Hey, currently i got a JVC deck in with stock fronts, and 2 6x9's that i put in myself. i just got another set of Alpine 6x9's and i was wondering how cna i wire this to get all the speakers going? thanks

 

you'd have to get an amp, or link them in series off the rear speakers that are there now... doing the 2nd option would make the whole rear sound like crap since it would decrease the power the head unit would put out. I say sell the cheaper of the two 6x9 sets and upgrade your front speakers. If you're looking for some bass, go with a single 10, not 6x9's