Features 1、1. High Power Output: The 2.1 channel TPA3221 Power Amplifier Board delivers an impressive output of 100W per channel and 200W for the subwoofer, ensuring a powerful audio experience that enhances your music and movie enjoyment. 2、2. Wide Compatibility: This Power Amplifier Board is designed to support speakers with impedance ranging from 3-8 ohms for the left and right channels (up to 100W) and 2-8 ohms for the subwoofer (up to 200W), making it perfect for various audio setups. 3、3. Multiple Input Options: Equipped with versatile input methods including BT, AUX, USB, and sound card, this Power Amplifier Board allows you to connect your devices effortlessly, giving you the flexibility to enjoy your favorite tunes in any way you prefer. 4、4. Advanced BT Connectivity: Featuring high-performance Jieli 5.1 Bt chip, the Power Amplifier Board offers a transmission distance of up to 15 meters, allowing you to stream music wirelessly without compromising on sound quality. 5、5. Robust Protection Mechanisms: The TPA3221 Power Amplifier Board is equipped with comprehensive protection features such as under-voltage, reverse polarity, overheat, overcurrent, and short circuit protection, ensuring safety and durability during operation. Specification Power input: 12-30V DC, recommended voltage 24V-28V, current 10A or above DC power supply Maximum power: left or right channel - 105W@30V, 4Ω; 55W@30V, 8Ω Subwoofer - 208W@30V, 2Ω; 105W@30V, 4Ω The higher the voltage, the lower the resistance, the greater the output power Applicable speakers: left and right channels, support 3-8 ohms, speakers within 100W; subwoofer supports 2-8 ohms, speakers within 200W BT chip: Jerry 5.1, transmission distance 15M Input method: BT + AUX + U disk + sound card Number of channels: 2.1, left channel + right channel + subwoofer Amplifier chip: 2 TI original TPA3221 Protection mechanism: input undervoltage, input anti-reverse connection, overheating, overcurrent, short circuit protection Product net weight: 229g Product gross weight: 288g Product size: 10*10*2cm Packaging size: 13*11*7cm Package List 1 x PCB Board 1 x Power Adapter 1 x Screwdriver 5 x Knob Cap