All resistors are 1% precision metal film resistors, capacitors for , ruby fever capacitance, polarity , 1UF capacitor using German WIMA capacitors.The new TDA7294 chip; KB level PCB board, all components have been marked in the screen printing plate, easy to install DIY friends.The front-end rectifier filter after the power input terminal (note the supply voltage polarity can not be reversed, otherwise the chip burn!) To the right of mono output.The board easily compatible TDA7294 chip, the key is C4 capacitor placement, the board has indicated, this design is a major feature of the restaurant board.Note that the chip is connected to a negative voltage of housing, please well insulated between the chip and heat sink fins otherwise easily met with a negative voltage due to malfunction or other cause IC circuit burned, remember! !Color: GreenMaterial: plasticOutput power: 80W (undistorted rated power) and power of 100W (+/- 35V 8 ohm load Suitable speaker impedance 4-8 ohm, the circuit is the official standard circuit, stable and reliable. Supply voltage: Recommended Dual 26V / 100W or more toroidal transformer, rectified of about double 35V) If the two pieces composed of dual-channel stereo is recommended 200W ring cattle. (DC dual 30-40V)PCB size: 40 * 60 * 1.6MM double-sided sheet KBNote: spare parts, need to self-welding.Package Included: 1x TDA7294 Amplifier KitsNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.