The XH-M422 TPA3116D2 Bluetooth Audio Amplifier Board is a high-power, multifunction digital amplifier module designed for DIY audio systems, home audio upgrades, portable speakers, and car audio projects. Powered by the reliable TPA3116D2 Class-D amplifier chip, this board delivers clean, powerful, and efficient stereo output up to 50W x 2 channels while maintaining low distortion and excellent sound clarity.

This Bluetooth amplifier board supports multiple audio input modes including Bluetooth 4.2 wireless streaming, USB U disk, and TF card playback, allowing standalone music playback without any external audio source. It supports popular audio formats such as MP3, WAV, APE, and FLAC, making it ideal for high-quality digital audio applications. With a wide DC input range of 12V to 24V, the XH-M422 amplifier offers flexible power options for different setups.

The compact and integrated design makes this module easy to install in custom enclosures, speaker boxes, or amplifier cases. Built-in protection features such as over-temperature, over-current, and short-circuit protection ensure long-term stable and safe operation, even under high load conditions.

Features:

• High-power dual-channel stereo output up to 50W x 2

• Original TPA3116D2 Class-D amplifier chip for high efficiency

• Integrated Bluetooth 4.2 for wireless audio streaming

• Supports USB U disk and TF card direct audio playback

• Compatible with MP3, WAV, APE, FLAC audio formats

• Wide DC input voltage range from 12V to 24V

• Low distortion and high signal-to-noise ratio for clear sound

• Compact board size for easy integration into DIY projects

• High efficiency design with low heat generation

• Built-in over-temperature, over-current, and short-circuit protection

• Suitable for 4Ω to 8Ω speakers

• Ideal for home audio, portable speakers, and car audio systems

Specifications:

• Model: XH-M422

• Amplifier Chip: TPA3116D2

• Amplifier Type: Class-D

• Bluetooth Version: 4.2

• Power Supply: DC 12V – 24V

• Output Power: 50W x 2 (dual channel)

• Speaker Impedance: 4Ω – 8Ω

• Audio Input Modes: Bluetooth, USB U disk, TF card

• Supported Audio Formats: MP3, WAV, APE, FLAC

• Frequency Response: 20Hz – 20kHz

• Signal-to-Noise Ratio (SNR): ≥100dB

• Total Harmonic Distortion (THD): ≤0.1%

• Protection: Over-current, over-temperature, short-circuit

• Board Dimensions: Approx. 90mm x 70mm x 25mm

Connectors and Interfaces:

• DC Power Input Jack for 12V–24V supply

• Screw terminals for left and right speaker output

• USB port for U disk audio playback

• TF card slot for direct music playback

• Onboard Bluetooth antenna for stable wireless connection

How to Use:

• Connect a suitable DC power supply (12V–24V) to the power input

• Attach 4Ω–8Ω speakers to the output terminals with correct polarity

• Insert a USB flash drive or TF card with supported audio files, or enable Bluetooth on your device

• Pair your smartphone, tablet, or PC via Bluetooth and start audio playback

• Control volume and playback from the connected Bluetooth device or onboard controls if available

Applications:

• DIY audio amplifier projects

• Home stereo speaker systems

• Portable Bluetooth speaker builds

• Car audio amplifier upgrades

• Desktop and workshop audio systems

• Educational and electronics hobby projects

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