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View Full Version : TaylorFade's QW T-Line horn thingy...



TaylorFade
04-27-2010, 07:11 PM
So, I've been wanting to try a tline(qw) for a while because I am fascinated with efficiency and what not, and I bought these little eD 3.6's just to try different box designs with sooooo....

I don't know the resonant frequency of my car, but my current box kills at 37, 38ish so I decided to tune to there. It's higher than the 28hz Fs of these little subs, but it also makes the line little shorter and it's not far off from eD's recommended tuning of 35. I say it's a horn type thingy because the ports step up in size even though they're not tapered. Each port is tuned to 37hz and I had to play with the chamber volume to get the box's resonant frequency to 37 also. It's 6.9ft of line which puts the t-line tuning to 37ish too. Anyway, on to the pics....

All cut up and ready to get glued. This is my first screwless box.

http://farm4.static.flickr.com/3334/4558563037_0140181fcd.jpg

Coming together nicely.

http://farm4.static.flickr.com/3468/4558564453_09c9410e4a.jpg

45's in the corners and 3/4" roundover on all the port edges. I may have cut my terminal posts a little long. Lol.

http://farm4.static.flickr.com/3069/4558566037_deb19ec8b1.jpg
http://farm4.static.flickr.com/3367/4558565203_304f1dfaab.jpg

The ol' spare tire clamp trick. Yes, I'm from the South.

http://farm5.static.flickr.com/4008/4558563343_193643eedc.jpg

All buttoned up and ready for a listen. It's pretty short as you can see so I can still get my golf clubs in the trunk if I put them on top of the box. My original plan was for a double baffle but I got lazy. Hell, I didn't even let the glue dry before I put it in the car.

http://farm4.static.flickr.com/3615/4558563685_3a00387ed3.jpg


Drum roll, please..... The results.

http://farm4.static.flickr.com/3424/4558566083_428a598e17.jpg

That was at 40hz. It was high 136's at 37, 38hz but 40hz seemed to be the number. Not bad. Not bad at all for some little mini subs in my first shot at a quarter wave.

Thanks to Lance for the TL time.

KyleBechtold
04-27-2010, 07:15 PM
if you were killing at 37 before you shoulda tuned to 34hz this go around

TaylorFade
04-27-2010, 07:25 PM
if you were killing at 37 before you shoulda tuned to 34hz this go around

Why is that?

Oh, I forgot to mention that this is on a DD ss1a @ 1.3 ohm load, so they might be seeing 150-200w apiece.

KyleBechtold
04-27-2010, 07:26 PM
Why is that?

Oh, I forgot to mention that this is on a DD ss1a @ 1.3 ohm load, so they might be seeing 150-200w apiece.

because you peak about 3hz above tuning.. thats why you are peaking around 40 now..

Louisiana_CRX
04-27-2010, 08:34 PM
the box looks nice....

DB-Audio
04-28-2010, 04:28 PM
nice box always wanted to try building a t line

Jh8909
04-28-2010, 04:32 PM
title of this thread = win.

djm4rshm2llow
04-28-2010, 04:37 PM
looks gay as hell.

kidding, sweet ****, that thing takes up your whole trunk

Blasphemy
04-28-2010, 04:45 PM
:yumyum:

djm4rshm2llow
04-28-2010, 04:51 PM
http://i643.photobucket.com/albums/uu157/iamjk123/Untitled.jpg


Sneaky


how many sheets of mdf did u use?

O.G. D-Wet
04-28-2010, 04:56 PM
lol this is kool. this is the **** everyone thinks to do but then goes "nah, **** it..."

TaylorFade
04-28-2010, 06:49 PM
http://i643.photobucket.com/albums/uu157/iamjk123/Untitled.jpg


Sneaky


how many sheets of mdf did u use?

Arrrg! I knew somebody was gonna catch that. There are actually 6 screws in the whole box at points I couldn't clamp in two directions at the same time. I mean, you saw my "clamp" for the top, Lol. But compared to how many I usually have in my boxes, that thing is screwless.

It only took one sheet. But it took the entire sheet.

on1wheel01
04-28-2010, 07:06 PM
Nice man i've been wanting to do one of these but have no clue in designing one

modskwod
04-28-2010, 07:23 PM
Nice! I've always wanted to try making a t-line.
Btw, you should put "Quarter Wave T-Line Horn Thingy" on the box in fancy lettering.

Blasphemy
04-28-2010, 07:28 PM
Nice! I've always wanted to try making a t-line.
Btw, you should put "Quarter Wave T-Line Horn Thingy" on the box in fancy lettering.

:word:

TaylorFade
04-28-2010, 07:31 PM
Nice! I've always wanted to try making a t-line.
Btw, you should put "Quarter Wave T-Line Horn Thingy" on the box in fancy lettering.


Hahahaha. Toatally. "QWTLH thingy" All carved out in the top. Maybe in plexi with LED backlights. Lol.