ThatOneCat__

I recently got gifted a used JBL ES250P for free. I was told it was functional when it was last used; however, I have been unable to get sound out of it. Some of my basic troubleshooting and observations are below:

The light is on and I hear a quiet low buzz when a cable is plugged into the RCA inputs.

It is hooked up to my computer via the line out into an auxiliary splitter, with one output going to my monitors and the other output going to the sub.

The cable works, as I have tested it on my monitors.

Sound is coming out of my monitors (also hooked up to the splitter)

The phase is set to 0°, and the input is set to normal. The crossover is set to 50 Hz, the level on the sub is halfway