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Port Length Question..... ?


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Have always gone with #1 and read that it was the way to calculate port depth (measured from the center). With this port being 10.5" off the right wall and 10.5" off the back wall, I was curious which of these who would apply.

Might do a build on my wall in order to make it more tunable (easier to plug or shim the port for various tunings.)

17386502791_bf954e0105_o.jpg

so, #1 or #2?

29408240963_9908a51930_o.png
Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's]

BL :  http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/
YouTube: http://www.youtube.com/hitemwiththeflex/

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If the length of that port piece makes the distance from the end of it to the back of the enclosure equal too the port width then #1.

I could be wrong though because I'm no pro designer I've only ever built for myself but I'm pretty certain I'm right.

That being said a lot of people's definition of "music" is a clipped 30 hz sine wave with some 80 IQ knuckle head grunting about committing crimes and his genitals.

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If the length of that port piece makes the distance from the end of it to the back of the enclosure equal too the port width then #1.

I could be wrong though because I'm no pro designer I've only ever built for myself but I'm pretty certain I'm right.

that is what i always thought, basically trying to iron this out so i know my true airspace rather than a maybe.

29408240963_9908a51930_o.png
Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's]

BL :  http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/
YouTube: http://www.youtube.com/hitemwiththeflex/

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OK was just checking, that is what I had always thought but never really ran it by a bunch of people.

29408240963_9908a51930_o.png
Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's]

BL :  http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/
YouTube: http://www.youtube.com/hitemwiththeflex/

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If the port is only 10.5" wide, your second measurement is wrong. It would be 6". Half the port width plus the .75" of the port wall.

ohh i see what you mean, thanks.

29408240963_9908a51930_o.png
Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's]

BL :  http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/
YouTube: http://www.youtube.com/hitemwiththeflex/

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planning a possible rebuild for the wall.....

Port is large for a reason, huge port area for burps, plug for daily.

This would be 39hz tuning with 23 per cube, and could plug it to say 33/34hz w/ 16 per cube, or even 30hz w/ 13 per cube.

That is why the large ass port, many options for testing and tuning. With my current box, it does well with 35-55 (which is nice), but I really really miss smashing 27-35. I can hurt people a good amount from 35-50, and good choke at 44-50, but for enjoying a system like this daily, i wish i could play lower.

17179975687_ce2f7c41b3_o.jpg

29408240963_9908a51930_o.png
Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's]

BL :  http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/
YouTube: http://www.youtube.com/hitemwiththeflex/

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