is it possible to have to much port area?

[bvr_j_0969 10+ year member]

just as the tittle says is it possible to have to much port area?

i was just wondering.

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[lincolntc690 10+ year member]

yep

 

[CRXBMPN 5,000+ posts]

yup

 

[AudioXtremes 10+ year member]

It would take a lot. It also depends on the specific enclosure style.

My van runs around 1700sq inches of port for 2 18"s. Burps at 58hz.

 

[01 S 10 10+ year member]

yes, whats the application? daily? SPL only? 30hz tuning? 60hz tuning?

 

[DBBOOM 10+ year member]

Yes

 

[snoopdan 5,000+ posts]

If you place your sub on a table and hook it to an amp, then you probably have too much port area //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[99grandprixGT 5,000+ posts]

yes.

 

[Rashaddd 5,000+ posts]

It would take a lot. It also depends on the specific enclosure style.
My van runs around 1700sq inches of port for 2 18"s. Burps at 58hz.

//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif for a regular ported box? Or is that like a bandpass port?

I try to get 75%+ of the driver's Sd in port area if possible, which most consider alot, I wouldn't go over 100% as I've never tried yet, but I intend to soon, so we'll see the results //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[AudioXtremes 10+ year member]

//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif for a regular ported box? Or is that like a bandpass port?
I try to get 75%+ of the driver's Sd in port area if possible, which most consider alot, I wouldn't go over 100% as I've never tried yet, but I intend to soon, so we'll see the results //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Yes its a bandpass. For a regular styled ported box 30sq inches per cf as about as high as I personally go. Not that this is a maximum.

 

[bvr_j_0969 10+ year member]

30 hz daily i was wanting to put about 200-250 on my wall i was building 4 re sr 15's.

11.1 cft netnet

 

[Rashaddd 5,000+ posts]

30 hz daily i was wanting to put about 200-250 on my wall i was building 4 re sr 15's.11.1 cft netnet

that's nowhere near too much, if you can do it, do it. its gonna move air like hell

 

[ThatChevyGuy 5,000+ posts]

I played around with this theory a couple summers ago. I had two pbx es-10d's and first built a 35 hz tuned box with 40 inches of port. I then did 50 inches, and the output increased. I then did 60 inches, the output increased more, but i noticed on the low notes around 30 hz, the drivers were over excurting with the same amp settings and i snapped the leads on one. So Pe does decrease i assume.

 

[Rashaddd 5,000+ posts]

I played around with this theory a couple summers ago. I had two pbx es-10d's and first built a 35 hz tuned box with 40 inches of port. I then did 50 inches, and the output increased. I then did 60 inches, the output increased more, but i noticed on the low notes around 30 hz, the drivers were over excurting with the same amp settings and i snapped the leads on one. So Pe does decrease i assume.

With the added port area you will lose dampening below tuning faster.

 

[Notloud00 10+ year member]

yep. the increased output is well worth it IMO.