hi there , i ask the same question as you . some month ago - and i went on a quest to make my own subwoofer .
i had posted a few info . and data on how subwoofer is made up .
if you search my user name you might find a few of them ..
is not as easy as just getting the parts .
matching them and also alot of device and machine is needed . to measure as well as
parts that is not open to the market .
you can of cos take a few subwoofer apart and mix and match .
resulting in a audioble subwoofer . but chances is that it will not sound really good or even perform well and risk damaging the amp .
i have a post on subwoofer parts if you search you might find it .
if you can find let me know i will get you the link .
one of the hard parts is to give the magnet it power .
the device relaly cost alot .
and i am lucky that a large factory is helping me out on this .
if you really keep in custom your subwoofer .
you can PM me and we can talk more on detail .
//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif good luck
anything is possible //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif is only as large as you dare dream //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
i am willing to help you in way that i can