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determining best port size


joshuaV

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Posted

Hello,

I have 2 15" Pyle PLPW15D in a box that has 12 Cubic FT after displacement and bracing. I currently have 2 sets of AERO PORTS that I have made to try and found that the bigger sized ones are louder.

Aero Port set 1: (2) 8" diameter and 20" long

Aero Port Set 2: (2) 4" Diameter and 12" long

 

 

 

 

Can someone please help me to try to find the best port diameter/length to use these to the best to be tuned to about 30 Hz?

 

 

 

If it helps at all, i have attached the specs on this driver to the thread.

PLPW15D_Spec_Sheet.pdf

Posted

Determining optimal port area is all about managing air velocity through the port.  Lower velocity is better, but larger area ports have to be longer to keep tuning the same.  The trick is finding a balance between keeping port velocities low and keeping the port a size that will fit in the space you have to work with.

 

Port velocity is a function of box volume, tuning frequency, input power, and port area.  What amp are you running and what frequency do you want to tune to?

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Posted

What kind of power are you going to run? That box is huge. The recommended volume is 2 cubic feet each. I ran 4 of them in my truck sealed a few years ago. Now they are part of my DJ setup.

91 C350 Centurion conversion ( Four Door One Ton Bronco)

250A Alternator (Second Alternator Coming Soon)

G65 AGM Up Front  / Two G31 AGM in Back

Pioneer 80PRS

CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage

CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill

FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon)

Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)

Posted

I couldn't get your link to work. This is what I have on it.

WIN_20170416_220156.JPG

WIN_20170416_220207.JPG

91 C350 Centurion conversion ( Four Door One Ton Bronco)

250A Alternator (Second Alternator Coming Soon)

G65 AGM Up Front  / Two G31 AGM in Back

Pioneer 80PRS

CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage

CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill

FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon)

Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)

Posted

Based on the parameters posted each driver will work on a single 6" port (as they suggest), two drivers, two ports, very small xmax.

Posted
16 minutes ago, joshuaV said:

I have a 2000 watt amp for them. and trying to get them tuned to 30 hz

What make a model is your amp?  Not all "2000 wattt" amps are the same. 

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Posted

The sub is more of a woofer than a subwoofer. With the single cloth spider, I wouldn't expect them to have a long life with 12 cubic feet.

91 C350 Centurion conversion ( Four Door One Ton Bronco)

250A Alternator (Second Alternator Coming Soon)

G65 AGM Up Front  / Two G31 AGM in Back

Pioneer 80PRS

CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage

CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill

FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon)

Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)

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