All resistors are 1% precision metal film resistors, capacitors for, ruby capacitance, polarity, 1UF capacitor using WIMA capacitors. New chip TDA7294; KB level PCB, all the components have been marked on the silkscreen board, easy to install DIY friends. Front-end rectifier filter after the power input terminal (note that the polarity of the supply voltage cannot be reversed, otherwise the chip burns) on the right side of the mono output. The circuit TDA7294 compatible with the board, the key is to place the capacitor C4, the board indicated, this design is the main feature of the restaurant board. Note that the chip is connected to the negative voltage of the case, well insulated between the chip and the heat sink fins, otherwise it met the negative voltage due to failure or other cause of circuit burnout IC Color: Green Material: plastic Output power: 80W (undistorted rated power) and power 100W (+/- 35V 8 ohms load corresponding speaker impedance 4-8 ohms, the circuit is a standard circuit, stable and. Supply voltage: recommended dual 26V/100W or more toroidal transformer, rectified about double 35V)If recommended to use two components consisting of a 200 ring cattle dual channel stereo. (DC dual 30-40V)PCB size: 40*60*1.6MM double-sided KB sheetNote: spare parts, need self-welding. Package Included: 1x TDA7294 Amplifier KitsNote: The light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3cm.