All resistors are 1% precision metal film resistors, capacitors for Nikon, ruby fever capacitance, polarity Philips CBB, 1UF capacitor using German WIMA capacitors. The new imported 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: Green Material: plastic Output power: 80W (undistorted rated power) and peak 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 DC voltage 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 KB Note: spare parts, buyers need to self-welding. Package Included: 1x TDA7294 Amplifier Kits Note: Light shooting 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.