Introduction
The Austrian Audio Hi-X55 circumaural headphones are engineered for professional audio applications, offering exceptional sound quality, comfort, and durability. Featuring a unique foldable design and robust metal components, they are built to withstand the demands of both studio environments and on-the-go use. The innovative 44mm Hi-X (High Excursion) drivers provide optimized airflow and a powerful magnetic field, resulting in precise audio reproduction, especially for transients and deep bass frequencies. The double-walled earcups enhance ambient noise attenuation, while the redesigned slow-retention ear pads ensure extended comfort during long listening or recording sessions.
Key Features
- Professional Sound Quality: Impeccable audio suitable for daily use and professional recording studios.
- Advanced Driver Technology: Newly developed "High Excursion" technology ensures optimized airflow and the strongest magnetic field in its class for improved reproduction, especially with digital mixing systems.
- Superior Comfort: Double-walled circumaural enclosure and slow-retention ear pads provide high wearing comfort and prevent signal bleed into recordings.
- Robust and Durable Construction: Hinges and headband are made of metal, ensuring exceptional durability for daily rigors.
- Foldable Design: Allows for easy transport and storage.
- Detachable Cable: Includes a 3m removable 3.5mm jack cable with a 6.3mm adapter for versatile connectivity.
Package Contents
- Austrian Audio Hi-X55 Over-Ear Headphones
- Detachable 3.5mm Jack Cable (3 meters)
- 6.3mm (1/4") Adapter
- Storage Pouch (if included, common for headphones)
Setup
Connecting Your Headphones
The Hi-X55 headphones come with a detachable 3.5mm jack cable. To connect, simply insert the smaller end of the cable into the port on the left earcup until it clicks securely. Connect the other end of the 3.5mm jack cable to your audio source (e.g., audio interface, mixer, computer, smartphone).
For devices requiring a 6.3mm (1/4") connection, attach the included 6.3mm adapter to the 3.5mm jack before plugging it into your audio source.
Adjusting for Comfort
Adjust the headband by sliding the earcups up or down until they comfortably fit over your ears. The slow-retention ear pads are designed to conform to your head shape for extended comfort. Ensure a snug fit to maximize sound isolation and bass response.

Image: The Austrian Audio Hi-X55 headphones, showcasing their over-ear design and comfortable earcups.
Operating Instructions
Audio Playback
Once connected to your audio source, ensure the volume on your device is set to a low level before putting on the headphones. Gradually increase the volume to a comfortable listening level. The Hi-X55 headphones are designed for accurate and detailed sound reproduction, making them ideal for critical listening, mixing, and mastering.
Storage and Portability
The Hi-X55 headphones feature a foldable design for easy storage and transport. Gently fold the earcups inwards towards the headband. This compact form factor helps protect the headphones when not in use or when traveling.

Image: The Austrian Audio Hi-X55 headphones in their folded position, demonstrating their portability.

Image: A person wearing the Austrian Audio Hi-X55 headphones while working in a professional studio environment.
Maintenance
- Cleaning Ear Pads: Gently wipe the ear pads with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials.
- Cable Care: Always grasp the plug, not the cable, when disconnecting. Avoid sharp bends or kinks in the cable to prevent damage. The detachable cable can be replaced if necessary.
- Storage: When not in use, store the headphones in their protective pouch or a clean, dry place away from extreme temperatures and direct sunlight.
- General Cleaning: Use a soft, dry cloth to wipe down the headphone body. Do not immerse the headphones in water.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound | Cable not fully connected; Volume too low; Incorrect audio output selected on device. | Ensure cable is securely plugged into both headphones and audio source. Increase volume. Check audio output settings on your device. |
| Distorted or poor sound quality | Cable damage; Audio source issue; High volume causing clipping. | Inspect cable for damage; Test with a different audio source or cable. Reduce volume to prevent clipping. |
| Headphones feel uncomfortable after extended use | Improper fit; Need for adjustment. | Adjust the headband and earcups to find the most comfortable position. Take short breaks during long listening sessions. |
Technical Specifications
| Feature | Detail |
|---|---|
| Model Name | Austrian Audio Hi-X55 |
| Model Number | 65-90011 |
| Headphone Type | Circumaural (Over-Ear), Closed-back |
| Connectivity Technology | Wired |
| Frequency Range | 5 Hz - 28 kHz |
| Sensitivity | 118 dB SPL/V |
| Impedance | 25 Ohm |
| Total Harmonic Distortion (@ 1kHz) | <0.1% |
| Rated Power | 150 mW |
| Cable Length | 3 meters (detachable) |
| Connector Type | 3.5 mm Jack, with 6.3 mm (1/4") Adapter |
| Weight (without cable) | 305 g (approx. 0.67 lbs) |
| Product Dimensions | 27.94 x 30.48 x 10.16 cm (approx.) |
| Material | Metal (hinges, headband) |
Warranty and Support
Austrian Audio products are manufactured to high quality standards and come with a limited warranty. For detailed information regarding warranty coverage, terms, and conditions, please refer to the official Austrian Audio website or contact their customer support directly. Keep your proof of purchase for warranty claims.
For technical support, troubleshooting beyond this manual, or spare parts, please visit the Austrian Audio support page or contact their authorized service centers.
Note: Product specifications and appearance are subject to change without notice.





