TPA3118D2 2×50W Bluetooth 5.0 Dual Channel Amplifier Board

TPA3118D2 Dual Channel 2×50W Bluetooth 5.0 Digital Audio Amplifier Board

Upgrade your audio setup with the TPA3118D2 Dual Channel Digital Power Amplifier Board — a compact, high-performance amplifier module delivering up to 50W per channel (100W total) at 24V. Whether you're building a home audio system, a DIY speaker project, or a custom sound installation, this board combines powerful output, Bluetooth 5.0 wireless connectivity, and robust built-in protections in a slim, easy-to-integrate package.

Made in Mainland China.

Key Features

• Dual Channel 50W+50W Output: Drive medium-to-high-power speakers with confidence — 50W per channel at 24V input, 25W per channel at 12V input.
• Bluetooth 5.0 & AUX Input: Connect wirelessly via Bluetooth 5.0 (device name: "HW-BT") or use the 3.5mm AUX audio jack for wired input flexibility.
• Wide Voltage Range (DC 12–24V): Works across a broad power supply range — 24V recommended for maximum output. Uses a standard DC socket interface.
• Built-In Protection Mechanisms: Integrated over-voltage, over-current, over-temperature, and short-circuit protection circuits keep your equipment safe during operation.
• Adjustable Volume Knob: Turn clockwise to increase volume, counterclockwise to decrease. The knob also powers the board off when turned fully counterclockwise.
• Compact & DIY-Friendly Design: Measuring just 80×50×15mm, this board fits easily into custom enclosures, speaker boxes, and DIY electronics projects.
• 4–8Ω Output Impedance: Compatible with a wide range of standard home and car speakers.

Technical Specifications

What's in the Box

• 1× TPA3118D2 Power Amplifier Board

Usage Tips

For Bluetooth use, enable Bluetooth scan on your phone or device and connect to "HW-BT". For wired audio, plug your source device into the 3.5mm AUX jack. Output terminals are labeled OUTR (right channel) and OUTL (left channel) for easy speaker wiring. Always use a stable DC 24V power supply for best performance.

For more information on safe electronics use and electrical standards, visit the U.S. Consumer Product Safety Commission (CPSC).

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Frequently Asked Questions

Q: What is the maximum output power of the TPA3118D2 amplifier board?

A: The TPA3118D2 amplifier board delivers up to 50W per channel (100W total) when powered by a 24V DC supply. At 12V, output is 25W per channel. For the best performance, use a stable 24V power supply rated at least 5A.

Q: How do I connect my phone to the TPA3118D2 via Bluetooth?

A: Simply enable Bluetooth on your smartphone or tablet, scan for available devices, and select "HW-BT" from the list. Once paired, your audio will stream wirelessly to the amplifier board. The board also supports a 3.5mm AUX input if you prefer a wired connection.

Q: What speakers are compatible with this amplifier board?

A: This amplifier board is compatible with speakers with an impedance of 4–8 ohms, which covers most standard home audio and DIY speaker systems. Make sure your speakers can handle the wattage output (up to 50W per channel at 24V) to avoid damage.

Q: Does the TPA3118D2 board have any built-in safety protections?

A: Yes. The TPA3118D2 chip includes integrated over-voltage, over-current, over-temperature (thermal shutdown), and short-circuit protection, making it a safe and reliable choice for DIY audio projects and custom speaker builds.