[acuradriva]

im not asking for help, i am asking if two different size subs would sound good or bad. i am asking information from someone with expierience who has had two different size subs in their car or has heard something like that

well he answered your question.
If you relally want 2 different size subs and want it to sound good with no cancellation you would have to get crossovers so you can have the 15's for like 20-45 hz and the 12's for 46-80Hz