15'' or 18''

if you have sufficient room for an 18" then it will be louder cause of the cone area being greater. It really depends on the room you have though.

 

what jonny said. if you have the room go for the 18 for sure, but the 15 can get loud too.

it boils down to your budget i guess.

 

there is no best. what do you want it for? competing or everyday pounding?

what can you fit in there? do you, or are you willing to give up your trunk for either sub?

 

take in account that, in a trunk car, you need airflow in there! You can maybe fit an 11 cube box in there and you could barely hear it. You need space for the waves and air to flow. Personally, in a trunk I would prolly suggest a 15 over an 18. just my opinion though. You should give us some dimensions on the space that you are willing to sacrifice.

 

the smaller you go, the more hit you will get.

the bigger you go the deeper bass you will get

I would go with 15's personally, given the choices at least.

 

what are your max dimensions in the 98 malibu?? they dont seem like big cars in the first place.

this is a myth, its all in box design.

 

he may be talking about a sealed box KVO. if you go a little larger on a sealed box's recommendation it will play lower, but i think power handling suffers.

 

your seats fold down right?

 

prolly the 2 12's i think the cone area is greater. get some AQ HDC3's and run em on a big amp. they will slam! make sure ure electrical will hold up though!

 

I've heard a lot of 15's and I like the bass better from a 15" compared to 12's... that's the reason why i bought my 15's..

now comparing 18's to 15's, i would prolly still stay with 15's cuz musically i don't think 18's are all that great but if your going for heart stopping pounding bass then 18's will do you good.

 

i havent heard a 15 that i like yet. granted i didnt like the installs either. i bet they do pound in the right setup

 

i went from 12s, to the 13w7, to 12s, and now i have this 15. all of them hit the notes about the same, no real difference between all of them. the only thing is the 15 gets really loud and kills the deep bass (maybe because the box is tuned to 32hz?? lol)

 

Kvo, i did notice that too. the 15's dig deeper... at least with the installs i've heard..

 

well my box is tuned to 31Hz and it dont dig deep enough for me so idk... Maybe i need 15's. im gonna try to get tuned to 28Hz. but anyways.... Since what they said, I would go 15's.