PAC- TR-4 Low-Voltage Remote Turn-On Trigger (TR-4)

I have a graphic equalizer with no switch to turn it on. It does however have a place to connect a wire for remote turn on. Enter the TR-4 12volt turn on trigger. Instructions for wiring are included. Basically the TR-4 is connected via one lead to your radios speaker wire. A second lead goes to the remote connection on your equalizer. A third goes to 12+ that powers your setup. The fourth goes to vehicle ground or the black terminal if you’re using a power supply. When the radio is turned on there is enough DC voltage on the speaker line to trigger the TR-4 which turns on the equalizer