Product Name: V16 high power mono professional stage power amplifier board Size: 199MM X 83MM X 85MM Output power: 1000W 4-8Ohm Frequency response: 20HZ-20KHZ Harmonic distortion: 0.05% Signal to noise ratio: 92DB Supply voltage: DC dual 55-100V protection circuit AC single 12-18V (to be independently powered, can not be shared).