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Speaker Protection Board, AC 12-24V UPC1237 Double Relay Voltage Regulator Circuit Module Speaker Audio Protection Board Module DIY Kit for Protecting Audio Amplifier : Electronics

 Speaker Protection Board, AC 12-24V UPC1237 Double Relay  Voltage Regulator Circuit Module Speaker Audio Protection Board Module DIY  Kit for Protecting Audio Amplifier : Electronics

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EXCELLENT PERFORMANCE: This dual relay voltage speaker protection board uses 7812 as a voltage regulator and has a wide supply voltage in range of AC

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Speaker Protection Board Module, AC 12-24V Audio Dual Relay Voltage Regulator Speaker Protection Board Module DIY Kit : Electronics

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