So im looking to replace the speakers in my car cuz they crackle and pop and i cannot enjoy my music cuz i dont turn it up high because of those reasons.Now i want this to be easy and fast and dont want to cut and all that stuff just remove and replace.Now the stock speakers are 6 1/2 all around but i was told if you want to put speakers in the rear you will have to remove the panels in the back which i do no want to do.Can i go a size lower so i wont have to do that?