I have the alpine system, but I wanna upgrade the speakers while retaining the factory amp(for now that is). I wanna replace the speakers and later down the road replace sub with two subs and amps with a converter cuz I want to keep stock head unit. Now with the speakers. I’ve read on here that the front side dash speakers are the highs while the front doors are the mids. So I’m thinking of a component set for these. Woofers in the doors and tweeters up front. Can the tweeters handle that? Also the rear doors and headliner speakers. I was thinking of doing the same for back there. Center channel up front I’m thinking a 3.5 coaxial speaker, possibly just keeping stock since when I upgrade to aftermarket amps I won’t even wire it up. It’s hard to find all of the answers to my questions in a single article or at all really. Does anyone have a link to the specs of the stock amp? Has anyone done the two component sets like I mentioned above? Or should it be like this- all three dash speakers be 3.5 coaxial, front doors are component set with the woofers in the front doors and the tweeters in the headliner in the back, then 6x9 coaxial in the back doors? Also plan on installing dynamat in areas as well. Reason I want to retain stock head unit is i bought the truck used. It came with nav and back up camera and I don’t wanna lose them. I don’t have the activation code for the nav which if I understand correctly. if I even hard reset my radio I would have to purchase the code again. Could be wrong on that tho. Hopefully my post isn’t an eye rolling one and I can get some friendly help. Thanks all.