FiiO FD11 High-Performance Dynamic Driver In-Ear Monitors User Manual

1. Product Overview

The FiiO FD11 are high-performance in-ear monitors designed for an immersive audio experience. They feature advanced acoustic technologies and durable construction to deliver clear, detailed sound.

Dynamic Driver: Equipped with 10mm carbon-based dynamic drivers, offering high hardness, light weight, and low distortion for superior sound reproduction.
Acoustic Design: Features "double acoustic back chambers" for enhanced control over mid and low frequencies, and an extended acoustic-damping-flute design for improved bass extension.
Sound Signature: Tuned for deep lows, smooth mids, and clear treble, providing a mild V-shaped sound profile with a noticeable bass boost, suitable for various music genres.
Magnetic System: Utilizes a "double-magnet" design (coil inner magnet + outer magnet) with stronger magnets to improve response speed and make the earphones easier to drive.
Construction: The housing is crafted from liquid metal die-cast material, which effectively inhibits resonance, contributing to a cleaner sound. It features a mirror-finished surface and tempered-glass faceplates.
Connectivity: Features 0.78mm 2-pin detachable connectors for the cable, allowing for easy replacement or upgrade.

FiiO FD11 Dynamic Driver Earphone with key features listed — Image 1.1: FiiO FD11 Dynamic Driver Earphone highlighting 10mm carbon-based diaphragm, deep lows, smooth mids and treble, and liquid metal die-cast housing.

2. Package Contents

Verify that all items are present in your FiiO FD11 package:

FiiO FD11 In-Ear Monitors (Left and Right)
Detachable 0.78mm 2-pin cable with 3.5mm audio plug
Eartips (various sizes)

FiiO FD11 In-Ear Monitors with detachable cable — Image 2.1: The FiiO FD11 In-Ear Monitors with their detachable cable.

3. Setup Instructions

3.1 Attaching the Cable

Identify the left (L) and right (R) earpieces and the corresponding connectors on the cable. The cable connectors are typically marked with 'L' and 'R', and often color-coded (e.g., blue for left, red for right).
Align the 0.78mm 2-pin connector on the cable with the receptacle on the earpiece. Ensure the pins are correctly oriented.
Gently push the connector straight into the earpiece until it is securely seated. Do not force the connection.
Repeat for the other earpiece.

3.2 Selecting Eartips

Proper eartip selection is crucial for sound quality and comfort. Experiment with the included eartips to find the best fit for your ears.

A good seal ensures optimal bass response and passive noise isolation.
If the sound lacks bass or sounds thin, try a larger eartip size.
If the fit is uncomfortable or causes pressure, try a smaller eartip size.

3.3 Wearing the Earphones

The FD11 earphones are designed to be worn with the cable routed over the ear.

Insert the earpiece into your ear canal.
Gently loop the cable over the top of your ear, allowing it to rest comfortably.
Adjust the earpiece until it feels secure and forms a good seal.

4. Operating Instructions

4.1 Connecting to an Audio Source

Plug the 3.5mm audio jack of the cable into the headphone output of your audio device (e.g., smartphone, digital audio player, computer).

4.2 Volume Control

Adjust the volume directly on your connected audio source. Start with a low volume and gradually increase it to a comfortable listening level.

Avoid listening at excessively high volumes for prolonged periods to prevent hearing damage.

5. Maintenance

5.1 Cleaning the Earphones and Eartips

Regularly clean the earpieces and eartips to maintain hygiene and sound quality.
Remove the eartips from the earphones.
Wipe the earpieces with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
Clean the eartips with mild soap and water, rinse thoroughly, and allow them to air dry completely before reattaching.
Ensure no moisture enters the driver units.

5.2 Cable Care

Avoid sharp bends or excessive pulling on the cable.
When disconnecting, always grasp the plug, not the cable itself.
Store the cable neatly to prevent tangling.

5.3 Storage

When not in use, store the FD11 earphones in a clean, dry place, preferably in a protective case, to prevent damage from dust, moisture, and physical impact.

6. Troubleshooting

Problem	Possible Cause	Solution
No sound or low volume	Cable not fully connected. Incorrect earpiece orientation (L/R). Audio source volume too low or muted. Faulty audio source or cable.	Ensure cable connectors are fully inserted into earpieces and audio source. Verify correct L/R placement. Increase volume on audio source and check for mute settings. Test with another audio source or cable if available.
Poor sound quality (e.g., lack of bass, tinny sound)	Poor eartip seal. Incorrect eartip size. Earphone nozzle blocked.	Adjust earpiece position to achieve a secure seal. Try different eartip sizes. Gently clean the earphone nozzle with a soft brush.
Discomfort or pain	Incorrect eartip size. Improper wearing technique.	Try smaller eartip sizes. Adjust the earpiece position for a more comfortable fit.

7. Specifications

Feature	Specification
Model Name	FD11
Ear Placement	In Ear
Audio Driver Type	Dynamic Driver (10mm carbon-based diaphragm)
Connectivity Technology	Wired
Headphones Jack	3.5 mm Jack
Cable Feature	Detachable (0.78mm 2-pin)
Impedance	24 Ohm
Frequency Range	20Hz-20kHz
Material	Liquid Metal Die-cast Housing
Item Weight	0.11 Kilograms (approx. 3.7 ounces)
Water Resistance Level	Not Water Resistant
Color	Silver

Frequency response graph for FiiO FD11 earphones — Image 7.1: Fine-tuned frequency response curve for the FiiO FD11, optimized for vocal-heavy, folk, and ACG music.

Diagram of a 10mm carbon-based diaphragm driver — Image 7.2: Illustration of the 10mm carbon-based diaphragm driver, designed for higher-end sound.

Diagram of a dual cavity dynamic drive for quick bass — Image 7.3: Cross-section diagram of the dual cavity dynamic drive, engineered for quick bass response.

FiiO FD11 earphones with liquid die-cast zinc alloy construction — Image 7.4: The FiiO FD11 earphones showcasing their liquid die-cast zinc alloy construction, which enhances clean sound.

Diagram of a C-shaped acoustic flute in the FiiO FD11 earphone — Image 7.5: Diagram illustrating the C-shaped acoustic flute design, which reduces resonances and provides more detailed airiness.

8. Warranty and Support

FiiO products are covered by a limited warranty. The specific terms and duration of the warranty may vary by region and purchase date. Please refer to the official FiiO website or your local distributor for detailed warranty information.

8.1 Customer Support

For technical assistance, warranty claims, or product inquiries, please contact FiiO customer support through their official website or the authorized dealer from whom you purchased the product.

FiiO Official Website: www.fiio.com

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