Hey Guys,
I am currently piping audio signal from the input side of the stock amp all the way to a potentiometer under the steering wheel to control the sub woofer amp input signal. The issue is that they like to die. I found this sweet digital volume control board that I am planning to implement. Pictures/write will follow.
https://www.amazon.com/dp/B01LXXGDX3?psc=1
