Bluetooth DIY Speaker Kit 3W+3W LED Spectrum Amplifier & Remote
Bluetooth DIY Speaker Kit 3W+3W LED Spectrum Amplifier & Remote
Build Your Own Bluetooth Speaker – DIY Electronic Kit with LED Spectrum Display
The LOTHYE Bluetooth Mini Speaker Making Kit is the perfect hands-on project for electronics enthusiasts, hobbyists, students, and makers. Assemble a fully functional stereo Bluetooth speaker from scratch — complete with a dual-channel 3W+3W amplifier, voice-activated LED spectrum display, USB music playback, and a remote control. The Bluetooth circuit board comes pre-soldered, so you simply wire it up and assemble the sound control board to complete the build.
⚠️ Please Note: This is a DIY assembly kit intended for buyers with circuit-building experience. All parts require self-installation. The seller guarantees parts are in good condition upon delivery but cannot guarantee 100% success post-assembly. Please read all instructions carefully before purchasing.
Key Features
- Dual-Channel Stereo Output: 3W + 3W (6W total) for clear, full-bodied sound
- Bluetooth Connectivity: Pair wirelessly with your smartphone — scan for "XCO46" and connect instantly
- Voice-Activated LED Spectrum: LEDs pulse and flow in sync with the music — the louder the sound, the brighter and faster the light display
- USB / U-Disk Playback: Plug in a USB drive to play music directly; automatically switches from Bluetooth to USB when disconnected
- Power-Off Memory: Remembers your last playback state after power is cut
- Remote Control Included: Conveniently manage playback without touching the unit
- Flexible Power Supply: Powered via USB (DC 4.2–5V); compatible with phone chargers, power banks, or a 5V computer USB port
- Pre-Soldered Circuit Board: The Bluetooth board arrives ready — just connect the wires and assemble
- Transparent Shell: Peel the protective film to reveal a sleek, see-through acrylic enclosure
Technical Specifications
| Amplifier Dimensions | 106 × 66 × 60 mm |
| Output Channels | 2 (Stereo) |
| Output Power | 3W + 3W |
| Power Supply Voltage | DC 4.2V – 5V (do NOT exceed 5V) |
| Rated Current | 1.5A – 2A (2A recommended for best audio quality) |
| Audio Sources | Bluetooth, USB / U-Disk |
| Includes | USB power cable, pre-soldered Bluetooth PCB, all kit components, remote control |
How It Works
The voice-activated LED display circuit consists of a power supply circuit, a microphone amplifier circuit, and an LED light-emitting indicator circuit. The MIC captures the audio signal, converts it to an electrical signal, amplifies it, and drives the LEDs — creating a dynamic, music-reactive light show that pulses with every beat.
Wiring Guide (Quick Reference)
- White terminal: Connect to the speaker
- Red terminal: Connect to the power supply
- Always follow the included product instructions strictly — incorrect wiring may prevent the amplifier from functioning correctly
Made in Mainland China.
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Frequently Asked Questions
Q: Does the Bluetooth speaker kit come pre-assembled or does it require full DIY assembly?
A: The Bluetooth circuit board arrives pre-soldered for your convenience. You will need to connect the wiring and assemble the sound control board yourself. A USB power cable and all required components are included in the kit. Basic circuit-building experience is recommended before starting assembly.
Q: What power sources are compatible with this DIY Bluetooth amplifier kit?
A: The kit operates on DC 4.2V–5V. It is compatible with standard 5V USB phone chargers, power banks (charging treasures), and 5V computer USB ports. For the best audio output, use a power supply rated at 2A. Do not exceed 5V, as this may damage the module.
Q: Can I play music from a USB drive if my phone's Bluetooth is disconnected?
A: Yes! The kit supports both Bluetooth and U-Disk (USB drive) playback. When Bluetooth is disconnected, the unit automatically switches to USB playback mode. It also features power-off memory, so it recalls your last playback state when powered back on.
Q: What does the voice-activated LED spectrum display do?
A: The LED spectrum display reacts dynamically to sound in real time. The louder the audio, the brighter and faster the LEDs illuminate — creating a visually engaging, music-synchronized light show that makes the speaker as fun to watch as it is to listen to.