Posted December 16, 200915 yr hey my jbl 1200 amp doesnt have a subsonic filter and im going to run a fi bl 18in in a ported box at 32 herts anybody know where i can buy a subsonic filter? and also what to set it at
December 16, 200915 yr I been searching all on the net for some, maybe its just to late and Im not searching right but I couldnt find anything for you. I know it is some out there, look up external subsonic filters.
December 16, 200915 yr Search for f mods, they are about 25 dollars and they go in line with your rcas. They have varying f mods depending on the frequency you need.
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