1. Introdución
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. Contido do paquete
Verifique que todos os elementos que se indican a continuación estean incluídos no seu paquete:
- beyerdynamic DT 990 Pro X Studio Headphones
- 3.0 m Mini-XLR Cable (3.5 mm Jack Plug)
- 6.35 mm Jack Adapter
- Bolsa de cordón

Image 2.1: All components included in the beyerdynamic DT 990 Pro X package: headphones, detachable cable, adapter, and carrying bag.
3. Configuración
3.1 Conexión do cable
- 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 Uso inicial
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. Instrucións de funcionamento
4.1 Como usar os auriculares
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 Dispositivos compatibles
The DT 990 Pro X headphones are compatible with a variety of audio devices, including:
- Portátiles e ordenadores de sobremesa
- Audio Interfaces and Mixers
- Smartphones and Tablets (with appropriate adapters if needed)
- Consolas de xogos
- Smart Speakers and Televisions
5. Comodidade e axuste
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.

Imaxe 5.1: Detallada view of the ergonomically designed headband and soft velour ear pads, highlighting comfort features.
6. Mantemento
6.1 Limpeza
Para manter a lonxevidade e a hixiene dos seus auriculares:
- Limpar as superficies exteriores cun pano suave e seco.
- The velour ear pads can be carefully removed and hand-washed with mild soap and water, then air-dried completely before reattaching.
- Evite o uso de produtos químicos agresivos ou produtos de limpeza abrasivos.
6.2 Almacenamento
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 Compoñentes substituíbles
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.

Imaxe 6.1: Un interno view of the earcup, illustrating the design for replaceable components, emphasizing the product's repairability.
7 Solución de problemas
If you encounter issues with your DT 990 Pro X headphones, please refer to the following common solutions:
- Sen son:
- Ensure the cable is securely connected to both the headphones and the audio source.
- Comprobe o nivel de volume da súa fonte de son e asegúrese de que non estea silenciado.
- Test the headphones with a different audio source or device to rule out source issues.
- Son distorsionado:
- Reduce the volume level on your audio source.
- Asegura o audio file or stream is of good quality.
- Check for any loose connections in the cable.
- Ajuste incómodo:
- 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. Especificacións
| Nome do modelo | DT 990 Pro X |
| Número de modelo do artigo | BD1001629 |
| Colocación do oído | Sobre orella |
| Factor de forma | Sobre orella |
| Tecnoloxía de conectividade | Con cable |
| Impedancia | 48 ohmios |
| Rango de frecuencias | 5 - 40,000 Hz |
| Tipo de controlador de audio | Dynamic Driver (STELLAR.45) |
| Control de ruído | Sound Isolation (Open-back design) |
| Jack para auriculares | 4-pin XLR (detachable cable) |
| Material | Fabric (ear pads) |
| Peso do elemento | 292 gramos (10.3 onzas) |
| Dimensións do produto | 7.87 x 7.87 x 7.87 polgadas |
| Fabricante | Beyerdynamic |
| País de Orixe | Alemaña |
9. Garantía e soporte
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 websitio ou póñase en contacto co seu departamento de atención ao cliente.