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View Full Version : Look good? 12" BL (2.0 cuft - 35hz_



mobileaudio219
03-17-2009, 01:47 AM
Will somebody double check my figures here. It should be around 2.0 cuft tuned to 35hz (L PORT)

14.00" h
14.50" D
35.00" W

Total inside volume BEFORE sub & port displacement = 3.15 cuft

Port dimensions = 3" X 12.5" x 36 (L PORT)

Port volume = 0.95 cuft

Sub displacemnt = 0.15

0.95 + 0.15 = 1.1 cuft.

2.0 + 1.1 cuft = 3.1 (within .05 is close enough)

Thanks fella's.

thegreatestpenn
03-17-2009, 01:50 AM
you forgot about bracing displacement. also your port is on the small side for an spl woofer. double-baffle is recommended if you're not putting the sub right next to the side wall IMO. And i dunno if the box is deep enough considering how long the port is if the sub isn't all the way against the side wall

schackel
03-17-2009, 01:59 AM
go to reaudio.com and just design it there!

mobileaudio219
03-17-2009, 02:09 AM
It'll have an L shaped port, it'll fit in there fine.:)

FI recommends between "12-16 square inches of vent area per cubic foot of volume", 16 x 2 = 32. I should be at 37.5, so that should be good.

You're probably right about the double baffle, probably go ahead and do that. As for bracing, the L port runs along the back wall so there isnt really any big opened unbraced area's... I was think it would be alright?

mobileaudio219
03-17-2009, 02:10 AM
go to reaudio.com and just design it there!

I heard that caculator isnt very accurate. I used winISD, so I'm pretty sure it should be correct. I just wanted some opinions.

WildSebring
03-17-2009, 02:17 AM
I heard that caculator isnt very accurate. I used winISD, so I'm pretty sure it should be correct. I just wanted some opinions.

You heard right, that RE calculator *****.... :)

mobileaudio219
03-17-2009, 02:41 AM
You heard right, that RE calculator *****.... :)

What is everyones thought on winISD? Close?

I'm pretty sure my design is right on (or real close), but I'm designing it for somebody else so I want it be perfect (or near perfect.)

I've build a few enclosures now using winISD and all came out really well, so I think think its atleast fairly accurate.