PDA

View Full Version : port equation???



sleazebagger
06-05-2011, 04:40 PM
Trying to figure out what the final length to cut this port.

thanks much

2.3ft^3 in each chamber tuned to 33hz, 4 " areo port

http://i30.photobucket.com/albums/c330/simeonstala/2011-06-05153606.jpg

Buck
06-05-2011, 04:42 PM
I need:

Vb
Fb
Port diameter

sleazebagger
06-05-2011, 04:43 PM
I need:

Vb
Fb
Port diameter

33hz

4" port

2.3ft. ^3

Buck
06-05-2011, 04:55 PM
With flares 11.33, without flares 10.33, round to your liking.

sleazebagger
06-05-2011, 09:00 PM
so i have another issue maybe someone can help me with...

the install sheet says the port needs to be one diameter( 4" ) from any walls and this...

http://i30.photobucket.com/albums/c330/simeonstala/2011-06-05193907.jpg

Buck
06-05-2011, 09:58 PM
They mean the opening of the port. The way you are showing it is fine.

Say like the port is 4" diameter. The port needs to be at least 4" away from the interior wall where the opening of the port is.

SpeedEuphoria
06-05-2011, 10:15 PM
if your not accounting for sub or the actual port displacement volume inside the box, your tuning will be higher