XH-M422 TPA3116D2 Bluetooth Amplifier Board U disk TF Player Amp Boards Dual Channels 2*50W DC12V-24V

The XH-M422 is a compact dual-channel Class D amplifier board featuring the TPA3116D2 integrated circuit, delivering 2x50W of high-fidelity audio amplification at 4 ohms. Professional audio engineers, DIY enthusiasts, and embedded systems developers use this board to build wireless speaker systems, car audio upgrades, and portable sound solutions with integrated Bluetooth connectivity and USB/TF card playback capabilities. This board solves the critical challenge of combining wireless audio reception, local media playback, and powerful amplification in a single compact form factor without requiring external DACs or complex signal processing chains.

Product Overview

The XH-M422 amplifier board leverages the TPA3116D2 Class D amplifier IC, which utilizes advanced pulse-width modulation technology to achieve exceptional power efficiency and minimal thermal dissipation. The Class D topology converts analog audio signals into high-frequency PWM signals that drive the output MOSFETs with minimal loss, enabling 2x50W continuous output power from a single 12V-24V DC supply. The integrated Bluetooth 5.0 module enables wireless audio streaming from smartphones, tablets, and computers, while the onboard USB and TF card reader provides standalone playback functionality without requiring external host devices, making this board ideal for autonomous audio applications.

The board features a complete audio signal chain including Bluetooth receiver, USB/TF card decoder, analog input amplifier stage, and dual-channel power amplifier output. The TPA3116D2 IC incorporates integrated protection circuitry including thermal shutdown, DC offset detection, and overcurrent limiting, ensuring reliable operation across varying load conditions and temperature ranges. The wide input voltage range of 12V-24V DC accommodates diverse power supply options from automotive systems, battery packs, or industrial power supplies, while the dual 50W output channels drive 4-8 ohm speakers with low harmonic distortion and excellent frequency response linearity from 20Hz to 20kHz.

Key Specifications

Specification	Details
Product Type	Dual Channel Class D Bluetooth Amplifier Board
Amplifier IC	TPA3116D2
Output Power	2x50W at 4 ohms, 12V-24V DC supply
Amplifier Class	Class D (High Efficiency)
Input Voltage Range	DC 12V to 24V
Bluetooth Version	Bluetooth 5.0
Audio Playback Sources	Bluetooth wireless, USB flash drive, TF/microSD card
Frequency Response	20Hz to 20kHz
Total Harmonic Distortion	Less than 1% at rated power
Signal-to-Noise Ratio	Greater than 90dB
Output Impedance	4 to 8 ohms per channel
Analog Input Sensitivity	500mV to 2V RMS
Board Dimensions	Approximately 120mm x 90mm x 30mm
Operating Temperature	-10°C to 60°C
Protection Features	Thermal shutdown, DC offset protection, overcurrent limiting
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• TPA3116D2 Class D Amplifier IC delivering 2x50W continuous power output with exceptional efficiency and minimal heat generation, ideal for battery-powered and portable applications
• Integrated Bluetooth 5.0 wireless audio receiver enabling seamless pairing and streaming from smartphones, tablets, and computers with extended range and stable connectivity
• Dual playback modes supporting USB flash drive and TF/microSD card media, allowing standalone operation without requiring external host devices or internet connectivity
• Wide input voltage range from 12V to 24V DC accommodates automotive systems, industrial power supplies, and battery packs with automatic voltage regulation and protection
• Complete protection circuitry including thermal shutdown at 150°C, DC offset detection, and overcurrent limiting prevents damage from short circuits or thermal stress
• Compact PCB design with integrated passive components reduces external component count and simplifies system integration into custom enclosures and applications

Applications and Use Cases

• Portable Bluetooth Speaker Systems: Build compact wireless speakers for home entertainment, outdoor events, and travel by pairing this amplifier with passive speakers and battery power supplies
• Car Audio Amplifier Upgrades: Integrate the XH-M422 into vehicle audio systems to amplify factory head unit signals or add independent subwoofer amplification with 12V automotive power
• Smart Home Audio Distribution: Create wireless audio zones throughout residential or commercial spaces by deploying multiple amplifier boards with networked Bluetooth receivers
• Industrial Sound Systems: Implement background music and public address systems in factories, warehouses, and commercial facilities using TF card playback for continuous loop audio
• DIY Audio Projects: Hobbyists and makers utilize this board to construct custom audio amplifiers, guitar amplifiers, and musical instrument amplification systems with Bluetooth control
• Embedded System Audio Enhancement: Add high-quality audio output to microcontroller projects, single-board computers, and IoT devices requiring amplified speaker output

How to Use

Begin by verifying your power supply delivers 12V-24V DC with adequate current capacity (minimum 10A recommended for full 50W output per channel). Connect the positive and negative DC power terminals to the board's power input, observing polarity carefully to prevent damage. Connect your speaker loads to the left and right output terminals, ensuring speaker impedance falls within the 4-8 ohm range per channel. For Bluetooth operation, enable Bluetooth on your source device and search for the XH-M422 device name, then select and pair to establish wireless audio streaming. For USB or TF card playback, insert your media into the respective ports and use the onboard buttons or remote control to select tracks and adjust volume.

To optimize audio quality, adjust the input sensitivity using the onboard potentiometer if connecting analog line-level sources, rotating clockwise to increase sensitivity for weak signals or counterclockwise to prevent distortion from hot signals. Ensure adequate ventilation around the board to allow heat dissipation from the output MOSFETs during sustained high-power operation. Monitor the board temperature during initial testing, as the TPA3116D2 includes thermal shutdown protection that will automatically reduce power output if internal temperature exceeds 150°C. For best results with TF cards, format media in FAT32 file system and organize audio files in standard directories to ensure reliable playback recognition.

Frequently Asked Questions

What is the maximum output power and at what impedance is it rated?

The XH-M422 delivers 2x50W continuous RMS power output at 4 ohms per channel when supplied with 12V-24V DC power. At 8 ohm loads, output power reduces to approximately 2x30W. These ratings represent continuous power into resistive loads with total harmonic distortion less than 1 percent, measured at 1kHz reference frequency.

Can I use this amplifier board with 8 ohm speakers instead of 4 ohm speakers?

Yes, the XH-M422 is designed to work with speaker loads ranging from 4 to 8 ohms per channel. With 8 ohm speakers, output power reduces to approximately 30W per channel but the amplifier operates safely within its design specifications. Using lower impedance speakers than 4 ohms is not recommended as it may trigger overcurrent protection or reduce amplifier lifespan.

What audio file formats does the TF card player support?

The onboard TF card decoder typically supports common audio formats including MP3, WAV, FLAC, and APE files. For best compatibility, format your microSD card in FAT32 file system and organize audio files in a single folder structure. Some boards may have firmware limitations with certain FLAC variants or high-resolution audio, so testing with your specific media is recommended.

How do I switch between Bluetooth, USB, and TF card audio sources?

Most XH-M422 boards include onboard buttons or a remote control to select between input sources. Typically, pressing the mode button cycles through Bluetooth, USB, and TF card modes. The active source is indicated by LED indicators on the board. Some variants may auto-detect the connected source and switch automatically when you insert USB media or power on the device.

What is the input voltage range and can I use a 48V power supply?

The XH-M422 is rated for 12V to 24V DC input voltage. Using voltages outside this range, such as 48V, will damage the onboard voltage regulators and power amplifier IC. Always verify your power supply delivers voltage within the specified 12V-24V range before connecting to the board.

Does the board include Bluetooth 5.0 and what is the wireless range?

Yes, the XH-M422 features Bluetooth 5.0 connectivity, which provides improved range compared to earlier Bluetooth versions. Typical wireless range is 10-20 meters in open space, though walls and obstacles reduce effective range. Bluetooth 5.0 also offers faster pairing, more stable connections, and better interference resistance compared to Bluetooth 4.2.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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Buy XH-M422 TPA3116D2 Bluetooth Amplifier Board U disk TF Player Amp Boards Dual Channels 2*50W DC12V-24V Online in India

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