Mono Channel Amplifier Board High Power 500W Efficient HiFi Power Amp Board with Fan for 10‑18in 4‑8 Ohm Speakers

Feature: 1. Basic Parameters: The rated power supply voltage of the power amplifier board is + 70V of dual power supply, and the voltage can work normally between + 55 to + 80V (excluding overvoltage burnout!) 2. Power Supply: The power supply is recommended to be a power supply with a good filter of + 70V DC dual power supply. Speakers are recommended to use 10‑18 inches 4 ohms‑8 ohm speakers. 3. Short Circuit Protection: Although the sound output has short circuit protection, try not to short circuit it. Do not connect the positive and negative poles of the power supply wrongly to avoid burning the board. 4. 50X Magnification: The voltage magnification of this board is fixed at 50X. If the output power is not enough, the pre amplification will be added according to the specific situation. 5. Note: Please check carefully before turning on the power to ensure that the wiring is correct before turning on the power. Specification: Item Type: Power Amplifier Board Material: PCB Size: Approx. 27 x 43 x 96mm 1.1 x 1.7 x 3.8in Supply Voltage: Dual DC Power Supply + 55 to + 80V Rated Output Power: 500W (+ 70v Power Supply 4 Ohm Load, Distortion 1percent ) Efficiency: >=90percent Signal to Noise Ratio: 90dB Total Harmonic Distortion: 380W (+ 70 Power Supply 4 Ohm Speakers, Distortion <0.1percent ) 280W (+ 70 Power Supply 8 Ohm Speakers, Distortion <0.1percent ) Frequency Response Range: 20Hz 20KHz Speaker: 4 8 Ohm Voltage Magnification: 50 Times Input Sensitivity 1V (RMs) Output Short Circuit Protection: Yes Output DC Bias Protection is Speaker Protection: Yes Over Temperature Protection: Yes, the Heat Sink Fet Temperature is Higher Than 100 celsius , the Output is Turned off. Package List: 1 x Amplifier Board Note: 1. Attention: According to the power formulas P=UxU R=voltagexvoltage load, the power is determined by the voltage and the load. The higher the voltage and the smaller the load, the greater the power. The supply voltage range of the board refers to this The voltage boards within the range can work normally, but not all voltages and load power is as large as the marked power output. For example, 12V power supply 4 ohm load, the maximum power is 15W, and 8 ohms power maximum 7.5W; 24V power supply is 4 ohms, The maximum power is 50W, and the maximum power is 25W at 8 ohms; at any time, the power of the power supply must be greater than the power of the power amplifier, otherwise the high volume will not move, the power will be reduced and the sound will be cut off, and the corresponding power output will not be achieved.2. If it is a toroidal transformer, since it does not have the function of voltage regulation, the voltage will fluctuate with the power grid, please use it with a margin. 3. Please allow some errors due to manual measurement.