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View Full Version : port displacement -- help !!!



Got Mudd ?
06-22-2005, 09:41 PM
I guess I am tooo dumb , could someone please help /

I have a 10 inch sub , specs say for ported at 33 hz it needs to be in a .75 cubic foot box with (2) 2" ports that are 20 inches long . sub displacement is .093

could someone please tell me what the port displacement would be ? and would i have any trouble with port noise or should i go with one 4" port ???

psych0ticnemes1
06-24-2005, 11:31 AM
<-- not good with round ports, sorry

tRiGgEr
06-24-2005, 11:35 AM
Port displacment 0.15ft^3.

And 12.56 square inches of port area should be enough for a 10" Hx2. If you go with a 4" it will have the same port area.

I had a 12" and had 24" of port area. Sounded great with no port noise.

bcarpenterfhl
06-24-2005, 04:57 PM
If you go with a 4" it will have the same port area.



*sigh* 2 2" ports do not yield the same port area as a single 4" port.

tRiGgEr
06-24-2005, 05:03 PM
*sigh* 2 2" ports do not yield the same port area as a single 4" port.

Whoops. I forgot to multiply 1x1x3.14 lol.

I was using 2x3.14.

So two 2" ports have 6.28 and the 4" port will have 12.56.

Thanks bcarpenter.

Even though you were being an *** about it *sigh*;)

bcarpenterfhl
06-24-2005, 05:05 PM
Even though you were being an *** about it *sigh*;)

i was just giving you **** man. all is good.

tRiGgEr
06-24-2005, 05:07 PM
i was just giving you **** man. all is good.

Die now :evil:

Got Mudd ?
06-24-2005, 06:27 PM
so two 2" vents at 20 inches long = 6.28 cubic inches ??

bcarpenterfhl
06-24-2005, 07:37 PM
so two 2" vents at 20 inches long = 6.28 cubic inches ??

yes. but thats an incredibly small port for almost any sub.