Description
This tone board is a preamplifier and power amplifier. It has 5 times preamplification and a power LED indicator. It is powered by dual AC 12V-22V. The recommended voltage is double 15V to 20V. The power supply is regulated by an LM337 and an LM317.
This tone board contains 5 times preamplification as well as treble, midrange, bass, volume control; LED power indicator is added to the board.
Power supply voltage: dual AC 12V-22V
Recommended voltage double 15V to 20V
Power supply voltage regulation adopts LM337; LM317 high precision voltage regulator
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