Product Overview
The Superlux HD668B is a high-quality semi-open dynamic headphone designed to meet the rigorous demands of professional recording studios. Its robust construction ensures long-lasting durability, while the lightweight design and optimized mechanical pressure of the headband provide exceptional comfort for extended listening sessions.
The HD668B comes with two detachable straight cables: a 1-meter cable for portable use with personal sound sources and a 3-meter cable for professional monitoring applications. Both cables can be connected together for increased reach if required.
Key Features
- Natural, spatial, and accurate sound reproduction.
- Clear and precise treble response.
- Unobtrusive and natural rendition of string and wind instruments.
- Suitable for all music genres.
- Balanced, contoured, and deep bass.
- Exceedingly authentic voice reproduction.
- Detachable cables for versatility and easy replacement.
Setup Guide
1. Unpacking and Inspection
Carefully remove the Superlux HD668B headphones and all accessories from the packaging. Inspect all components for any signs of damage. The package should include the HD668B headphones, one 1-meter detachable cable, one 3-meter detachable cable, and a 6.3mm (1/4-inch) stereo adapter.
2. Connecting the Audio Cable
The HD668B headphones feature a detachable cable design. Select the appropriate cable length for your intended use (1-meter for portable devices or 3-meter for studio/home use). Insert the smaller 3.5mm jack end of the chosen cable firmly into the audio input port located on the left earcup of the headphone. Ensure it clicks securely into place.
Connect the other end of the cable to the 3.5mm headphone jack of your audio source (e.g., smartphone, computer, audio interface). If your audio source requires a 6.3mm (1/4-inch) connection, attach the included 6.3mm stereo adapter to the 3.5mm end of the cable before connecting it to your device.
3. Adjusting for Comfort
The HD668B headphones feature self-adjusting headband pads designed for optimal comfort. Place the headphones over your ears, ensuring the earcups fully enclose your ears. The headband will automatically adjust to fit your head size. The earcups are marked with 'L' for left and 'R' for right to ensure correct orientation.
Operating Instructions
1. Audio Playback
Once connected to your audio source, begin playback of your desired audio content. Adjust the volume level directly on your audio source device. The HD668B headphones do not feature inline volume controls.
2. Compatible Devices
The Superlux HD668B headphones are compatible with a wide range of audio devices, including:
- Music Production Equipment
- Laptops and Desktops
- Gaming Consoles
- Tablets and Smartphones
- Smart Speakers
- Televisions
- Car Audio Systems
3. Optimal Listening Experience
For the best audio experience, ensure your audio files are of high quality. The semi-open design of the HD668B provides a natural soundstage, but also allows some ambient sound to be heard, which is typical for monitoring headphones. This design helps prevent listening fatigue during long sessions.
Care and Maintenance
1. Cleaning
To clean the headphones, gently wipe the earcups and headband with a soft, dry, lint-free cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the speaker grilles or cable connections. Do not use harsh chemicals, solvents, or abrasive cleaners, as these can damage the headphone's finish and components.
2. Storage
When not in use, store the headphones in a clean, dry place away from direct sunlight, extreme temperatures, and high humidity. Avoid placing heavy objects on top of the headphones. Detaching the cable before storage can help prevent tangles and prolong cable life.
3. Cable Care
The detachable cables are designed for durability, but proper handling will extend their lifespan. Avoid sharp bends, kinks, or excessive pulling on the cables. Always grasp the plug, not the cable, when connecting or disconnecting. The included cable clip can secure the detachable cable from pulling out by incident.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume | Cable not fully connected; Audio source volume too low; Incorrect audio output selected on device; Faulty cable or audio source. | Ensure the headphone cable is securely plugged into both the headphone and the audio source. Increase the volume on your audio source. Verify the correct audio output device is selected in your computer or device settings. Try a different audio source or cable to isolate the issue. |
| Distorted sound | Audio source volume too high (clipping); Poor audio file quality; Loose cable connection. | Reduce the volume on your audio source. Try playing a different audio file to check if the distortion persists. Re-seat the cable connections firmly. |
| Sound only from one earcup | Cable not fully inserted; Damaged cable; Audio balance settings on device. | Ensure the cable is fully inserted into both the headphone and the audio source. Check the audio balance settings on your device to ensure it's centered. Try a different cable. |
| Headphones are uncomfortable after extended use | Initial adjustment period; Individual fit preference. | Allow some time for the headband and earpads to conform to your head. While the HD668B is designed for comfort, individual comfort can vary. Consider taking short breaks during long listening sessions. |
Technical Specifications
| Model Name | HD668B |
| Connectivity Technology | Wired |
| Headphones Jack | 3.5 mm Jack |
| Ear Placement | Over Ear |
| Form Factor | Over Ear |
| Earpiece Shape | Around-ear |
| Impedance | 56 Ohm |
| Frequency Range | 10-30KHz |
| Audio Driver Type | Dynamic Driver |
| Cable Feature | Detachable |
| Cable Length | 3 Meters (main cable) |
| Item Weight | 7.8 Ounces (approx. 221 grams) |
| Water Resistance Level | Not Water Resistant |
| Compatible Devices | Music Production Equipment, Laptops, Desktops, Gaming Consoles, Tablets, Telephones, Smart Speakers, Televisions, Car Audio Systems, Cellphones |
Warranty and Support
For warranty information, technical support, or service inquiries regarding your Superlux HD668B headphones, please refer to the official Superlux website or contact your local authorized dealer. Keep your proof of purchase for any warranty claims.
For general inquiries, you may visit the Superlux Official Website.
