I'm changing my setup for what seems to be about the umpteenth millionth time. I am going from 2 Skar EVL 12's in a single chamber 4 ft3 ported to 32 hz with 48 in2 vented to a larger box. I'm trying to stay below the window line as much as possible and have 37.5 w x 14.5 h x 26.5 d to use... I am hoping that I see a noticeable increase in bandwith and SPL with this larger box. Could anyone check my numbers as I cannot seen to get Torres working on my computer? I am targeting 5 ft3 net common chamber with 71.5 in2 28" long will this get me to 32hz? Externally will be 37.5 x 14.5 x 26.5 with 300 in3 of bracing displacement and .3 of driver displacement. I'm hoping to brace it well enough to stay with a single baffle if possible. Driver up/ port back will be the configuration. I've always done this myself but after being out and about seeing what other enthusiasts are attaining lately... " I was out of car audio for 15 years"... I was hoping for some help. 5 ft3 net with 71 in2 vented at 28 long, will I see a slight improvement maybe wider bandwith. It plays loud and sounds great now but I've gotten addicted to LOWZ and have re-tuned the small box to 28 hz using an extension on the port but the SPL suffers noticeably. Will the larger box have more extension on the low end over the small box and still SPL? Sorry about the long winded question but I couldn't seem to put it more concisely. I'm at 6.77 ft3 overall and I really don't want to go much larger. I still need to have port clearance unless I build it to the tailgate and port it upwards.