TPA3116D2 XH-M548 Bluetooth Dual Channel 120W Digital Power Amplifier Board

The TPA3116D2 XH-M548 is a high-efficiency Class D digital power amplifier board delivering 120W of dual-channel audio output with integrated Bluetooth 5.0 wireless connectivity. Audio engineers, DIY enthusiasts, and professional sound system integrators use this board to build compact, high-power audio systems with minimal heat dissipation and distortion. This product solves the challenge of achieving studio-grade amplification in space-constrained applications while eliminating the need for wired audio connections through seamless Bluetooth streaming.

Product Overview

The TPA3116D2 XH-M548 amplifier board utilizes Texas Instruments' TPA3116D2 Class D amplifier IC, which operates on the principle of high-frequency pulse-width modulation to convert input signals into high-power output with exceptional efficiency rates exceeding 90 percent. The Class D topology eliminates the need for large heat sinks by converting audio signals into digital pulse trains that drive the output MOSFETs, resulting in minimal thermal losses compared to traditional Class AB amplifiers. The integrated Bluetooth 5.0 module enables wireless audio streaming from smartphones, tablets, and computers, while the dual-channel configuration allows independent left and right channel amplification with crossover frequency adjustment capabilities.

This XH-M548 variant features a complete audio processing chain including digital signal processing, volume control via Bluetooth remote, and protection circuits against thermal overload, short circuits, and DC offset. The board accepts both analog line-level inputs and Bluetooth wireless signals, making it versatile for retrofit applications in existing audio systems or new builds. The compact form factor measuring approximately 80mm x 50mm makes it ideal for embedded audio applications, portable speaker systems, and professional audio installations where space optimization is critical.

Key Specifications

Specification	Details
Product Type	Bluetooth Digital Power Amplifier Board
Amplifier IC	Texas Instruments TPA3116D2
Output Power	120W Dual Channel at 4 Ohms, 60W at 8 Ohms
Frequency Response	20Hz to 20kHz with less than 0.1 percent THD
Connectivity	Bluetooth 5.0, 3.5mm AUX Input, RCA Input
Supply Voltage	24V DC to 48V DC recommended, 12V to 50V operational range
Input Impedance	20k Ohms for analog inputs
Bluetooth Range	10 to 15 meters line of sight
Board Dimensions	80mm x 50mm x 25mm
Origin	Original and 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

• 120W Dual Channel Class D Amplification with less than 0.1 percent total harmonic distortion for clean, professional audio reproduction
• Integrated Bluetooth 5.0 Module enabling wireless audio streaming with stable connection and low latency performance
• Wide Supply Voltage Range from 12V to 50V DC allowing flexible integration with various power supply configurations and battery systems
• Multiple Input Options including 3.5mm stereo AUX jack and RCA connectors for compatibility with diverse audio sources
• Thermal Protection Circuitry with automatic shutdown at 120 degrees Celsius preventing component damage during extended operation
• Compact PCB Design measuring 80mm x 50mm enabling installation in space-constrained enclosures and portable applications
• Digital Volume Control via Bluetooth remote with 32 adjustable levels for convenient audio level management
• Low Power Consumption in idle mode extending battery life in portable speaker and wireless audio applications

Applications and Use Cases

• Portable Bluetooth Speaker Systems where the TPA3116D2 provides high-power amplification in compact form factors, delivering 120W output for room-filling audio from battery-powered enclosures
• Car Audio Amplifier Upgrades where engineers integrate this board with existing vehicle audio systems to replace factory amplifiers while maintaining Bluetooth connectivity and improving power output
• Home Theater Subwoofer Amplification for powering dedicated subwoofer drivers with precise frequency response control and wireless source switching capabilities
• Professional Audio Installation Projects where integrators use the TPA3116D2 in distributed audio systems, background music installations, and venue sound reinforcement with Bluetooth source flexibility
• DIY Audio Projects including custom speaker builds, amplified monitor systems, and experimental audio installations where makers require high-efficiency amplification with wireless connectivity
• Outdoor and Event Sound Systems where the board's robust thermal protection and wide voltage range support mobile PA systems and temporary event audio setups

How to Use

Begin by connecting your power supply to the XH-M548 board, ensuring the voltage falls within the 12V to 50V operational range with adequate current capacity of at least 10 amps for full 120W output. Connect your audio speakers to the output terminals, observing proper polarity and ensuring speaker impedance matches the board specifications for optimal performance. For Bluetooth operation, activate the board's Bluetooth pairing mode by holding the power button for three seconds until the LED indicator flashes blue, then pair your smartphone or audio device by searching for the TPA3116D2 device name in your Bluetooth settings.

For analog audio input, connect your audio source to either the 3.5mm AUX jack or RCA input connectors on the board. The volume control can be adjusted via the Bluetooth remote control app or through the physical potentiometer on the board if available. Ensure adequate ventilation around the amplifier board during operation, particularly when driving speakers below 4 ohms impedance or at sustained high volume levels. The board includes automatic thermal shutdown protection that activates at 120 degrees Celsius, so monitor operating temperature during extended use in warm environments. For optimal audio quality, use shielded audio cables for analog connections and maintain at least 10 centimeters distance from the amplifier to sensitive electronic components to minimize electromagnetic interference.

Frequently Asked Questions

What is the difference between Class D and Class AB amplification in the TPA3116D2?

The TPA3116D2 uses Class D amplification which operates at efficiency rates exceeding 90 percent by converting audio signals into high-frequency pulse-width modulated digital signals that switch output transistors on and off rapidly. This contrasts with Class AB amplifiers that use linear amplification with output transistors conducting continuously, resulting in efficiency rates of 50 to 70 percent and significant heat generation. The Class D topology in the TPA3116D2 produces minimal heat, requires smaller heat sinks, and delivers higher power output from the same power supply voltage compared to equivalent Class AB designs.

Can I use the TPA3116D2 XH-M548 with a 12V power supply?

Yes, the TPA3116D2 XH-M548 operates within the 12V to 50V range, but output power will be reduced at lower voltages. At 12V supply, you will achieve approximately 30W to 40W dual-channel output depending on speaker impedance and load conditions. For maximum 120W output, use a supply voltage of at least 36V to 48V with adequate current capacity. A quality 48V power supply with 10 amp minimum rating is recommended for full-power applications.

What speaker impedance should I use with this amplifier board?

The TPA3116D2 XH-M548 is rated for 4 ohm and 8 ohm speaker loads, delivering 120W at 4 ohms and 60W at 8 ohms. Do not connect speakers below 4 ohms impedance as this will exceed the maximum current rating and trigger thermal protection shutdown. For stereo operation, use two speakers of matching impedance, one per channel. Verify your speaker impedance rating before connection to ensure safe operation and optimal power delivery.

How do I pair the Bluetooth connection with my smartphone?

To pair the TPA3116D2 with your smartphone, first power on the amplifier board and hold the power button for three seconds until the LED indicator flashes blue, indicating Bluetooth pairing mode is active. Open your smartphone's Bluetooth settings and search for available devices. The TPA3116D2 will appear as a device name in your Bluetooth list. Select it to establish the connection. Once paired, the device will automatically reconnect when powered on in the future. You can then stream audio from any app on your smartphone through the amplifier.

What is the maximum continuous operating temperature for this amplifier?

The TPA3116D2 XH-M548 includes thermal protection circuitry that automatically reduces power output or shuts down the amplifier when the board temperature reaches 120 degrees Celsius. This protection prevents component damage from prolonged high-power operation in warm environments. To maintain safe operating temperatures, ensure adequate ventilation around the board, avoid blocking the component side with enclosure materials, and consider adding a small cooling fan if operating in ambient temperatures above 35 degrees Celsius at sustained high power levels.

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.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

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