Hello
I was wondering whether it would be possible to build a dual tl design.
I want to place 2 subs in the same tl design enclosure, in order to safe space and costs (yes, i know wood isn't that expensive, but i'm just cheap).
I went online and searched for hours, but i couldn't find anyone who had the same idea. But my dilemma is this: If i place 2 subs in the same tl, would the mouth then have to be the size of the area of both subs together, or would it have to the same size as if i was just using 1 sub?
Keep in mind that i'm not looking to make it tapered, nor push-push or push-pull. I want to mount both subs on the front baffle, right next to each other. This might not be be very efficient, which is why i would love to get some input as an newbie in the audio world.
- Sebastian A. (from Denmark)
I was wondering whether it would be possible to build a dual tl design.
I want to place 2 subs in the same tl design enclosure, in order to safe space and costs (yes, i know wood isn't that expensive, but i'm just cheap).
I went online and searched for hours, but i couldn't find anyone who had the same idea. But my dilemma is this: If i place 2 subs in the same tl, would the mouth then have to be the size of the area of both subs together, or would it have to the same size as if i was just using 1 sub?
Keep in mind that i'm not looking to make it tapered, nor push-push or push-pull. I want to mount both subs on the front baffle, right next to each other. This might not be be very efficient, which is why i would love to get some input as an newbie in the audio world.
- Sebastian A. (from Denmark)
The only thing you can do is to glue the 2 subs together.
This can save some space, if you use the subs as table or under a sofa.
Remember, if you change volume, surface area etc, things will sound different and very often a lot worse. Stay with a proven design and stick with it.
This can save some space, if you use the subs as table or under a sofa.
Remember, if you change volume, surface area etc, things will sound different and very often a lot worse. Stay with a proven design and stick with it.
Okay thanks for the tip, i was just curious since i've seen people mess around with 4th order and isobaric tl designs which made me wonder if this was possible, but i'm gonna make 2 separate boxes then.
two subs in the same line isn't a problem, you just need twice the volume. if you have a design for one already figured and folded, it gets wider. a tapered line just makes practical sense... if memory serves, you are able to reach a lower tune with less pipe length, which for bass frequencies is going to be desirable.
I used to offer generic TLs for car trunks fitted for dual 10s or dual 12s, 30" wide and 36" wide to fit between wheel wells. every time I got someone with high Q drivers id toss them one of those, they just thought they were BR boxes.
I used to offer generic TLs for car trunks fitted for dual 10s or dual 12s, 30" wide and 36" wide to fit between wheel wells. every time I got someone with high Q drivers id toss them one of those, they just thought they were BR boxes.
What problem are you trying to solve?
The best design with two drivers would be two different models of drivers in two different kinds of boxes in two different locations. You can climb down that "ladder" of quality to any point you want.
(After 55 years, I'm still not sure if mixing the L and R subwoofer signals is beneficial except for vinyl source)
B.
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To be honest, you dont have to widen the line and take advantage of placing on sub at terminus and go to hornresp and sim other sub at such a place where dip and peak intersect at each other and smoothen the pipe generated resonance out so you get smooth response... As smaller crosssectional tline will also act as lowpass at its own output.
Now the only issue you have is high Tline air velocity but i think you guys wont be going too loud with non damped or low damped Tline since they are too sensitive already..
Air velocity can be then tuned by expanding the crossection area of Tline, but there js no need for twice the sub = twice the cross-section
Now the only issue you have is high Tline air velocity but i think you guys wont be going too loud with non damped or low damped Tline since they are too sensitive already..
Air velocity can be then tuned by expanding the crossection area of Tline, but there js no need for twice the sub = twice the cross-section
https://www.t-linespeakers.org/classics/coffin/index.html
Only a thot experiment at the moment but it could be finished if any interest.
http://wodendesign.com/downloads/Woden-2xA12pw-MLTL-Twin.pdf
dave
Only a thot experiment at the moment but it could be finished if any interest.
http://wodendesign.com/downloads/Woden-2xA12pw-MLTL-Twin.pdf
dave
What software do you use to draw box plans? i was thinking i might move on from graph paper....
the thot experiment looks hot ma friend
my best suggestion to sim two sub tline
open two instances of horn resp
add same driver value
but on on end of tube and on other instance having it OD on somewhere on tube
and see raw response on both(don't add dampening like rock wool)
if you see one driver dipping at 200Hz and one peaking at 200Hz(i know, you got it) , technically. getting decombing effect
you can effectively put on more subwoofer inside Tline and also fix Tline cons like tube resonance (natural science phenomenon, blow in tube and you get multiple of harmonics peaking)
I will sim one once i have some money to buy good old Dayton ultimax 10 x 4
i want isobaric x 2 (series parallel) in Tline and want to see what happens when we have quad high excursion subwoofer, how low can we go
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works good it just sucks that you have to have such a small cross-sectional area for your ‘port’… (tl path) You end up with alotta wind speed. Really wish there were more ways to get around it because it’s kind of fun. During Covid I got so cabin fever, I built this enclosure out of scrap wood and OSB shelving i stole from the shed🤪🤷🏻 Goofy but I didn’t care at least I was keeping busy… like you said it ends up having a lot of low end grunt as compared to the SD or two SD versions. You got MMS and motor force and you gave up SD.. I ignore all of that and consider it a brand new set of TS parameters to work with…
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Things like the B@se wave cannon Can be made much better if they just pulled it up and stuck together Siamesed with respect to the odd harmonic intervals
Perfectly doable.
sim in hornresp and build of this “undersofasub” correlated perfectly.
sim in hornresp and build of this “undersofasub” correlated perfectly.
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This is lovely! Ever think of why a taper or flare is a big compromise to potential? (Cosine and sine wave)
Not necessarily to the fundamental or the end result, but along the way, what got missed potentially/left out so to speak?
Not a very good explanation but I don’t think it really is one unfortunately. Reflection, mirror.
We have been over this elsewhere, I trust in the math from people like David (hornresp), Martin Kings spreadsheets and so on. I know I will probably never ever learn the underlying math since I’ve seen it in Bjørn Kolbreks book and I don’t have to. It’s all physics and math, no hidden truths in the stars.
I simply liked to try a single folded tapered transmission line loaded at the end from a Swedish university paper and since the box includes a dsp/amp I wasn’t too worried about the outcome, it was later tuned to the room.
A friend needed a sub.. simple as that.
I simply liked to try a single folded tapered transmission line loaded at the end from a Swedish university paper and since the box includes a dsp/amp I wasn’t too worried about the outcome, it was later tuned to the room.
A friend needed a sub.. simple as that.
