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This board uses 7812 as a voltage regulator and has a wide supply voltage in range of AC 12V to AC24V 2. UPC1237 circuit as core has power-on delay function ...

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 12V to AC ...

AC 12V TO AC 24V: This speaker protection board uses 7812 as a voltage regulator and has a wide supply voltage in range of AC 12V to AC24V; 500W AMPLIFIER: ...

Amazon.com: Dual Relay Voltage Regulator Speaker Protection Board Module DIY Kit, AC 12-24V, UPC1237 Circuit, High Current Relays, 500W Amplifier Control ...

Speaker Protection Board, Dual Channel Voltage Regulator Delay Module, AC 12-15V, UPC1237 ; Package Dimensions, ‎2.76 x 1.97 x 0.79 inches ; Item Weight, ‎1.94 ...

Rating 3.2

(2)

Compact size, board size is only 6.9x5.7cm, and the circuit is reliable and simple to welded, no need to debug. This version can be use to control 500W ...

Rating 5.0

(1)

Buy UPC1237 Dual Channel Speaker Protection Board AC 12‑15V Voltage Regulator Delay Protection Module with Power‑on Delay Function: Amplifiers - Amazon.com ...