i need box plans for (2) pioneer premier 2000spl's...i want it to be slot ported, and can't be taller than 10.5" but can be up to 41" wide, and 18" long...i also want it to be tuned to 33-34Hz.....i tried to do it but people said to use slot ports instead of round ports, and i don't know how to do this......any help would be greatly appreciated....