Hi guys, noob here lol!
I have an Alpine PDX-V9 amplifier to power my Alpine SPR-60C front splits, SPR-60 rear coaxials, and SWR-12D4 subwoofer.
For the subwoofer settings, I know I want to set the subsonic filter to 25hz-30hz and low pass filter to 80hz-100hz.
What I'm confused about is the...