View Full Version : aero port question
if i do a CRX box with ports on the out side, how would i tune it.
would the caculator at subwoofer tools.com work right for that program.
05-06-2007, 10:33 PM
On the outside of the box, I believe the ports will not add any volume, so whatever volume you have not including the space of the port, use that to calculate the length of the port, if it is too big cut it down some.
05-06-2007, 11:05 PM
It would be tuned just like any other enclosure. However, there is no port displacement.
my problem is that i use this program to tune
and it is for enclosure with inside port displacement.
so i need to figure out how to tune without port displacement.
05-07-2007, 12:44 PM
that calculator does not account for port displacement.
use the precision port calculator:http://www.psp-inc.com/ to get the length and don't worry about adjusting the box's volume.
05-07-2007, 02:33 PM
thats based on ttb's flared port formula's.
05-07-2007, 04:57 PM
i use the psp-inc calculator
05-07-2007, 05:05 PM
i suggest the ttb one unless your using psp's ports.
It takes the flair radius compared to tube diameter in account when calculating the effective vs total length.
thanx everyone that helped
05-10-2007, 07:43 PM
ok for mine i got: 2.55 ft3
port diameter: 6
# of ports: 2
straight length port: 44.40
flare length port: 45.40
so how would i come up with how long each port needs to be and that stuff?
05-10-2007, 09:10 PM
"straight length port: 44.40"
05-10-2007, 09:12 PM
for each or like both of them, and also would it be better to go with 3 instead of 2 ports?
05-11-2007, 08:19 AM
divide your box volume by the number of ports your going to use. cut each to that length.
no that would tune in the 30's
it's 55 Hz or nothing.