Ok picked up a pair of 30hz Fmods, inline rca's, Now where to install? Best to install direct off head unit? or where the patch cables run into the first amp? Have 2 mono-block sub amps, second sub amp is running thru the RCA outs on first amp. I'm assuming as long as I have the fmods on the main line in, I wouldn't need a set for the lineout on the amp. Or does it really matter where it's installed? I'm guessing as close to the amp as possible, but I could be wrong(probably am)
Also the box is tuned @31hz, so will 30hz work ok? Couldn't find a set @31