1.UPC1237 best performance as core devices, with power-on delay and DC protection, power anti-shock function
2.Use OMRIN original high-current relay as the core of the device is not afraid of contact ignition and oxidation
3.Using 7812 as a regulator, wide supply range, up to any range AC12V to AC24V
4.Circuit is simple and reliable. Produced very easily, no need debugging
6.Precision CNC double-sided circuit board tin small size, easy installed
7.Start delay 1S closed, no need to use 3S delay. DC monitoring and protection, real-time protection speaker. Disconnect the speaker off instantly.
8.This version can be controlled 500W amplifier, each channel using a relay control.
9.Power: AC 12-24V
10.PCB size: 6.9cmx57mm
Note:All the elements, you need to solder it by yourself
1 x Dual Relay 7812+UPC1237 Speaker Protection Board Kit