to high-quality standards. For information regarding warranty coverage, please refer to the warranty card included with your product or visit the official beyerdynamic website. For technical support, replacement parts, or service inquiries, please contact beyerdynamic customer support directly.
beyerdynamic USA
For support in the United States, please visit the beyerdynamic USA webwebsted eller kontakt deres kundeserviceafdeling.





