Posted December 15, 200816 yr So ive done a lot of searching around here at the forums looking for a good daily sub. I finally stumbled across FI's BL series and tried to do some research but just couldnt find the information that i was looking for. So i was looking into buying a BL15 with the pole chanfer and cooling options. So heres my questions. What would be a good size box and tuning frequency for higher output? Amp? And most importantly its output capabilities with spl oriented setup. everything will be going into a 93 Lincoln Town Car. any info would be greatly appreciated.