yeah more on my story when i bought the system from car tunes they said hey we will throw in a loud box for free considering i ran up a 1200$ tab and it is loud, and it shakes everything, but i need something that is tuned lower more like 32hz instead of 39hz. i know how to make the boxes, i have built a t line and a regular ported box. i just dont know what ft3 i would need im guessing around 2-2.5 and what kind or port tuning to do. i would like to use the semi reliable re box calc so i can get the cuts and all that but i just lack those simple things. if anyone that has good expirence and results desgning boxes would care to do one for me id be so greatful for it, i would pay but i am pretty much broke. and what do you guys think my set up is capable of? spl wise if i did want to go to bass comps.