1. Pengenalan
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. Kandungan Pakej
Sila sahkan bahawa semua item yang disenaraikan di bawah disertakan dalam pakej anda:
- beyerdynamic DT 990 Pro X Studio Headphones
- 3.0 m Mini-XLR Cable (3.5 mm Jack Plug)
- 6.35 mm Jack Adapter
- Beg Serut

Image 2.1: All components included in the beyerdynamic DT 990 Pro X package: headphones, detachable cable, adapter, and carrying bag.
3. Persediaan
3.1 Menyambungkan Kabel
- 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 Penggunaan Awal
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. Arahan Operasi
4.1 Memakai Fon Kepala
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 Peranti Serasi
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)
- Konsol Permainan
- Smart Speakers and Televisions
5. Keselesaan dan Kecergasan
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.

Imej 5.1: Terperinci view of the ergonomically designed headband and soft velour ear pads, highlighting comfort features.
6. Penyelenggaraan
6.1 Pembersihan
Untuk mengekalkan ketahanan dan kebersihan fon kepala anda:
- Lap permukaan luar dengan kain lembut dan kering.
- The velour ear pads can be carefully removed and hand-washed with mild soap and water, then air-dried completely before reattaching.
- Elakkan menggunakan bahan kimia yang keras atau pembersih yang kasar.
6.2 Penyimpanan
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 Komponen Boleh Ganti
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.

Imej 6.1: Satu dalaman view of the earcup, illustrating the design for replaceable components, emphasizing the product's repairability.
7. Penyelesaian masalah
If you encounter issues with your DT 990 Pro X headphones, please refer to the following common solutions:
- Tiada Bunyi:
- Pastikan kabel disambungkan dengan selamat pada fon kepala dan sumber audio.
- Check the volume level on your audio source and ensure it is not muted.
- Uji fon kepala dengan sumber atau peranti audio yang berbeza untuk menolak isu sumber.
- Bunyi Herot:
- Kurangkan tahap kelantangan pada sumber audio anda.
- Pastikan audio file or stream is of good quality.
- Check for any loose connections in the cable.
- Kesesuaian Tidak Selesa:
- 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. Spesifikasi
| Nama Model | DT 990 Pro X |
| Nombor Model Item | BD1001629 |
| Penempatan Telinga | Atas Telinga |
| Faktor Bentuk | Atas Telinga |
| Teknologi Ketersambungan | berwayar |
| Impedans | 48 Ohm |
| Julat Kekerapan | 5 - 40,000 Hz |
| Jenis Pemacu Audio | Dynamic Driver (STELLAR.45) |
| Kawalan Bunyi | Sound Isolation (Open-back design) |
| Jack Fon Kepala | 4-pin XLR (detachable cable) |
| bahan | Fabric (ear pads) |
| Berat Barang | 292 Gram (10.3 auns) |
| Dimensi Produk | 7.87 x 7.87 x 7.87 inci |
| Pengeluar | Beyerdynamic |
| Negara Asal | Jerman |
9. Waranti dan Sokongan
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 webtapak atau hubungi bahagian perkhidmatan pelanggan mereka.





