Ok so i have recently traded and got a DC XL-18 M1, im not familiar with subs(never ran a DC). Im trying to come with with a good enclosure and will be using aeroports. (<- Saves me some hatch space for stuff) I did see that the DC site says 5.5 cf net for the 18's, but im not sure how to determine how much port i would need for it. My goal is for Daily with good SPL. Really i want it be loud lol. I tune at 40hz because it gives me MY perfect medium of daily and SPL(Thats just me) for the occasional comp. The formats are burps and the other is Music average for 2 different orgs. So i was thinking about going 5.5cf net with maybe a single 8" aero, but again im not sure. i did however do something like this before with a HDC3 18 in think 5.25 or .35 cubes net with 2 6" aeroports and had pretty good success IMO (147db on music average). So any thoughts or input is much appreciated. Again im using Aero's because i have to keep some hatch space Thanks in advance,