The TDA7492P Digital Amplifier Board is a high-performance, Bluetooth-enabled audio receiver module designed for DIY audio enthusiasts and speaker retrofitting. Built around the robust STMicro TDA7492P Class-D amplifier chip and a CSR Bluetooth 4.0 module, this board delivers powerful stereo sound with high efficiency.

This module allows you to easily convert old wired speakers into wireless Bluetooth speakers. It features dedicated onboard tactile buttons for playback control and a unique DIP switch interface to adjust the amplifier gain, ensuring compatibility with a wide range of speaker impediments. With a wide input voltage range (DC 8V-25V), it is versatile enough to run on laptop power supplies or 12V batteries.

Key Features:

• High-Quality Audio: Utilizes the TDA7492P power amplifier chip designed for high-end audio systems, providing clear, powerful sound.

• Bluetooth Connectivity: Equipped with a CSR4.0 Bluetooth module for stable, wireless audio streaming from smartphones, tablets, and computers.

• Adjustable Gain: Features an on-board DIP switch allowing you to adjust the gain directly (21.6dB, 27.6dB, 31.1dB, 33.6dB) to match different signals and speakers.

• Integrated Controls: Includes 5 onboard buttons for Play/Pause, Next Track, Previous Track, Volume +, and Volume -.

• Easy Connections: Features a standard 2.1mm DC barrel jack for power and screw terminals for speaker outputs, requiring no soldering for basic setup.

• Compact Class D Design: Highly efficient operation with minimal heat generation compared to analog amplifiers.

Specifications:

• Model: HW-339

• Main Chip: TDA7492P (STMicroelectronics)

• Bluetooth Version: CSR 4.0

• Supply Voltage: DC 8V - 25V (12V-19V recommended for best performance)

• Power Interface: 2.1mm DC Jack

• Audio Input: Bluetooth Receiver (primary) & 3.5mm AUX Jack

• Output Power: 25W + 25W (Dual Channel Stereo)

• Output Impedance: 4Ω, 6Ω, 8Ω, 16Ω (8Ω is ideal)

• Board Dimensions: Approx. 82mm x 50mm

• Weight: ~40g

Interface Description:

• Output: 2x Green Screw Terminals (Left Channel / Right Channel).

• Power: 1x DC Barrel Jack.

• Input: Bluetooth (Wireless) or 3.5mm Audio Jack.

• Control Buttons:

  • PLAY: Play/Pause

  • BACK: Previous Song

  • NEXT: Next Song

  • VOL+: Volume Up

  • VOL-: Volume Down

Package Includes:

• 1 x TDA7492P 25W+25W Bluetooth Amplifier Board