JBLnTruck

will going from a 15" JBL GTO 300w rms sub in a sealed box to a 12" icon in a ported box be louder for spl

so 2 ports 13.25" each , right?

is 26.5"long for each tube or for both

i just went on car stereo.com and i have a 2 cu.ft. box and to tune it to 34hz with the sub being an icon 12 the round port would be 4" diameter and 11.72" long is this right

i need port dimesions for and icon 12 in a 2 cubic ft. box if you can tell me the rectangular port size and the circular port size for tunning to 34hz

how many cubic feet for an icon 12 and a 15 for a sealed box and what is the mounting depth on both of them

i already have a jbl 15 in it but i want it louder . i dont want to cut my cab out eathier . and i have about a 600-700 dollar budget and nothing over 2000watts rms total

i need a subwoofer or two that will fit in a 2cu.ft. sealed box with 6 1/2" of mounting depth and i would prefer two 12's but i am open to all suggestions. i like it to be more spl , i no it is a ported box but i would like SPL over SQ so i need help plz