According to the power formula P = u * U / r = voltage * voltage / load, the power is determined by the voltage and load. The higher the voltage is, the smaller the load is, the greater the power is. The board voltage range refers to the voltage within this range. The board can work normally. Not all voltages and load power are so high-power output as the standard. For example, 12V power, 4 ohm load, 15W power and 7.5W power at 8 ohm; 24V power 4 ¥Ø, power 50W, 25W at 8 ¥Ø; At any time, the power supply power must be greater than the power of the power amplifier, otherwise the high volume will not move, the power will be reduced and cut off, and the corresponding power output will not be achieved. 1. Electric voltage: double DC power supply ¡¾ 58 - ¡¾ 70V
2. Rated output power: 500W (¡¾ 65V, 4 ¥Ø load, distortion 10%)
3. Efficiency: > = 90%
4. Signal to noise ratio: 90dB
5. Total harmonic distortion: 380W (¡¾ 65 electric 4-ohm horn, distortion < 0.1%)
280W (¡¾ 65 electric 8 ¥Ø horn, distortion < 0.1%)
6. Frequency response range: 20Hz-20KHz
7. Horn: 4-8 ¥Ø
8. Voltage magnification: 36 times
9. Input sensitivity 1.5V (RMS)
10. Output short circuit protection: Yes
11. Output DC bias protection, i.e. horn protection: Yes
12. Over temperature protection: Yes, if the temperature of radiator FET is higher than 100 ¡Æ C, turn off output II. Precautions for use:
1. The rated electric voltage is ¡¾ 65V of dual power supply, and it can work normally when the voltage is ¡¾ 58 - ¡¾ 70V (if it exceeds 70V, it will not be burned, and it will not be covered if it is burnt out). If it is a ring cow, the voltage will fluctuate with the power grid because it does not have the voltage stabilizing function, please use it as a margin. Do not connect the positive and negative poles of the power supply incorrectly to avoid burning the board
2. The electric power supply is recommended to be DC dual power supply ¡¾ 65V, with good filtering
3. 10-18 inch 4-8 ¥Ø loudspeaker is recommended
4. Although the audio output has short circuit protection, try not to short circuit
5. Please check carefully before power on to ensure that the wiring is correct before power on.
7. The voltage magnification of this board is fixed at 40 times. If the output power is not enough, add the front stage amplification according to the specific situation.