TPA3118 Bluetooth Stereo Amplifier Board 45W×2 | 12V–28V
TPA3118 Bluetooth Stereo Amplifier Board 45W×2 | 12V–28V
TPA3118 Bluetooth Stereo Digital Power Amplifier Board – 45W×2
Upgrade your audio project with this compact yet powerful TPA3118 Stereo Digital Amplifier Board. Delivering an impressive 45W per channel (90W total), this dual-channel amp module supports both Bluetooth wireless audio and a 3.5mm AUX input, making it ideal for DIY speaker builds, home audio systems, and custom electronics projects. With a wide supply voltage range of DC 12V to 28V, it works seamlessly with everything from 12V car batteries to 24V bench power supplies.
Built around the reliable TPA3118 chip, this board features multiple built-in protection mechanisms — overvoltage, undervoltage, overtemperature, DC detection, and short-circuit protection — so your speakers and components stay safe under demanding conditions. Bluetooth input takes priority by default, with automatic failover to AUX when no Bluetooth device is connected.
Made in Mainland China.
Key Features
- 🔊 Chip: TPA3118 Class-D digital amplifier
- ⚡ Output Power: 45W × 2 (stereo, two-channel)
- 🔋 Supply Voltage: DC 12V – 28V (wide-range compatible)
- 📶 Audio Input: Bluetooth (priority) + 3.5mm AUX
- 🔌 Output Impedance: 4–8 Ω speaker compatible
- 🛡️ Protection: Overvoltage / undervoltage / overtemperature / DC detection / short circuit
- 📐 Compact Size: 71 × 52 × 13 mm — perfect for tight enclosures
- 🆕 Condition: Brand new module
What's in the Box
- 1 × TPA3118 Bluetooth Stereo Amplifier Board
Perfect For
- DIY bookshelf and desktop speaker builds
- Home audio system upgrades
- 12V or 24V powered audio applications
- Custom electronics and maker projects
- Replacing worn-out amplifier boards
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: What voltage range does the TPA3118 amplifier board support?
A: The TPA3118 digital amplifier board supports a wide input voltage range of DC 12V to 28V, making it compatible with standard 12V, 19V, and 24V power supplies as well as 12V car or motorcycle batteries.
Q: Does this amplifier board have Bluetooth built in?
A: Yes! The board features integrated Bluetooth wireless audio input. Bluetooth is set as the default priority input. When no Bluetooth device is connected, the board automatically switches to the 3.5mm AUX input.
Q: What speaker impedance is compatible with this amp board?
A: This amplifier board is designed for speakers with an impedance of 4 to 8 ohms. It delivers up to 45W per channel in stereo two-channel configuration for a total of 90W output power.
Q: What protection features does the TPA3118 chip provide?
A: The TPA3118 chip includes comprehensive built-in protection: overvoltage, undervoltage, overtemperature, DC detection, and short-circuit protection, ensuring safe and reliable operation for your speakers and connected components.