Features 1.The noise of the switch is small and has little effect on the speaker. 2.The zero-drift output voltage generally does not exceed 50 mV and is relatively stable. 3.There is no need to do any debugging after installation, and beginners have a high success rate. 4.The horn protection circuit can eliminate the impact noise of the power amplifier switch. 5.It also prevents the DC output from burning out the horn when the power amplifier is damaged. specificationFeatures: _x000D_ The noise of the switch is small and has little effect on the speaker. _x000D_ The zero-drift output voltage generally does not exceed 50 mV and is relatively stable. _x000D_ There is no need to do any debugging after installation, and beginners have a high success rate. _x000D_ The horn protection circuit can eliminate the impact noise of the power amplifier switch. _x000D_ It also prevents the DC output from burning out the horn when the power amplifier is damaged. _x000D_ _x000D_ : _x000D_ Operating Voltage: Recommended dual DC 10-45V dual DC 35V _x000D_ Rated Output Power: 100W (4 Ohm 35V) _x000D_ Maximum Output Power: 150W (4 Ohm 45V) huge heat, not recommended _x000D_ Spacing: Approx. 5.08mm / 0.20in _x000D_ Pitch-row Between Two Power Tubes: Approx. 47mm / 1.85in _x000D_ _x000D_ Package List: _x000D_ 1 x 2SC5200+2SA1943 Power Amplifier Board PackageList