Transmission Line Enclosure

[Aaron Clinton 2,372]

here is a link to some tables, but I would really love to build a TL or Snail Shell box soon to put a small sub in

http://www.quarter-wave.com/Theory/Alignment_Tables.pdf

[djjdnap 78]

ummmmmm,

i read thorugh it and it reminded me of my physics class.

So where does it tell you how to build it??

And he said he had an outline or something on his page, where is his page?

[Aaron Clinton 2,372]

I dont know, I am thinking about emailing him to ask some direct questions

[djjdnap 78]

I dont know, I am thinking about emailing him to ask some direct questions

Act first think later

[Nikuk 1]

here is a link to some tables, but I would really love to build a TL or Snail Shell box soon to put a small sub in

http://www.quarter-wave.com/Theory/Alignment_Tables.pdf

<{POST_SNAPBACK}>

Hey Denim, please let me know if you get any response from them. I shot an email to them about 4-5 weeks ago. Resent it once more. No response as yet.

I've been piqued by a folded horn formula for a lil while now.

[Aaron Clinton 2,372]

here is a link to some tables, but I would really love to build a TL or Snail Shell box soon to put a small sub in

http://www.quarter-wave.com/Theory/Alignment_Tables.pdf

Hey Denim, please let me know if you get any response from them. I shot an email to them about 4-5 weeks ago. Resent it once more. No response as yet.

I've been piqued by a folded horn formula for a lil while now.

nothing so far, I would really like to know, I want to try it soon,

[Mizah Mar 0]

ya got bbp6? i have somethings i can share with you that you could plot on there.

[Aaron Clinton 2,372]

ya got bbp6?  i have somethings i can share with you that you could plot on there.

I have bbp6, but I am not good at it yet, I have only messed with it a few times

[Mizah Mar 0]

in bbp6, model a large vented box w/huge, long port. make sure to enable vent resonance peaks in the graphs. then place an internal baffle that slants into the corner within the enclosure volume.

you will then have 2 chambers. model the chamber with the driver in it as the volume of a small vented box. the area of where the slant meets the corner should be the port area and measure down the center out towards the port exit for the port length. make sure to match the tuning of the two enclosures. so if the large vented box is tuned to 30 htz., tune the small chamber and slant distance to corner to 30 htz. as well.

when you put a slanted baffle in a box and do not extend the port, the box reacts like a double chambered bass reflex enclosure (DBR) with the internal port being the area from the slant to the corner and the port depth being the thickness of the enclosure material. the resonance of the exit port will resonate at the internal port, in this case being the slanted area. so what happens is that the box will see the compliance of the small vented box but will be tricked as if its a large DBR vented box because its tuned the same.

analyze the graphs. you'll notice that the box will have a lower, flatter impedence and limited excursion while having the frequency response of the larger enclosure.

[02BlackOnBlackSS 1]

My friend built a t-line box for a 6.5. He said basically, all you have to do is make the box 6.5x6.5 (or whatever the sub is) and make it 1/4 the length of whatever wave you want. He used the FS of the 6.5 which was 38 and it was 7 ft 11 inches long. He wrapped it in the middle and went back around.

Sounded like a really nice 8. He probably could have metered around 133-134 on the new TL. We will probably get it metered sometime in the future, but for now hes building another t-line for his other 6.5.