I'm asking if it matters for my individual setup. I assume that it pushes more air because it's bigger but is there a certain amount of area you should have in front of the port on your enclosure for either size sub? If I get the 15" my enclosure will be 18"H x 34"W x 20 3/8"D , 48 sq. in. port area , 4 cu. ft. net volume. If I get the 18" my enclosure will be 21"H x 36"W x 21" D , 66.5 sq. in. port area , 5 cu. ft. net volume.
Either way I will only have 2" to 2 1/2" of free space in front of the port on either size enclosure. So does it matter which size I get? Or should I even be doing this at all? My trunk is only 23 1/4" Deep.
Will I be wasting the potential of these subs with only 2 inches of free space in front of either enclosure?
While I have your attention I need to know if I will have to upgrade my 135 amp alternator and big 3 in order to run 1500-1800 watts through the 1800w Amplifier I have in my '97 Grand Marquis?
to be honest i think if u went with 2 12's and made a tuned box, it would be louder then either of those setups. and for your electrical u should be fine, big 3 isnt that big of a gain, its more overhyped then anything. do 2 runs of 0 awg or even 4 awg and that should be more then plenty, if your worried about your lights dimming then add an extra battery in the trunk.
Sounds good man thanks for the input! I'd go with the 12's but I already ordered the 15" lol. It'll be nice though. I'm gonna hook it all up once I find a good box and see how everything goes and if my lights dim i'll just grab an extra battery then.