WEILIANG AUDIO A4 Fully Symmetrical Dual Differential High Power Amplifier Board/300W*2/ON Semi Conductor 0281/0302 nsistor

A: Kit parts, without radiator (heat diipation must be greater than 400 grams)

B: The finished board made of kit parts does not contain heat diipation

A4 is specially designed for users who need high-power output, demanding sound quality, and high-fidelity output. The output dynamic is very large, the low frequency is full and powerful, and the high frequency penetion is very good!

The default big tube is the American ON Semiconductor 0281/0302 nsistor

Schematic download addre:

http://pan.bu.com/s/1gfgF22B

If you buy a finished board with a heat sink, all s of the power amplifier board have been strictly tested. As long as the wiring is correct, it can produce sound without any user debuing. Level is fine! When properly matched, the sound quality of this amplifier is close to a few thousand yuan profeional.

-in power amplifier, reasonable ground wire layout, 40000UF filter , to ensure that the noise of the power amplifier board is very low

Because the power of the machine is relatively large, please register that the heat diipation must be installed and coated with thermal silica. This is a safety guarantee. The heat diipation is not tightly attached to the board under high power. The tube will be damaged.

【Output power】300W+300W (total 600W)

[Power input] AC dual 20-50V, speaker protection AC independent AC 11V to 18V can be

【Frequency response】20Hz-100KHz

【Dimensions】227X111mm

[Harmonic distortion]: