front= 4"
anything else is a PITA!

There is a pair in front and a pair in the rear behind the seat. I don't think you can add any to the rear doors. You probably could put more behind rear seat but why? Just get two good quality rears, a sub, maybe some tweaters for the dash and some 4" (I know it sucks) for the front. The key is a good amp that has strong power with speakers that can handle the load. If you have money get a component system. MB Quart has a 4" setup that isn't cheap.
fm is a terrible way to transmit digital music. You can get kenwood, pioneer, clarion with usb input or ipod input for mp3.
anything else is a PITA!
what???
There is a pair in front and a pair in the rear behind the seat. I don't think you can add any to the rear doors. You probably could put more behind rear seat but why? Just get two good quality rears, a sub, maybe some tweaters for the dash and some 4" (I know it sucks) for the front. The key is a good amp that has strong power with speakers that can handle the load. If you have money get a component system. MB Quart has a 4" setup that isn't cheap.
fm is a terrible way to transmit digital music. You can get kenwood, pioneer, clarion with usb input or ipod input for mp3.