1. Introduction
This manual provides detailed instructions for the proper use, setup, and maintenance of your FiiO FH1s Hybrid In-Ear Monitors (IEMs). Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
2. What's in the Box
Verify that all items are present in the package:
- FiiO FH1s In-Ear Monitors (Left and Right)
- 0.78 2-pin High Purity Monocrystalline Litz Cable (3.5mm terminated)
- Balanced Eartips (3 pairs)
- Bass Eartips (3 pairs)
- Foam Eartips (1 pair)
- FiiO HB1 Carrying Case (1 unit)

Image: The FiiO FH1s earphones, showing the two earpieces connected by the braided cable, along with various eartips and the carrying case.
3. Product Overview
The FiiO FH1s are hybrid in-ear monitors featuring a 1BA+1DD (one Balanced Armature + one Dynamic Driver) configuration designed for high-fidelity audio reproduction. They are equipped with a detachable 0.78 2-pin cable for enhanced durability and upgradeability.
Key Features:
- Hybrid Driver Design: Combines a specially-customized balanced armature driver (co-developed by FiiO and Knowles) with a large 13.6mm polymer diaphragm dynamic driver for a balanced sound profile with deep bass and clear mids/highs.
- Detachable 0.78 2-pin Cable: High purity monocrystalline Litz cable for improved audio transmission and reduced skin effect, leading to better bass, mids, and overall frequency coherence.
- Ergonomic Design: Designed for comfortable wear, with multiple eartip options to ensure a secure fit and optimal sound isolation.
- Stylish Celluloid Faceplates: Each unit features a unique pattern under the FiiO logo due to multiple layers of celluloid, providing a distinct aesthetic.

Image: A detailed view of one FiiO FH1s earbud, highlighting its transparent black shell, the FiiO branding, and the 2-pin connector for the detachable cable.
4. Setup
4.1 Attaching the Cable
- Identify the left (L) and right (R) earpieces and cable connectors. The cable connectors are usually marked with 'L' and 'R'.
- Align the 2-pin connector on the cable with the corresponding socket on the earpiece. Ensure the pins are correctly oriented.
- Gently push the connector straight into the socket until it is firmly seated. Do not force it, as this may damage the pins.
- Repeat for the other earpiece.
Note: The 2-pin connectors are designed for a secure fit. When detaching, pull straight out without twisting.
4.2 Selecting Eartips
Proper eartip selection is crucial for comfort, sound quality, and noise isolation. Experiment with the included eartips:
- Balanced Eartips: Provide a neutral sound signature.
- Bass Eartips: Enhance bass response.
- Foam Eartips: Offer superior noise isolation and a comfortable fit, often with a slightly warmer sound.
To change eartips, gently pull off the current tip and push the desired tip onto the nozzle until it is securely attached.
5. Operating Instructions
5.1 Wearing the Earphones
- Identify the left and right earpieces.
- Insert each earpiece into the corresponding ear canal. The cable is designed to loop over the top of your ear for a secure and comfortable fit.
- Adjust the earpieces and cable until they feel comfortable and provide a good seal in your ear canal. A proper seal is essential for optimal bass response and noise isolation.

Image: The FiiO FH1s earphones shown with the cable routed over the ear, demonstrating the intended wearing style for stability and comfort.
5.2 Connecting to an Audio Source
The FiiO FH1s uses a standard 3.5mm audio jack. Connect the 3.5mm plug of the earphone cable to the headphone output of your audio device (e.g., smartphone, digital audio player, laptop, tablet).
Caution: Start with a low volume level on your audio device and gradually increase it to a comfortable listening level to prevent hearing damage.
6. Maintenance
- Cleaning Earpieces: Regularly wipe the earpieces with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the drivers.
- Cleaning Eartips: Eartips can be removed and washed with mild soap and water. Ensure they are completely dry before reattaching.
- Cable Care: Avoid sharp bends or excessive pulling on the cable. Store the earphones in the provided HB1 carrying case when not in use to protect them from damage.
- Storage: Store the earphones in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume |
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| Poor sound quality (e.g., lack of bass, muffled sound) |
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| Sound only from one side |
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8. Specifications
| Model Name | FH1s |
| Driver Type | 1 Balanced Armature + 1 Dynamic Driver (Hybrid) |
| Dynamic Driver Size | 13.6 mm |
| Frequency Response | 20 Hz - 20,000 Hz |
| Impedance | 26 Ohm |
| Connectivity | Wired (3.5mm Jack) |
| Cable Type | Detachable 0.78 2-pin, High Purity Monocrystalline Litz Cable |
| Weight | 21 Grams (0.741 ounces) |
| Color | Black |
| Material | Plastic |
| Product Dimensions | 7.36 x 4.8 x 2.09 inches (packaging) |
9. Warranty and Support
FiiO products typically come with a limited warranty. Please refer to the warranty card included with your product or visit the official FiiO website for detailed warranty terms and conditions specific to your region.
For technical support, troubleshooting assistance, or warranty claims, please contact FiiO customer service through their official website or authorized distributors.
Official FiiO Website: www.fiio.com





