hey guys im going 3 cu ft for 2 level 3 12's what kind of tuning do you guys use for these for rap? keep in mind just cause its rap i dont want it to sound like muddy ***..lol id like it to be musical..each sub will be getting 500 watts..this will be my first time with ported and i dont know shit about port area, volume all that stuff..and im having the shop build the box for me and install it, so if you guys can give me some numbers i can write them down and hand them to the shop..by the way reason im going with 3 cu ft is cause on there website it says 1.5 per 12'' unless you guys know something that works better