Features: The power supply adopts an efficient half bridge power supply, with 120V and 230V conversion switches suitable for global use, and the power margin is quite large, with lower ripple than traditional converter power supply. The power amplifier also uses MOS high current transistors output, and this model achieves a true 1%distortion of 350W, with amazing control power. The front stage adopts the leading technology in the subwoofer industry, utilizing dynamic EQ algorithm for high speed, low diving, and high control. We also designed a low cut, cutting off all frequencies under 15Hz and converting energy to the frequency ranges of 25Hz-60Hz, making it sound full of energy. This subwoofer board is made of solid materials and comes with an aluminum rear panel, which has almost no bottom noise, it is a rare subwoofer amplifier board in home cinemas. Specifications: Material: Plastic, Metal, Printed Circuit Board Plug Type: 2 kinds of plugs optional, refer to pictures to select please Size: Approx. 205x255mm/8.07x10.03inch Rate power: 350W Input voltage: AC120-240V Output impedances: 4-8Ω Suitable for 10-12 inches subwoofer speaker Package Includes: 1 Set 350W Subwoofer Amplifier Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.