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View Full Version : Help with slot port.

Cahm Rohn
06-29-2006, 05:03 PM
I want to build a box for my 2 mtx 9512-44's. The plan is to go 6.89cuft. @32 hz port length of 24.74. So how long would I have to make the walls. Box is L38 W24 H16

Cahm Rohn
06-29-2006, 06:01 PM
bump anyone

Cahm Rohn
06-30-2006, 08:52 AM
Breakfast bump

wesl56
06-30-2006, 09:01 AM
why are you set on that length? you should decide on a port area first, then calculate the port length

Cahm Rohn
06-30-2006, 09:11 AM
Only set on 32hz that is the tength the calculator gave me

hzsogood
06-30-2006, 09:22 AM
14.5x3 " port @ 32 hz is only a 10" long port :eyebrow:

hzsogood
06-30-2006, 09:24 AM
I want to build a box for my 2 mtx 9512-44's. The plan is to go 6.89cuft. @32 hz port length of 24.74. So how long would I have to make the walls. Box is L38 W24 H16

The tuning i got for the length you have w/ a 14.5x3" port area is around 24 hz

Cahm Rohn
06-30-2006, 09:27 AM
Sorry port area is 6.5x14.5

hzsogood
06-30-2006, 09:31 AM
I want to build a box for my 2 mtx 9512-44's. The plan is to go 6.89cuft. @32 hz port length of 24.74. So how long would I have to make the walls. Box is L38 W24 H16

Well u have ur answer now... Make the port 24 3/4 long.... At 6.5 inches wide... :eyebrow: Not sure what ur asking

hzsogood
06-30-2006, 09:33 AM
Sorry port area is 6.5x14.5

Too much port area imo... almost 100^in for those 12s

Cahm Rohn
06-30-2006, 09:38 AM
Ok I used georges tutorial and it f*%\$#@ me all up, so how would I find out what the actual length of the walls would have to be.

hzsogood
06-30-2006, 09:45 AM
Ok I used georges tutorial and it f*%\$#@ me all up, so how would I find out what the actual length of the walls would have to be.

what walls ??? port walls?? Its 23 3/4 in long..... You make a bend 6.5 inches from the back wall of the box and then make the port the rest of the length along the back wall...

hzsogood
06-30-2006, 09:47 AM
your port will be 16inches down the depth side(24 in ) and 8 " down the back off the wall .. L shape

Cahm Rohn
06-30-2006, 12:45 PM
Thanx thats almost what I was coming up with I guess I was trying to make it harder than what it was.

Cahm Rohn
06-30-2006, 01:06 PM
The min. usable port area was like 84 sq in., would going up about 10 affect it that much?

hzsogood
06-30-2006, 01:09 PM
The min. usable port area was like 84 sq in., would going up about 10 affect it that much?

no, i like more port area, i just thought thatwas a lil much , u should be good tho, post pics when u can

Cahm Rohn
06-30-2006, 02:17 PM
Im more worried about the vids, these subs get stupid loud and their only in about 3cubes ported prefab (cough cough), but the vfl help them turn my car to jello.:)