I have a 2005 Mazda 6 with the Bose System (6-disc, blah blah...) anywho, awhile back I purchased this enclosure made by Lightning Audio. http://www.cardomain.com/item/LITBCKT110150 I know it's not much but I just want a little more bass and for only $50, it has gotten good reviews... basically what I wanna know, is there anything I shouldn't do or watch out for before installing this. I don't want this to be an expensive lesson and have no problem reading threads, but I just don't know where to start cause I don't know anything about installing stereos. I have a friend, he use to compete and do shows, that is willing to install it but he hasn't done so since high school (four some years ago.) Any advice would be greatly appreciated. Btw, can this be "bridged" to the factory system?