Description:This is a bass power amplifier board with preamplifier, bass frequency division processing and bass volume potentiometer control. It has a wide input voltage, high efficiency and high power. The board is already finished and tested and can be used directly after connected to speaker, audio input and power.Features:The amplifier board uses TPA3118 chip as core which is a high-performance digital power amplifier chip.Widevoltage power supply from 12V to 26V DC, energy saving design, the efficiency is high. Itcan be powered by a good performance switch power adapter, laptop switch power supply, transformer power supply after rectifying filter, rechargeable source or car power supply. Power supply of 24VDC and more than 5A is suggest in order to avoid distortion or intermittent sound.The board is already finished and tested and can be used directly after connected to speaker, audio input and power.Specifications:Input Voltage Range: 12V~26VDCOutput Power: 30W+30W(left+right channel) + 60W*1(subwoofer)Speaker Impedance: 4, 6, 8Size: 85 x 78mm / 3.34 x 3.07"Package Includes:1 x Amplifier Module