New AC 12-24V Dual Relay Voltage Regulator Speaker Protection Board Module .

New AC 12-24V Dual Relay Voltage Regulator Speaker Protection Board Module .

Feature: \n 1. This board uses 7812 as a voltage regulator and has a wide supply voltage in range of AC 12V to AC24V\n2. UPC1237 circuit as has power-on delay function, DC protection and power outrage damage protection function\n3. These two relays are original and of high current so you do not have to worry about contact ignition and oxidation\n4. Compact size, board size is only 6.9x5.7cm, and the circuit is reliable and simple to welded, no need to debug\n5. This version can be use to control 500W amplifier, each channel using a high grade relay control \n\nSpecification: \n\nDescription:\n\nThe speaker protection board has two main functions: to protect the audio amplifier and the loudspeakers during start-up sequence when the amplifier output might exhibit DC voltage, and to protect the loudspeakers in the unlikely event of an amplifier power stage failure, where DC component would damage the speaker voice coil. The of the speaker protection board is the UPC1237 dedicated ci:

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