To port or not to port...

[agarabaghi 10+ year member]

So i finished my box, but the port had not arrived yet so i left it sealed. Im running an SA10 on ~1000watts from an Audiopipe APSM1300.

Im very impressed with how it sounds. I had a similar box in the same setup for an SXX, but I believe the box was too small for the SXX. The SXX sounded great also, but the SA10 seems to be tighter and punchier, not sure which is louder.

The box looks like this, and you can see where the aero port would go.

The interior volume of the box is: 1.39 ft^3 before displacement of the sub...

This would yield approx: ~1.27ft^3 after speaker displacement.

Im not sure how much displacement a 17" long 4" wide aero port will displace, but according to the calculator on psp-inc

17" long flared port would give me about 37.5hz tuning.

Is that tuned a little too high? Should i just keep it in the sealed box?

Click to read more...

 

[Dr. Slam 10+ year member]

If you like how it sounds why not leave it as it is? It isn't gonna stay as tight and punchy once you go ported

 

[agarabaghi 10+ year member]

Am i risking any damage to the speaker in such a big sealed box? I think the recommended sealed size is like .7 ft^3

 

[Dr. Slam 10+ year member]

I doubt you'll damage that sub. You should be ok

 

[pro-rabbit 5,000+ posts]

That enclosure is to large to go sealed. If you want adjust sound do it with the port. Make it longer to lower tuning and see where that takes you.

 

[agarabaghi 10+ year member]

SO i will potentially damage the sub? It seems to be playing fine, and it not over extending it's self at all.

Where do i get longer ports? I would need something like 20" flared port to get it around 35hz. Can i get a longer middle section?

 

[pro-rabbit 5,000+ posts]

SO i will potentially damage the sub? It seems to be playing fine, and it not over extending it's self at all.
Where do i get longer ports? I would need something like 20" flared port to get it around 35hz. Can i get a longer middle section?

Yea, if you look around you can find 6ft long sections that you can cut down.

 

[agarabaghi 10+ year member]

and hint as to where?

Oh, check our your box plans modifited... I put basically a \_/ top and front to get closer to the sides and then ill carpet.

 

[pro-rabbit 5,000+ posts]

Looks much better. Sorry I didn't get back to your PM the other day. I was out of town for a bit and as always I get far to many PMs lol.

As for the port, let me see if I can track them down for you.

 

[agarabaghi 10+ year member]

No worries. It confused me for a while, but this time i built the box with the boat next to us so we could do some test fits. Let me know if you find any ...

 

[chapdawg1971 10+ year member]

Look up Derrick824, he makes them and they are nice. He's on another forum.

 

[agarabaghi 10+ year member]

what forums/ is derrick824 his user name here?

 

[agarabaghi 10+ year member]

I went with 3" x 15" aero port, which puts my tuning a hair over 30hz. Holy crap is it louder. It his some of the notes that the sa10 in the small sealed box can't duplicate.

Songs like Put On make everything from my chest to my boat tower rattle. Very please with the results!