box help...may pay for help

[tapout383]

i need you guys thoughs on this...im starting my new system here evenutally and was wondering which would be louder... two AQ HDC 12s or 1 18 HDC both will be ran off the same power supply which is two aq 2200s....the most box i can get would be 5 to 5.5 cubes tuned to around 38-40 hz ...i also used to have a DD 9515 with a 4.5 cube box tuned to 40 hz ran off a single 2200 and want to be out doing that by alot...also i may be getting a box design and some cut out sheets if your willing to make some

[2003BlackShark]

id like to run to AQ HDC3 18" in the back of my hatch one of these days bigger either way your car will beat crazy loud