2.1-Ch Bluetooth Amplifier Board 200W TPA3116D2 MT21S
2.1-Ch Bluetooth Amplifier Board 200W TPA3116D2 MT21S
MT21S 2.1-Channel Bluetooth Audio Amplifier Board – 200W Total Power
Take your DIY audio build to the next level with the MT21S 2.1-Channel Bluetooth Amplifier Board. Powered by dual TPA3116D2 chips and delivering 50W + 50W stereo + 100W subwoofer output, this compact module packs serious audio performance into a 90 × 75.5 × 15 mm form factor. Whether you're building a home speaker system, karaoke setup, or custom audio project, this board handles it all with ease. Made in Mainland China.
Key Features
- Dual TPA3116D2 Chips: Industry-proven amplifier chips deliver clean, stable, high-efficiency audio output across all channels.
- 2.1-Channel Output: 50W + 50W for left/right stereo channels plus a powerful 100W subwoofer channel for deep, immersive bass.
- Versatile Inputs: Connects via Bluetooth (up to 15 metres), AUX, USB, and dual MIC inputs — all on one board.
- Dual Microphone Support: Accommodates two simultaneous wired or wireless microphone connections — ideal for interactive karaoke and multi-person setups.
- Wide Power Range: Operates on DC 12–24V / 8A or higher (AC power not supported), making it compatible with a wide range of power supplies.
- Multi-Layer Protection: Built-in overvoltage, undervoltage, overheating, DC detection, and short-circuit protection for safe, reliable operation.
- Low Power Consumption: High-efficiency Class D amplifier design keeps energy use low even at high output levels.
Technical Specifications
| Chip Model | TPA3116D2 × 2 |
| Channel Output | 2.1-Channel (50W + 50W + 100W) |
| Bluetooth Range | 15 metres |
| Input Methods | Bluetooth, AUX, USB, MIC (dual) |
| Power Supply | DC 12–24V / 8A or higher (AC not supported) |
| Compatible Speakers | L/R: 20–50W, 4–8Ω | Subwoofer: 100W, 4–8Ω |
| External Wires | 6 DuPont wires, approx. 30 cm |
| Product Dimensions | 90 × 75.5 × 15 mm |
| Protection Mechanisms | Overvoltage, Undervoltage, Overheating, DC Detection, Short Circuit |
| Country of Origin | Made in Mainland China |
Microphone Compatibility
- Supports wireless microphones (requires compatible receiver), condenser microphones, and dynamic microphones.
- Accommodates two simultaneous receiver connections or one dual-channel wireless microphone system.
- Wireless microphones with integrated receivers are recommended for lowest background noise.
What's in the Box
- Mainboard × 1
- Keypad × 1
- Microphone Board × 1
- Adjustment Knobs × 5
- Accessory Kit × 1
Pair It With Your Next Project
Looking for more components and accessories for your DIY builds? Check out our Airtight Transparent PET Storage Bottle for keeping small electronic components organized, or explore our Vintage Baroque Embossed Metal Tray as a stylish desk organizer for your workshop setup.
Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What power supply does the MT21S Bluetooth amplifier board require?
A: The MT21S amplifier board requires a DC 12–24V power supply rated at 8A or higher. AC power input is not supported. For best performance at full output, a higher-amperage DC power supply is recommended.
Q: What types of microphones are compatible with the MT21S amplifier board?
A: The board supports wired dynamic microphones, condenser microphones, and wireless microphones (when used with a compatible wireless receiver). It can accommodate two simultaneous microphone inputs, making it great for karaoke or multi-person setups.
Q: What speaker impedance and wattage is compatible with this amplifier module?
A: The left and right stereo channels support speakers rated 20–50W at 4–8Ω, while the subwoofer channel supports a speaker rated up to 100W at 4–8Ω. Always match your speaker ratings to avoid damaging the module or your speakers.
Q: Does the amplifier board support Bluetooth streaming?
A: Yes. The MT21S features built-in Bluetooth connectivity with a wireless range of up to 15 metres, allowing you to stream audio from your phone, tablet, computer, or other Bluetooth-enabled device without cables.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.