Features: Name: 2SC5200 and 2SA1943 amplifier board, 100W mono output, providing quality audional experience. Low noise: on-off noise is low and will not have a significant impact on the speaker. Voltage stabilization: The output 0 drift voltage generally does not exceed 50mV and is relatively stable, making it very reliable to use. Quality materials: Quality materials, stable and reliable in operation, with a certain degree of durability. Debugging free: As long as you install correctly and make no mistakes, it is basically one-time success without any debugging, friendly to beginners. Specifications: Material: Printed Circuit Board Board Size: about 80x50mm/3.14x1.96", and the height after welding is about 35mm/1.37" Working voltage: ±10V - ±45V (recommended voltage (+35V) -0- (-35V)) Rate output power: 100Wx1 Output power: up to 150Wx1 Input and output base spacing: 5.08mm Hole distance between two pipes: 47mm The transistors on board is 2SC5200+2SA1943 (disassembled) Package Includes: 1x 2SC5200+2SA1943 Power Amplifier Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.