Experience powerful and versatile audio amplification with this Dual Channel Digital Amplifier Board, designed around TI's high-performance TPA3116D2 chip. Operating on a flexible DC 12-24V single power supply, this amplifier delivers up to 50W per channel, providing clear and dynamic sound output for a wide range of speaker setups. Key Features: · Dual Channel Output: Provides robust and balanced stereo sound with a maximum output power of 50W per channel at 21V with 4Ω speakers, supporting multiple impedance options (4-8Ω) for flexible speaker compatibility. · Built-in Bluetooth Sound Receiver: Equipped with Bluetooth 4.2 technology, this amplifier board supports wireless audio streaming from compatible devices, offering a Bluetooth reception distance of over 8 meters (26.2 ft) for convenient connectivity. · Multiple Sound Controls: Customize your audio experience with dedicated bass, midrange, treble tritone potentiometers, plus volume adjustment and function control switches to fine-tune the sound to your preference. · Efficient and Power Saving Design: Achieves up to 90% efficiency, reducing power waste and heat generation. Compatible with various power sources including switching power supplies, rechargeable batteries, laptop power adapters, or car power supplies. · Easy to Use and Ready to Install: This fully assembled and tested amplifier board simplifies installation—just connect the appropriate speakers and power supply, then pair with your Bluetooth audio device or plug in an external sound input. · Flexible Source Input Options: The board defaults to Bluetooth mode but allows switching to source input mode by pressing the volume potentiometer switch when Bluetooth is disconnected, providing versatile usage for different audio sources. Specifications: · Material: PCB · Operating Voltage Range: DC 12-24V · Bluetooth Version: 4.2 · Bluetooth Reception Distance: >8m (26.2 ft) · Sound Source Input Sensitivity: 600-800mV · Frequency Response Range: 20Hz-20kHz · Speaker Impedance Support: 4-8Ω · Output Power:   - 12V, 8Ω Speakers: >10W x 2   - 12V, 4Ω Speakers: >15W x 2   - 21V, 8Ω Speakers: >30W x 2   - 21V, 4Ω Speakers: 50W x 2   - 24V, 8Ω Speakers: >35W x 2   - 24V, 4Ω Speakers: >60W x 2 Package Includes: · 1 x Digital Amplifier Board This Dual Channel Digital Amplifier Board delivers high-fidelity audio with outstanding efficiency and versatile connectivity options, making it an excellent choice for DIY audio projects, sound system upgrades, and professional use. Enhance your audio experience effortlessly with this reliable, easy-to-install amplifier solution.