Le14 port tube length help

[bldozier]

Hello,
my enclosure volume is 2.8L, im using an le14a
can someone recomend a port length
I have a 3 5/16 × 48 port

im going to finish a box in the next week or 2,
as 3/4 bb is over sold atm, and I only have enough for 1 cabinet,
Thanks mr w, for the templates ☺

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[Woody Banks]

Is your enclosure volume really 2.8L or 2.8 cubic feet? A 2.8 cubic foot cabinet will need a port tube(inside diameter) 3.3125" x 4.74". If your inside diameter is 3" the length is 3.68". I hope this helps.

Woody



Hello,
my enclosure volume is 2.8L, im using an le14a
can someone recomend a port length
I have a 3 5/16 × 48 port

im going to finish a box in the next week or 2,
as 3/4 bb is over sold atm, and I only have enough for 1 cabinet,
Thanks mr w, for the templates ☺

75252
75253

[bldozier]

Sorry

91liter or 3.2cuft

[bldozier]

Thanks mr woody, (2) @ 2x7 1/8.
Could I use one port on the baffle one port on the back of the cabinet

[bldozier]

http://www.audioheritage.org/vbulletin/showthread.php?7778-JBL-LE14A-In-L-100T-Cabinet

I was reading the thread here, he mentions something like a 4x8
is this 1 or 2 ports if anyone knows

[bldozier]

Yup I read that on the L100t,

I was mentioning the zilch comment on the citation 7.4.

[hjames]

Yup I read that on the L100t,

I was mentioning the zilch comment on the citation 7.4.

Oh - Hard to tell what part of the comment you were referring to when you don't give specifics ...


Apparently: Harman Kardon Citation 7.4 Passive Home Theater THX Cert Subwoofer

So, I googled Citation 7.4 and found there are pictures of the Citation 7.4 when you scroll down in this old thread on AK ...

Anyway, looks like a single port in those sub boxes using the le14h-1 woofer.

http://audiokarma.org/forums/index.php?threads/hk-citation-7-4-jbl-woofers.470273/

But I did a copy paste to save you going there ...
(pay no attention to the khorns)

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[bldozier]

Hmmm, just double, checking that heather, thanks for the reply, confirmation and link.

mr woody's suggestions is 2 ports if using 3" id tubing... I wonder the frequency. as the threads mentioned 30hz with the 4x8.

Anyone care to offer a second suggestion, could I run if needed the second port around the backs of the cabinets?
Is the smaller id port the reason for the second port?

Thanks.


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[Woody Banks]

Using the Bass Box program with a tuning of 29Hz the result is one port 3" x 4.48".



Hmmm, just double, checking that heather, thanks for the reply, confirmation and link.

mr woody's suggestions is 2 ports if using 3" id tubing... I wonder the frequency. as the threads mentioned 30hz with the 4x8.

Anyone care to offer a second suggestion, could I run if needed the second port around the backs of the cabinets?
Is the smaller id port the reason for the second port?

Thanks.


75258