Car audio ?

[FDF12389]

How do I know what LPF should be set at? Just change it around til its sounds right?

 

[LS20]

low pass is usually meant for signals fed to the subwoofer... in which case, the operating range is typically under 80hz... 60 to 120hz ... depends on the drivers

 

[hydroponik]

Try them all and see what sounds the best to you. I leave mine at 100 if you're curious

 

[Doodoo]

It all depends on your setup. I currently have two 12's and they're set to 80. When I had 10's I set it at 100.