Slot ported box help


Bronze Member
Username: Secretsoundz

St. Paul, Mn USA

Post Number: 40
Registered: Aug-05
I'm planning on building a dual slot ported box,
and have a few questions here...

1. How close is too close for the end of the port to be to the back wall?

2. Should I subtract inner port area from box space to find volume?

3. Whats the best way to find my sub's displacement?

3. Anyone have a goodcutaway view of a proper slot port box and/or really good slot port box webpage?


Silver Member
Username: Tjmutlow

Post Number: 151
Registered: Sep-05
i tell you what it all depends on subs, and yopu can find a premade slot ported for almost as cheap as what it will cost to make it. Trial and error can become costly.

Bronze Member
Username: Crazydude

Post Number: 55
Registered: Nov-05 has a goodcutaway view of what a slot port box should look like. but don't go according to their specs for your sub cause those specs are for re subs.

Silver Member
Username: Bestmankind

Los Angeles, CA USA

Post Number: 478
Registered: Oct-05
here is a picture of mine but its not done yet.


Silver Member
Username: Theelfkeeper

Stockbridge, GA USA

Post Number: 526
Registered: Feb-05
1. usually slot ports are 1 inch wide or wider and you want to keep the slot on the side the same width on the back.

2. basic geometry, brake it down to sections, be careful and don't overlap the corner and remember wood thickness.

3. should be avaliable on the spec sheet

4. see chad's post

Silver Member
Username: Solacedagony

New Jersey US

Post Number: 622
Registered: Oct-04
Chad or Brandon, do you have any websites that have details on the math/formulas to figure out how much port area you need, tuning, etc? I know there are "calculators" on the net, but I would like the actual formulas and I haven't been able to find them anywhere on the net.
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