TDA7293/TDA7294 Mono Panel Channel PCB Circuit Amplifier Bare Boards Features:Model: TDA7293/TDA7294Power Supply: Dual AC 15V to 36V (AC needs rectification and filtering) or DC positive and negative 18V to 50V. Dual 35V recommended (please note that this is not a double 35V transformer, there is a positive and negative 35V DC. And a double toroidal transformer 26V/200W is recommended, after rectification voltage about DC double 35V). Reminder: batteries can be used! (Must be a series battery.) Transformer power: the power of the power transformer should not be less than 200w when two channels are used. The power of the power transformer should not be less than 100W when mono. Filter rectifier: the sum of the two channels should not be less than 40,000 uF, the bridge rectifier is preferably 25A or more. Output Power: Maximum Output Power 85W Mid Voltage: Less than 1mV Load: Can promote large-scale standing speakers for home use. Heater: according to the supply voltage, the power supply has high temperature output and high power output. Plate material: FR4 double-sided fiberglass board, 2 amps copper, blue ink, double-sided spray can. Dimensions: 3.5x 5cm/1.38 x 1.97inchColor: as shown in the pictureQuantity: 1 PcNote: 1. Please allow 0-1cm error due to manual measurement. Pls make sure you do not mind before bidding.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1 x PCB Amplifier Bare Boards (Without Retail Package)