New to box design. Help.

[mulisharider10]

i want to install a costom fit box into my hatchback. Its a sealed box and ive alread built it. What i need to know is how big to cut the holes for the subs.They are 12" power acoustic subs. If u could help me the would be awsome.

ps:the reason i cant just us the ring inside the box is because that ring is part of the box and the box is wood.

[mgaidica]

well ide check the site, but most likely its sometihng like 11 1/8", u could just cut 11" to be safe, then try, and use a jig saw to widen it out of needed. but for sure check the site or call them, then u can be sure.