I've always wanted good sounding portable speakers and thus this idea came up yesterday 😀. I made it using some leftover wood I had. The driver is ~3" and off an old hp pc. It works surprisingly well though! The line is tuned to 80 hz but bumps down to about 60 hz. Still needs an amplifier, preferably battery powered. Any suggestions?
Sorry for the poor pics..
😎
Sorry for the poor pics..
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
😎
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It sounds amazingly good. Sounds much bigger than it looks. Wayy better than my previous mini speaker. Though, it definitly needs the tweeter, which i have not wired yet 🙂
pc speaker huh? damn. I never thought that they could be worth the effort. How did you decide on how many reflectors to use?
Classic TL design receipe?
What you have looks to be the subset of TLs (used in its broadest sense), called Labyrinths.
dave
More pics here 🙂
front
next to my old portables
size
Since these pics, I have connected the tweeter, so do does it still count as fullrange? 🙄
And I'm looking an amp to go with it. How many watts should i go for to get decent volume?
Cheers!
front
An externally hosted image should be here but it was not working when we last tested it.
next to my old portables
An externally hosted image should be here but it was not working when we last tested it.
size
An externally hosted image should be here but it was not working when we last tested it.
Since these pics, I have connected the tweeter, so do does it still count as fullrange? 🙄
And I'm looking an amp to go with it. How many watts should i go for to get decent volume?
Cheers!
Why is the 3" facing the the inside of the speaker? My guess is that the t-line, or the acoustic labyrinth as Dave pointed out, will act like an effective low pass filter that eliminates most of the 3" bandwidth.
Regards Håkan
Regards Håkan
Actually Håkan what the labyrinth is going to do is suck up the entire back wave... it is to long and restrictive to get any bass support.
Midrange should improve dramatically if the magnet was in the box.
dave
Midrange should improve dramatically if the magnet was in the box.
dave
Is it made out of sliced cheese per chance? I think with a little bacon and mayo we might have the ultimate diy lunch... I mean, speaker.
Serious side though. Back in my earlier expirements with line length, I tried a 4.5" Pioneer with an fs of about 60hz in an 9+ foot folded line contraption. Longer line length equalled lower bass right? Actually I created an almost perfect noise trap by the end of the line. I could almost hear bass... almost.
In your design, length may not be the limiting factor so much as the volume of your line and the many curves which will further dampen your sound (and frequency range).
Serious side though. Back in my earlier expirements with line length, I tried a 4.5" Pioneer with an fs of about 60hz in an 9+ foot folded line contraption. Longer line length equalled lower bass right? Actually I created an almost perfect noise trap by the end of the line. I could almost hear bass... almost.
In your design, length may not be the limiting factor so much as the volume of your line and the many curves which will further dampen your sound (and frequency range).
As nobody has yet to ask: how does it sound to you? Are you getting the desired sound you were after or prefer? What is important, at the end of the day, is how it sounds to you.
@ h@kan, I flipped it around because then i was able to get the total labyrinth into a smaller space and also to protect the driver. It is 8cm long by 1cm wide. The total line is approx~ 106cm long and gives a tuning of 80hz.
@LCole, afaik aren't t-lines are supposed to be built around the drivers FS?
When i first tested it out i was like "woooowwwwww". Then my bro came in and asked whether my other subwoofer (t-lines too) was on and i said no. He was pretty amazed too. It has good punchy bass for its size. It goes down to about 60hz before dropping off. So at the end, i'm extremely happy with my 'experiment'😀
I might record a video of it in action if i can get hold of a camera...
T-lines ROCK!
@LCole, afaik aren't t-lines are supposed to be built around the drivers FS?
When i first tested it out i was like "woooowwwwww". Then my bro came in and asked whether my other subwoofer (t-lines too) was on and i said no. He was pretty amazed too. It has good punchy bass for its size. It goes down to about 60hz before dropping off. So at the end, i'm extremely happy with my 'experiment'😀
I might record a video of it in action if i can get hold of a camera...
T-lines ROCK!
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