The TPA3221 Double Channel Digital Power Amplifier Board delivers 120W per channel, making it ideal for car, computer, and home audio systems. It operates on a versatile 12V-32V power supply, allowing users to select the best voltage based on their speaker's power requirements. For optimal performance, the power supply should exceed the total speaker power by 20%. This amplifier features dual-channel parallel shielding to minimize sound frequency inductance loss, ensuring a balanced and clear audio output. Perfect for audiophiles, car audio enthusiasts, and anyone needing robust power amplification in space-constrained installations. The TPA3221 Double Channel Digital Power Amplifier Board is a high-performance audio solution. It is designed to provide exceptional audio quality and power efficiency. The amplifier is compact, with dimensions of approximately 6.7x10.9 cm / 2.64x4.29 inch, making it suitable for various installations. Please allow a 1-2 cm margin of error due to manual measurement. Color and detail may vary across different monitors, so the actual product may not match the picture perfectly. Color: Black Material: PCB Package Contents: 1* Power Amplifier Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.