1. Introduction
Thank you for purchasing the Sharp GX-BT390 Crystal Clear Series Bluetooth Speaker. This portable speaker is designed to deliver high-quality audio with enhanced bass, featuring IP67 waterproof and dustproof capabilities, LED light modes, and True Wireless Stereo (TWS) pairing. This manual provides essential information for setup, operation, and maintenance to ensure optimal performance and longevity of your device.
2. Package Contents
Please check that all items are present:
- Sharp GX-BT390 Bluetooth Speaker
- Charging Cable (USB-C)
- User Manual
3. Product Overview
Familiarize yourself with the various parts of your Sharp GX-BT390 speaker.
Figure 3.1: Front view of the Sharp GX-BT390 speaker, highlighting the control panel with volume buttons, play/pause, and power indicator.
Figure 3.2: Back view of the Sharp GX-BT390 speaker, illustrating the sealed charging port and attachment points for the carrying strap.
Figure 3.3: Side view of the Sharp GX-BT390 speaker, showing the textured surface and the adjustable carrying strap.
Figure 3.4: The Sharp GX-BT390 speaker with its end cap illuminated, displaying the Sharp logo and an active LED light mode.
Controls and Indicators:
- Power Button: Press and hold to turn on/off.
- Volume Up (+): Increase volume.
- Volume Down (-): Decrease volume.
- Play/Pause Button: Play or pause music, answer/end calls.
- Bluetooth Pairing Button: Initiate Bluetooth pairing mode.
- LED Indicator: Shows power status, charging status, and Bluetooth connection status.
- Light Mode Button: Cycle through LED light modes.
4. Setup
4.1 Charging the Speaker
- Open the protective cover on the back of the speaker to access the USB-C charging port.
- Connect the provided USB-C cable to the speaker's charging port.
- Connect the other end of the USB-C cable to a compatible USB power adapter (not included).
- The LED indicator will show charging status. A full charge typically takes approximately 3-4 hours.
- Once fully charged, disconnect the cable and securely close the protective cover to maintain IP67 water and dust resistance.
4.2 Powering On/Off
- To Power On: Press and hold the Power button for approximately 2 seconds until you hear an audible tone and the LED indicator illuminates.
- To Power Off: Press and hold the Power button for approximately 2 seconds until you hear an audible tone and the LED indicator turns off.
4.3 Bluetooth Pairing
- Ensure the speaker is powered on and within 1 meter of your Bluetooth device.
- The speaker will automatically enter Bluetooth pairing mode when first powered on, or if no device is connected. The LED indicator will flash rapidly.
- On your Bluetooth device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Sharp GX-BT390" from the list of devices.
- Once paired, you will hear a confirmation tone, and the LED indicator will glow solid blue.
- If pairing fails, turn off the speaker and your device, then repeat the steps.
5. Operating Instructions
5.1 Music Playback
- Play/Pause: Press the Play/Pause button once.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Next Track: Press and hold the '+' button.
- Previous Track: Press and hold the '-' button.
5.2 Hands-Free Calling
The Sharp GX-BT390 features a built-in microphone for hands-free calls when connected to your smartphone.
- Answer Call: Press the Play/Pause button once.
- End Call: Press the Play/Pause button once during a call.
- Reject Call: Press and hold the Play/Pause button for 2 seconds.
5.3 True Wireless Stereo (TWS) Pairing
You can pair two Sharp GX-BT390 speakers together for a stereo sound experience.
- Ensure both GX-BT390 speakers are powered on and not connected to any Bluetooth device.
- On one speaker (this will be the primary speaker), press and hold the Bluetooth pairing button for 3 seconds. You will hear a tone.
- The two speakers will automatically search for and connect to each other. Once connected, you will hear a confirmation tone.
- Now, connect your Bluetooth device to the primary speaker as described in section 4.3.
5.4 LED Light Modes
The speaker features two LED mood lighting effects that synchronize with the music.
- Press the Light Mode button to cycle through the available light modes.
- Press the Light Mode button again to select the next mode or turn off the lights.
Figure 5.1: Overview of key features including hands-free calling, LED light effects, IP67 rating, 10-hour playtime, 30W power output, and Bluetooth connectivity.
6. Maintenance
To ensure the longevity and performance of your Sharp GX-BT390 speaker, follow these maintenance guidelines:
- Cleaning: Wipe the speaker with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Water and Dust Resistance (IP67): The speaker is rated IP67, meaning it is protected from dust ingress and can withstand immersion in water up to 1 meter for 30 minutes. Ensure the charging port cover is securely closed to maintain this rating. Avoid prolonged exposure to water or extreme conditions.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery life, charge the speaker regularly, even if not in use for extended periods. Avoid fully discharging the battery frequently.
Figure 6.1: Visual representation of the speaker's IP67 waterproof and dustproof capabilities.
7. Troubleshooting
If you encounter issues with your speaker, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on | Low battery; Power button not pressed long enough | Charge the speaker; Press and hold the Power button for 2 seconds |
| No sound | Volume too low; Device not paired; Speaker muted | Increase volume on speaker and device; Re-pair Bluetooth; Check device mute settings |
| Bluetooth pairing fails | Speaker too far from device; Device Bluetooth off; Interference | Ensure speaker is within 1 meter; Turn device Bluetooth on/off; Move away from other wireless devices |
| Poor sound quality | Low battery; Device too far; Obstructions | Charge speaker; Move device closer; Remove obstructions between speaker and device |
| TWS pairing fails | Speakers not in pairing mode; Already connected to another device | Ensure both speakers are disconnected from other devices; Follow TWS pairing steps carefully |
8. Specifications
Detailed technical specifications for the Sharp GX-BT390 Bluetooth Speaker:
| Feature | Specification |
|---|---|
| Model Name | GX-BT390(K) |
| Speaker Type | Outdoor, Portable Bluetooth Speaker |
| Connectivity Technology | Bluetooth |
| Wireless Communication Technology | Bluetooth |
| Speaker Maximum Output Power | 60 Watts (30W RMS) |
| Audio Output Mode | Stereo (with TWS pairing) |
| Special Features | Bass Boost, Built-in Microphone, Dustproof, LED Light, Lightweight |
| Water Resistance Level | IP67 (Waterproof and Dustproof) |
| Power Source | Battery Powered (1 Lithium Ion battery included) |
| Battery Life | Up to 10 hours |
| Maximum Range | 33 Feet (10 meters) |
| Control Method | Touch Buttons |
| Product Dimensions | 4"D x 8.5"W x 4"H (10.16 cm D x 21.59 cm W x 10.16 cm H) |
| Item Weight | 1.75 pounds (28 Ounces) |
Figure 8.1: Internal component diagram illustrating the speaker drivers responsible for 30-watt rich bass and powerful sound.
9. Warranty and Support
The Sharp GX-BT390 Bluetooth Speaker comes with a Limited Warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support or service inquiries, please contact Sharp customer service through their official website or the contact information provided with your product documentation.
