Sudio SD-1911
Sudio S2 Bluetooth Speaker User Manual
Model: SD-1911 | Brand: Sudio
1. Introduction and Overview
The Sudio S2 is a compact and portable Bluetooth speaker designed to deliver high-quality audio for various environments, from home use to outdoor adventures. Featuring robust sound, long battery life, and IPX5 water resistance, it is built for convenience and durability, allowing you to enjoy your music wherever you go.
2. Package Contents
Please check the box for the following items:
- Sudio S2 Bluetooth Speaker
- USB-C Charging Cable
- Quick Start Guide
3. Product Features
3.1 Great Sound Quality
With crystal highs, crisp mids, and rich bass, the S2 creates an immersive listening experience. State-of-the-art bass radiators and a dynamic driver deliver high-quality sound without distortion, even at maximum volume.

Image: The Sudio S2 speaker, demonstrating its ability to fill your space with stunning, powerful sound.
3.2 Pocket Size Design
Elevate your audio experience with our stylish portable mini speaker that is designed to be light and compact, enhancing your on-the-go lifestyle. Its compact size allows for easy storage in your pocket, purse, or gym bag, making it the perfect travel companion.

Image: The Sudio S2 speaker, showcasing its super slim and compact design that fits easily in your pocket.
3.3 Broadcast Function (TWS Pairing)
Play up to two speakers together for an enhanced stereo sound experience. The advanced internal antenna design with Bluetooth 5.3 provides fast connection and an incredible wireless Bluetooth range of up to over 30 unobstructed feet (10 meters) from your device. It connects easily with Android, iOS, and all other Bluetooth devices.

Image: Two Sudio S2 speakers, demonstrating the broadcast function that allows pairing for an amplified sound experience.
3.4 IPX5 Waterproof
This waterproof speaker is perfect for all sorts of fun, resistant to splashes of sweat, water, and rain. Ideal for pool parties, beach lounging, or shower singing.

Image: The Sudio S2 speaker, highlighting its IPX5 waterproof rating, resistant to splash of sweat, water, and rain.
3.5 Long Battery Time
Keep the music pumping all day long. The powerful battery guarantees up to 30 hours of continuous use, allowing you to enjoy your favorite songs whenever, wherever you please.

Image: The Sudio S2 speaker, illustrating its long battery life for immersive music all day long.
3.6 Stylish Colors
Make a fashion statement with our portable mini speakers, available in 4 colors: Beige, Black, Blue, and Grey.

Image: The Sudio S2 speaker, available in 4 stylish colors to match your preference.
4. Setup
4.1 Charging the Speaker
Before first use, fully charge the Sudio S2 speaker using the provided USB-C cable. Connect the USB-C end to the speaker's charging port and the other end to a compatible USB power adapter (not included). The charging indicator light will show the charging status and turn off when fully charged.
4.2 Power On/Off
To turn the speaker ON, press and hold the power button (located on the side, usually indicated by a power symbol) for approximately 2-3 seconds until you hear a power-on sound and the indicator light illuminates.
To turn the speaker OFF, press and hold the power button again for approximately 2-3 seconds until you hear a power-off sound and the indicator light turns off.
4.3 Bluetooth Pairing
- Ensure the Sudio S2 speaker is powered on. It will automatically enter pairing mode, indicated by a rapidly flashing blue LED light.
- On your device (smartphone, tablet, computer, etc.), enable Bluetooth and search for new devices.
- Select 'Sudio S2' from the list of available devices.
- Once connected, the LED light on the speaker will turn solid blue, and you will hear a confirmation sound.
5. Operating Instructions
5.1 Basic Audio Playback
Once successfully paired, play audio from your connected device. The sound will be streamed wirelessly to your Sudio S2 speaker.
5.2 Volume Control
- Press the '+' button on the speaker to increase volume.
- Press the '-' button on the speaker to decrease volume.
- You can also adjust the volume directly from your connected device.
5.3 Track Control
- Press the Play/Pause button once to play or pause the current track.
- Double-press the '+' button to skip to the next track.
- Double-press the '-' button to go back to the previous track.
5.4 Broadcast Function (TWS Pairing for Stereo Sound)
To connect two Sudio S2 speakers for a true wireless stereo experience:
- Ensure both Sudio S2 speakers are powered on and are NOT connected to any Bluetooth device.
- On one of the speakers (this will be your primary speaker), press and hold the Broadcast Function button (often indicated by a chain link or infinity symbol) for a few seconds until you hear a pairing prompt.
- The two speakers will automatically search for and connect to each other. You will hear a confirmation sound once they are successfully paired.
- Now, connect your device to the primary speaker (the one you initiated TWS pairing on) as described in the 'Bluetooth Pairing' section (4.3).
- Audio will now play in stereo, with one speaker handling the left channel and the other the right.
6. Maintenance
6.1 Cleaning
Wipe the speaker with a soft, slightly damp cloth. Do not use harsh chemicals, abrasive cleaners, or solvents, as these may damage the surface or internal components. Ensure the charging port is completely dry before charging.
6.2 Storage
When not in use for extended periods, store the Sudio S2 speaker in a cool, dry place away from direct sunlight, extreme temperatures, and excessive humidity.
6.3 Battery Care
To prolong the lifespan of the speaker's battery, avoid fully discharging it frequently. It is recommended to charge the speaker regularly, even if not in constant use, to maintain optimal battery health.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker won't turn on | Low battery | Charge the speaker fully. |
| No Bluetooth connection | Speaker not in pairing mode / Device Bluetooth off | Ensure speaker is in pairing mode (flashing blue LED). Turn on Bluetooth on your device. Forget 'Sudio S2' on your device and re-pair. |
| No sound from speaker | Volume too low / Device not playing audio / Incorrect audio output selected on device | Increase speaker and device volume. Check if audio is playing on your device. Ensure 'Sudio S2' is selected as the audio output. |
| Sound distortion | Volume too high / Weak Bluetooth signal | Reduce volume on speaker or device. Move your device closer to the speaker (within 30 feet/10 meters). |
| TWS pairing fails | Speakers already connected to a device / Speakers too far apart / Incorrect pairing procedure | Disconnect both speakers from any devices. Ensure speakers are within close proximity (e.g., 1-2 meters). Follow the TWS pairing steps precisely. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | Sudio S2 |
| Model Number | SD-1911 |
| Speaker Type | Portable |
| Connectivity | Bluetooth 5.3 |
| Waterproof Rating | IPX5 |
| Battery Life | Up to 30 hours |
| Dimensions (DxWxH) | 1.61" x 3.54" x 2.99" (4.1cm x 9cm x 7.6cm) |
| Weight | 210 Grams (7.4 ounces) |
| Control Method | Touch |
| Power Source | Battery Powered |
| Included Components | Speaker, Quick Start Guide |
| Maximum Bluetooth Range | 32.8 Feet (10 meters) |
| Audio Driver Type | Dynamic Driver |
| Speaker Maximum Output Power | 5 Watts |
| Frequency Response | 160.2 KHz |
9. Warranty and Support
The Sudio S2 Bluetooth Speaker comes with a Limited Warranty provided by Sudio. For detailed warranty terms, conditions, and to register your product, please visit the official Sudio website. For technical support, troubleshooting assistance, or any other inquiries, please contact Sudio customer service through their official channels.
You can find more information and support at the Sudio Brand Store on Amazon.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.





