1. Introduction
Thank you for purchasing the STF Kube Fest 8-inch Wireless Speaker. This manual provides essential information for the safe and efficient operation of your device. Please read it thoroughly before use and retain it for future reference.
The STF Kube Fest speaker delivers powerful audio with 13,000 P.M.P.O. and features vibrant RGB LED lighting. It offers versatile connectivity options including Bluetooth, USB, 3.5mm AUX, 6.3mm input, and microSD card playback. The built-in rechargeable battery provides up to 4 hours of playback, and the True Wireless Stereo (TWS) function allows for pairing two speakers for an enhanced stereo experience.
2. Safety Information
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not disassemble, repair, or modify the device yourself. Refer all servicing to qualified personnel.
- Keep the speaker away from water or other liquids to prevent electric shock or damage.
- Use only the provided charging cable or a certified equivalent.
- Do not operate the speaker at excessively high volumes for prolonged periods to prevent hearing damage.
- Ensure proper ventilation when operating the speaker.
3. Package Contents
Please check that all items are present in your package:
- STF Kube Fest 8-inch Wireless Speaker
- Power Cable
- User Manual (this document)
4. Product Overview
4.1 Speaker Components

Figure 4.1: Front view of the STF Kube Fest speaker, showcasing the main speaker grille and the illuminated RGB light ring around the speaker cone. The STF logo is visible in the center.

Figure 4.2: Rear and side view of the STF Kube Fest speaker. This image highlights the top-mounted control panel, the integrated carrying handle, and the various input ports located on the side panel, including USB, Micro SD, and AUX inputs.
4.2 Control Panel and Ports
The speaker features a control panel typically located on the top or rear, providing access to various functions. Specific button labels and port functions are detailed below.
- Power Button: Turns the speaker on/off.
- Mode Button: Switches between input modes (Bluetooth, USB, Micro SD, AUX).
- Play/Pause Button: Plays or pauses audio playback.
- Volume Control: Adjusts the speaker's output volume.
- Previous/Next Track Buttons: Skips to the previous or next track.
- RGB Light Button: Controls the RGB lighting effects.
- TWS Button: Initiates True Wireless Stereo pairing.
- USB Port: For USB drive playback.
- Micro SD Card Slot: For Micro SD card playback.
- AUX Input (3.5mm): For connecting external audio devices via a 3.5mm cable.
- Microphone Input (6.3mm): For connecting a wired microphone.
- Charging Port: For connecting the power cable to recharge the battery.
5. Setup
5.1 Initial Charging
- Before first use, fully charge the speaker.
- Connect the provided power cable to the speaker's charging port and then to a suitable power outlet.
- The charging indicator light will illuminate. It will turn off or change color once charging is complete.
- A full charge typically takes approximately 3-4 hours.
5.2 Powering On/Off
- To power on, press and hold the Power Button for a few seconds until the speaker activates.
- To power off, press and hold the Power Button again until the speaker shuts down.
6. Operating Instructions
6.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode. If not, press the Mode Button until you hear a Bluetooth pairing prompt.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "STF Kube Fest" from the list of devices.
- Once paired, the speaker will indicate a successful connection, and you can begin playing audio from your device.
6.2 USB/Micro SD Playback
- Insert a USB drive or Micro SD card (pre-loaded with audio files) into the respective port/slot on the speaker.
- The speaker should automatically switch to USB or Micro SD mode and begin playback. If not, press the Mode Button to select the correct input.
- Use the Play/Pause, Previous, and Next buttons to control playback.
6.3 AUX Input
- Connect one end of a 3.5mm audio cable (not included) to the AUX input port on the speaker.
- Connect the other end of the cable to the audio output jack of your external device (e.g., MP3 player, computer).
- Press the Mode Button to switch to AUX mode.
- Control playback and volume from your external device.
6.4 True Wireless Stereo (TWS) Pairing
The TWS function allows you to pair two STF Kube Fest speakers together for a stereo sound experience.
- Ensure both STF Kube Fest speakers are powered on and in Bluetooth pairing mode (not yet connected to any device).
- On one of the speakers (this will be the primary speaker), press the TWS Button. The speaker will emit a sound indicating it is searching for another TWS speaker.
- The two speakers will automatically connect to each other. A confirmation sound will indicate successful TWS pairing.
- Now, connect your mobile device to the primary speaker via Bluetooth as described in section 6.1. Both speakers will play audio in stereo.
6.5 RGB Lighting Control
Press the RGB Light Button to cycle through different lighting modes or to turn the lights off.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's exterior. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, store the speaker in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Recharge the speaker regularly, even if not in use.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Low battery. | Charge the speaker using the provided power cable. |
| No sound. | Volume too low; incorrect input mode; device not connected. | Increase volume on speaker and connected device. Press Mode Button to select correct input. Re-pair Bluetooth device. |
| Bluetooth pairing fails. | Speaker not in pairing mode; device too far; interference. | Ensure speaker is in Bluetooth pairing mode. Move device closer. Turn off other Bluetooth devices. |
| TWS pairing fails. | Speakers not in TWS pairing mode; too far apart. | Ensure both speakers are in TWS pairing mode and close to each other. |
| USB/Micro SD playback not working. | Incorrect file format; card/drive not inserted correctly; corrupted files. | Ensure audio files are in a compatible format (e.g., MP3). Reinsert the USB drive/Micro SD card. Try a different drive/card. |
9. Specifications
| Model Number | ST-S01683 |
| Brand | STF |
| Speaker Type | Atmospheric |
| Special Features | RGB light up, Wireless |
| Speaker Size | 8 Inches |
| Peak Power Output | 13,000 P.M.P.O. Watts |
| Connectivity Technology | Bluetooth, USB, Micro SD, 3.5mm AUX, 6.3mm Input |
| Wireless Communication | Bluetooth |
| Power Source | Battery (Rechargeable) |
| Average Battery Life | 4 Hours |
| Product Dimensions (D x W x H) | 40 cm x 29 cm x 30 cm |
| Included Components | Power Cable |

Figure 9.1: Product dimensions of the STF Kube Fest speaker.
10. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official STF website. Keep your proof of purchase for any warranty claims.
Manufacturer: Stuffactory
Brand Store: Visit STF Store on Amazon