HI! I have a bunch of questions

All questions are for a 2003 Chevy Cavalier, with a Stock stereo (am,fm,cd) and all stock speakers, no amp, or other stereo modifications.

1. What are the sizes for stock 03 cav 4dr?
2. Would it be possible to put 3ways in the back without an amp?
3. " "2ways in the front " "?
4. Is it possible to put a sub&box in the trunk without an amp?
5. What frequency does the stock stereo put out?

thats it for now, thanx for your help

1. front 4x6" rear 6x9 you can get a adapter plate or make one to fit 6.5 inch speakers for the front.
2.yes
3.yes
4.NO you need a amp
5. they put out allot of frequencies (maybe you mean spl or wattage)

you will need and amp if you want to feel and hear your bass but i had a 12 in a box hooked up to my rear speaker and it was working i could hear it but it was more of a enhancement to the sound spectrum then a difference. basically no amp low vol of bass amp more vol and power to the sub.