BTL BOX HELP

[mysticstylezaudio 0]

2 BTL 12's. The outside dims of the box are 17" tall x 24.75" deep x 33.5 wide. I am going to use a 8"pvc pipe and make my own flares but need help on length for 33htz tuning. Also with it being an 8 inch pipe do I have to have 8 inches from the back of the box to the end of the pipe? Also how long should the pipe be to be 33htz? Please help me with this.

[RobClay 20]

12.80" for a 33Hz tune.

[mysticstylezaudio 0]

Are you 100% sure on that length? I just want to make sure before build cause I don't want to have to try to get it back out

[BKOLFO4 29]

12.80" did not take into account the driver and port displacement.

I come up with 15.6" for a port with no flare. You could add an inch or so for your flare end correction.

That will be 5.8 ft^3 net volume @ 33 Hz.

With 3/4" wood:

15.5 x 23.25 x 32 = 6.67 ft^3 - (2 x .18) = 6.31 ft^3 - (15 x 4.25^2 x pi) = 5.8 ft^3 net

You could also make the driver mounting baffle 1.5" thick. Add another .75" to the port if you decide to double the baffle.

Brian

[RobClay 20]

Yep, forgot to take that into account.

Bad mistake on my part.

[mysticstylezaudio 0]

Ok. Thanks guys that helps alot