LEARNING TO PORT

 

New member
Username: Wolfofoz

CHANDLER, AZ US

Post Number: 1
Registered: May-04
I've built sealed boxes before but this is my first ported box. I'm having trouble finding out how to figure port size and depth. If somebody could help me out I would be greatfull.This is what i've got
Pyramid PW10290
500 watt rms
10 inch
4 ohm
2 inch voice coil
fs 35.8
qms4.83
qes 0.59
qts 0.53
spl 85.6
vas 1.091

If I was to build 1.091 cube what portint is needed?
 

Anonymous
 
im sure jay amaro would sell you somthing!!!!
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 2954
Registered: Dec-03
www.the12volt.com has a port length calculator.
for a 10" sub you can use 3" diameter port tubing
 

New member
Username: Wolfofoz

CHANDLER, AZ US

Post Number: 2
Registered: May-04
Thanks I looked at that site. It seems a 3" port 40.87" long(not possible due to the fact the box is not that long) or 2" port 9.5" long is what it's calling for.I heard someone say that it's not good to use smaller the a 3" port. Any thoughts on 2" vs 3".
 

Silver Member
Username: Vipersbyms

Post Number: 139
Registered: Apr-04
im not sure what you put in for the tuning frequency, but it shouldnt be 40.87" long. tuned to 30hz, it would be like a 17" long port.
 

New member
Username: Wolfofoz

CHANDLER, AZ US

Post Number: 3
Registered: May-04
Ok. at 30hz, it's 16.65" but that is still a little tight. Any other idea's.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 2972
Registered: Dec-03
yeah
change the box dimansions.
that or put a bend in the port.
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