mite just put new head unit in and keep the spekaers as u say they are top notch for standard one's ! would putting 6*9s on the parcel shelf create more volume then ? can u get the silver side plates for the dash
Putting extra speakers in the system running off the same built in amp will not increase volume - twice as many speakers, half the power to each one. Would you splice them into the rear door speakers?
Silver side plates? You mean like a fascia adaptor?