im looking to put a sub box enclosure into the trunk of a g35 coupe,
the dimensions are:
15.8 x 31.1 x 13.1 inches for the 2x10"
16.4 x 33.9 x 15.1 inches for the 2x12"
this is the link to the enclosure

Im pretty sure the 2x12" box doesn't fit, is there any way to fit 2 12inch subs in the trunk?

 

I'm pretty sure you can fit a 12 inch sub on each side of your trunk if you find a 4080 type box. These are nice because you can still drop your back seats when you need the space.
http://www.myg37.com/forums/audio-vi...enclosure.html

 

Are there any being sold that are 12" for the G35 coupe?? and I was thinking maybe I could have one 12" on the side and one in the middle right here

you think this would work out okay?

 

They are around. Check the marketplace for a used one. I bought both of mine, Driv side and passenger side at the marketplace and I love them. Mine are for 10 inch subs but I imagine it would be easy to cut a bigger hole.

 

Generally, sealing the trunk off from the cabin like that isn't a great way to get good sound in the cabin. If your goal is to rattle the trunk, or if you want to play with the trunk open entertaining people in a parking lot, it'll do the job.

With having a pair of subs firing towards each other in an enclosed space (without proper signal delay/processing), you're going to have them fighting each other, making poorer quality sound than a single in either position would be. If you can get enough processing in there to have them work together, you're still sealed off from the cabin, putting all that SPL into the trunk lid.

Check out a setup like this: https://g35driver.com/forums/audio-v...ml#post1224216 for better inspiration.