Linsoul 7Hz x Crinacle Zero:2
Linsoul 7Hz x Crinacle Zero:2 In-Ear Monitor Instruction Manual
Model: 7Hz x Crinacle Zero:2
Welcome
Thank you for choosing the Linsoul 7Hz x Crinacle Zero:2 In-Ear Monitors. These high-performance wired earbuds are designed to deliver exceptional audio quality with an updated 10mm dynamic driver, offering a rich and engaging sound experience. This manual provides essential information for setup, operation, and maintenance to ensure optimal performance and longevity of your IEMs.
Key Features
- 7Hz x Crinacle Collaboration: The original Zero, which was made in collaboration between 7Hz and Crinacle, made history by being one of the best performing budget IEM’s in the market. Crinacle is a world renown reviewer, whose frequency graph database has changed the audio market forever. Using his prolific experience with IEM and headphone sound profiles, Crinacle has provided guidance in tuning the Zero once again to have the best tonal balance possible. The updated Zero:2 features Crinacle’s inputs in order to refine this tried-and-true model in order to take it to the next level.
- More Bass, Keeping Tonal Excellence: The original Zero had one of the best-in-class tonal balance for a budget single dynamic driver IEM. However, this tonal balance also meant taming the bass, which may have been lacking for audiences wanting a more exciting sound. The Zero:2 maintains the perfect sound signature whilst adding on 3dB more in the low frequencies, which provides an engaging and powerful bass presence to bring your music to life. Bass impact and extension are markedly improved, providing more texture and tactile hits to the lows. Additionally, the midrange has a slightly improved body and warmth compared to the original Zero.
- New 10mm Dynamic Driver: The improvements in the tonal characteristics of the Zero:2 were made possible thanks to a newly developed 10mm dual cavity dynamic driver. With an upgraded PU+Metal composite diaphragm, the driver is significantly more responsive, allowing faster diaphragm movement. This allows for harder hitting bass, while maintaining crispness and precision with each note. With a frequency range of 10Hz to 20kHz, the improvements in the new driver is immediately noticeable. The slight warmth in the low-mids provides a fuller sound to instrument and vocal fundamental frequencies, yet still keeping the melodies clean and free from bass bleed.
- The 7Hz Legacy: 7Hz made global waves with several of its most popular models. IEMs such as the Salnotes Zero, Dioko, and Timeless gathered massive popularity due to their amazing price-to-performance value. 7Hz has proven itself to the worldwide audience as a trusted manufacturer of high-performance IEMs, and will continue its legacy with better innovations and stronger community engagement.
- Improved Custom Cable: The Zero:2 has been upgraded with a new high-purity oxygen-free copper cable with silver plating. Arranged in a coaxial structure, each wire is woven with 140.06 and 250.06 winding to strengthen the cable, as well as bringing about better audio transmission. The cable is removable to customize your listening experience as well as enhance the longevity of your IEM.
Setup Guide
1. Unboxing and Contents

Your Linsoul 7Hz x Crinacle Zero:2 package includes the IEM units, a high-purity oxygen-free copper cable with silver plating, and various silicone ear tips for a customized fit. The image above shows the contents of the box.
Watch this official video from Linsoul Audio for a quick overview of the 7Hz x Crinacle Zero:2 In-Ear Monitor and its components.
2. Attaching the Cable

The Zero:2 features a detachable 2-pin cable. Carefully align the pins on the cable with the receptacles on each IEM unit. Gently push until the cable is securely connected. Ensure the correct orientation (left and right) for optimal sound staging.
3. Selecting and Installing Ear Tips

Choose the ear tips that provide the best seal and comfort for your ears. A proper seal is crucial for bass response and sound isolation. Gently push the selected ear tip onto the nozzle of the IEM until it is firmly seated. Different sizes and colors are provided to help you find the perfect fit.
4. Wearing the IEMs

Insert the IEMs into your ear canals. The cable is designed to loop over your ear for a secure and comfortable fit, reducing microphonics (cable noise). Adjust the cable over your ear until it feels stable and the IEMs are snug in your ears.
5. Connecting to Your Device

Connect the 3.5mm jack of the IEM cable to your audio source (smartphone, digital audio player, computer, etc.). Ensure the connection is secure. The IEMs are now ready for use.
Operating Your Linsoul 7Hz x Crinacle Zero:2 IEMs
Audio Playback

Once connected, begin playing audio from your device. Adjust the volume to a comfortable listening level. The 7Hz x Crinacle Zero:2 IEMs are known for their balanced sound signature with enhanced bass, clear mids, and detailed highs, providing an immersive listening experience across various music genres. For optimal sound, ensure your audio files are of high quality.
Compatibility
These IEMs are compatible with any device featuring a standard 3.5mm audio jack. They are suitable for music listening, gaming, and studio monitoring, offering versatile use across different platforms.
Maintenance and Care
- Cleaning the IEMs: Regularly wipe the IEM units and ear tips with a soft, dry, lint-free cloth. For ear tips, you can gently wash them with mild soap and water, ensuring they are completely dry before reattaching.
- Cleaning the Nozzles: Periodically check the earbud nozzles for earwax buildup. Use a small, soft brush or a cleaning tool (often included with audio products) to gently remove any debris. Avoid using sharp objects that could damage the driver mesh.
- Cable Care: The high-purity oxygen-free copper cable is durable but should be handled with care. Avoid sharp bends or excessive pulling. When storing, coil the cable loosely to prevent tangling and damage.
- Storage: Store your IEMs in a clean, dry place, preferably in a protective case, to prevent dust accumulation and physical damage.
- Avoid Extreme Conditions: Do not expose the IEMs to extreme temperatures, high humidity, or direct sunlight for prolonged periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Sound or Low Volume | Improper connection, incorrect volume settings, ear tip seal issue. | Ensure the 3.5mm jack is fully inserted. Check device volume and IEM cable connection. Adjust ear tips for a proper seal. |
| Distorted Sound | Damaged cable, dirty nozzle, incompatible audio source. | Inspect the cable for damage. Clean the earbud nozzles. Try with a different audio source to rule out device issues. |
| Poor Fit or Discomfort | Incorrect ear tip size, improper wearing technique. | Experiment with different ear tip sizes provided. Ensure the cable is looped over your ear correctly. |
| Cable Detaches Easily | Loose 2-pin connection. | Ensure the 2-pin connectors are fully inserted and aligned. If the issue persists, the cable or IEM connector might be worn. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | 7Hz x Crinacle Zero:2 |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 10 Millimeters |
| Frequency Range | 10-20000Hz |
| Impedance | 32 Ohm |
| Sensitivity | 108 dB |
| Connectivity Technology | Wired |
| Headphones Jack | 3.5 mm Jack |
| Cable Feature | Detachable |
| Noise Control | Sound Isolation |
| Material | Plastic |
| Product Dimensions | 3.94 x 3.15 x 0.79 inches |
| Item Weight | 2.46 ounces |
Warranty and Support
Warranty Information
Linsoul provides a 1-year warranty on the 7Hz x Crinacle Zero:2 In-Ear Monitors. For specific warranty terms and conditions, please refer to the official Linsoul website or contact their customer support.
Customer Support
For any technical assistance, troubleshooting, or warranty claims, please contact Linsoul Audio customer support. Visit the official Linsoul Store for more information: Linsoul Audio Store.
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