oh heres the deal im buyin a 15inch havoc, and im gonna build a box i got this prgram bassbox pro v6 and well it needs all these thigns and it asks for pe-which is in watts and it asks for xmax- which is in mm?? can anyone help a brother out?? and also it says dual 2 ohm voice coil, which is 2 voice coils right, but then when u read abotu it it says "The design is based around a large 3 inch diameter voice coil and a huge motor utilizing all high-tolerance machined steel parts. It uses dual spaced spiders to keep the cone and voice coil from rocking even when pushed to extreme levels. " does that mean one or what?? thx alot for the help guys i appreciate it