Description: Product: 2.0 channel amplifier board,Two pairs of imported disassembled A1633 C4278 amplifier tubes. The capacitors are ELNA2700UF35V disassembled capacitors, which have sufficient voltage resistance and capacity. DIY Board: The amplifier board features simple wiring, making it particularly suitable for DIY audio projects.Feature: Subwoofer power amplifier board boasts good performance, good sound quality, clear high pitch and powerful bass.Compact: Measuring5.51''x5.91''x2.36'' in size, this compact amplifier board can be easily installed in various audio setups.Deisgn:The Audio Amplifier Module is designed with a microphone input, which can be used as a megaphone, and a fan is added to ensure that it can effectively help dissipate heat at full power. Specification: Model: Double 100WWorking voltage: double group AC18-26VMaximum power:100W+ 100WImpedance:4~8Working voltage: between 18V-26V for two groups of AC100W or more on transformerPotentiometer spacing: 2.4cmIC type: imported disassembled tube A1633 C4278 Size Chart: 14cmx15cmx6cm/5.51inchx5.91inchx2.36inch Package Includes: 1 Amplifier Board Note: Please allow slightly errors due to manual measurement and different monitors.