I just purchased a new 2018 SA and was having the same issues with the JL setup. After doing some research, thanks to previous posts about the ICE system, I found out the ICE system actually outputs 4V - (
https://www.enovationcontrols.com/ca...mpaign=1511740)
According to the JL AMP manual the input voltage should be set to
LOW for input ranges from 200mV - 2V and
HIGH for 800mV - 8V.
I switched the input voltage from LOW to HIGH and it made a huge difference. I lost some of the hiss and was able to adjust the gains correctly. The system sounds great now and no more distortion at very low volume settings.
Just in case it's needed here is a link to the ICE user and installation manuals.
https://support.enovationcontrols.co...Core-Expansion