View Full Version : question

09-09-2011, 03:57 AM
do you think you can fit 2 sa 8s in 1.86 cubes for box. If so it will prob be with an aero port can you have then do like a 45 or 90 degree bend since it is in a 86 firebird not alot of room to work with.

Team TH (Donny)
09-09-2011, 04:46 AM
Yes, you will be ok with 1.86 cu ft heck just have half the aero port in box half out to give for the back hatch. It really depends what you are going for? SQ/SPL both. You have an advantage with the hatch..

Here is what I built in my old firebird intended for looks at the time. Two 12's in a sealed box at .8 cu ft per chamber with ~600 Wrms. The SQ was great! Even hit a 138.8 db at 44 Hz.. You can be surprised, especially with aero ports.

http://img20.imageshack.us/img20/1844/dbdrive004.jpg (http://imageshack.us/photo/my-images/20/dbdrive004.jpg/)

09-09-2011, 04:48 AM
he wants some spl but not to be ****** spl

Team TH (Donny)
09-09-2011, 04:53 AM
So are you going for numbers in competition? Or just want it to be SQ while getting pretty loud?

09-09-2011, 04:56 AM
he just wants dailey driver.

Team TH (Donny)
09-09-2011, 04:59 AM
Then yes. You will be ok with the airspace and aero port idea.

09-09-2011, 05:00 AM
how big of aero port do u think he wants for like 35hz tune

Team TH (Donny)
09-09-2011, 05:09 AM
Do you know sub displacement on those?

Team TH (Donny)
09-09-2011, 05:13 AM
Never mind.. I found it to be .14 cu ft each.

Team TH (Donny)
09-09-2011, 05:16 AM
Ok, how big you want the diameter of the aero port? For a 2" diameter aero port I get 3.91" in length.

09-09-2011, 05:22 AM
that woud be perfect
unless how big would a 3 inch diameter be

Team TH (Donny)
09-09-2011, 05:28 AM
8.65 in length. By the way for these I didn't calculate considering any displacement of the ports so don't have it inside the box halfway or what not just flush with the internal side of the MDF sticking out.. Make sense?

09-09-2011, 05:30 AM
yeah it does thnx for your help.

Team TH (Donny)
09-09-2011, 05:38 AM
Not a problem. Just ask if you need help with anything else..