1. Introduction
The Linsoul TANGZU x HBB Wu Heyday In-Ear Monitors (IEMs) are a collaborative project designed to deliver a high-fidelity audio experience. Featuring an upgraded 14.5mm planar driver and a durable 5-axis CNC aluminum shell, these IEMs are engineered for balanced and neutral sound reproduction. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your Wu Heyday IEMs to ensure optimal performance and longevity.
2. Product Overview
2.1 Key Features
- Upgraded 14.5mm Planar Driver: Features OCC joint wire for enhanced audio performance with optimized bass and high frequency response.
- Balanced and Neutral Sound Signature: Tuned for an overall musical yet neutral and balanced sound with thick and spacious characteristics.
- 5-Axis CNC Aluminum Shell: Precision-crafted full aluminum case ensures durability and a premium feel.
- Detachable 3-in-1 Silver-Plated Cable: Includes 2.5mm, 3.5mm, and 4.4mm swappable jacks for wide device compatibility and balanced sound.
- Ergonomic and Comfortable Fit: Designed based on extensive human ear data for a secure and comfortable fit during long listening sessions.
- Impedance: 16 Ohm
- Frequency Range: 20 Hz - 20 kHz
2.2 Design Aesthetics
The Wu Heyday IEMs boast a sophisticated metal gray colorway, representing noble origins. The flat faceplate is elegantly engraved with a traditional Chinese auspicious cloud pattern, combining flashy aesthetics with classic appeal.

Figure 1: Front view of the Linsoul TANGZU x HBB Wu Heyday IEMs, showcasing the metal gray finish and engraved faceplate with the detachable blue braided cable.

Figure 2: Side view of the IEMs, highlighting the ergonomic shell design and the intricate cloud pattern.
3. Setup
- Choose Your Ear Tips: The Wu Heyday comes with various ear tips, including balanced, bass-enhanced, and foam options. Select the pair that provides the most comfortable and secure fit for your ears to ensure optimal sound isolation and audio quality.
- Connect the Cable:
- Identify the left (L) and right (R) IEM units and the corresponding connectors on the cable.
- Gently push the 2-pin 0.78mm connectors from the cable into the IEM units until they are securely seated. Ensure correct polarity.
- Select the Audio Jack: The detachable cable features swappable 2.5mm, 3.5mm, and 4.4mm jacks. Choose the appropriate jack for your audio source (e.g., 3.5mm for most smartphones/laptops, 2.5mm or 4.4mm for balanced audio players).
- Insert the IEMs: Carefully insert the IEMs into your ears, ensuring a snug fit. The ergonomic shape is designed to sit securely and comfortably.

Figure 3: The Wu Heyday IEMs with their included accessories, including different ear tips and the versatile detachable cable with swappable jacks.
4. Operating Instructions
Once set up, the Wu Heyday IEMs are ready for use with your preferred audio device. Connect the selected audio jack to your source and begin playback.
- Audio Playback: The IEMs are designed to deliver a balanced and neutral sound. Adjust the volume on your audio source to a comfortable listening level.
- Sound Characteristics: Expect clear and defined bass, natural mids, and extended treble without harshness. The planar driver ensures fast transient response, contributing to a clean and un-muddied sound across all frequencies.
- Gaming Performance: The Wu Heyday IEMs offer excellent performance for gaming due to their precise imaging and soundstage. You can accurately pinpoint the direction and distance of in-game sounds like footsteps and gunfire, providing a competitive advantage.
Video 1: Official product video showcasing the Linsoul TANGZU Wu Heyday HiFi Earphones in use.
5. Maintenance
- Cleaning: Regularly clean the ear tips and the IEM shells with a soft, dry cloth. For ear tips, you may use a slightly damp cloth and allow them to dry completely before reattaching. Avoid using harsh chemicals or abrasive materials.
- Storage: When not in use, store your Wu Heyday IEMs in the provided protective carrying case. This prevents dust accumulation, scratches, and tangling of the cable.
- Cable Care: Handle the detachable cable gently. Avoid sharp bends or excessive pulling. The modular design allows for easy replacement if needed.

Figure 4: The included carrying case and accessories, designed for safe storage and transport of your IEMs.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or intermittent sound from one or both IEMs. | Loose cable connection, incorrect jack, audio source issue. | Ensure 2-pin connectors are fully seated. Verify the audio jack is correctly inserted and compatible. Test with another audio source. |
| Poor sound quality (e.g., lack of bass, muffled sound). | Improper ear tip seal, incorrect ear tip size. | Experiment with different ear tip sizes and materials to achieve a proper seal. Ensure IEMs are inserted correctly. |
| Discomfort during prolonged use. | Incorrect ear tip size or insertion angle. | Try smaller or larger ear tips. Adjust the angle of insertion until comfortable. The ergonomic design is generally comfortable for most users. |
7. Specifications
| Feature | Specification |
|---|---|
| Driver Type | 14.5mm Planar Magnetic Driver |
| Impedance | 16 Ohm |
| Frequency Range | 20 Hz - 20 kHz |
| Sensitivity | 100 dB (1 kHz) |
| Distortion Rate | < 1% |
| Cable Type | 5N OFC 0.05 * 224 wire |
| Cable Length | 1.2 m + 5% |
| Interface | 2-PIN 0.78 |
| Shell Material | Aluminum |
| Headphones Jack | 2.5 mm Jack, 3.5 mm Jack, 4.4 mm Jack (via swappable connectors) |
8. Warranty and Support
Linsoul is committed to providing world-class customer service. Your TANGZU x HBB Wu Heyday IEMs come with a 1-Year Warranty for the main product and a 3-Month Warranty for accessories.
For any questions, support, or feedback regarding your product, please feel free to contact Linsoul customer support. Your support and feedback are valuable for future planning and development.
Visit the official Linsoul store for more information and support resources: Linsoul Official Store





