This thread is being started as an OT discussion from the Tabaq thread. The design is a compact flat wall mountable stereo speaker that has great midrange clarity and pretty decent bass extension due to the mass loaded transmission line (MLTL) approach that was added to the original design based on this thread. The original open-ended TL design looked like this:
I modified the dimensions of that design to fit two speakers on a single panel of 20in x 30in foam core board. The revised design plan is as follows (added 1.0in x 2.2in x 2.44in long vents):
Here are some photos of what it looks like:
Close up of the constrictor vent:
If you want, you can decorate with a picture frame (the craft stores have a ready-made 20in x 30in frames in stock) and a poster or picture to look like this (this one has a built in class D amp and BlueTooth connectivity in addition to 3.5mm stereo jack):
Several people have built this with good success. Some have split it off to be a single (non-stereo) speaker.
Here is a sound clip:
diyAudio
Here are measurements of the vent bass output:
Here are more recent measurements from a meter away with speaker mounted on wall at 53in driver height from floor. The wall and room combine to extend the bass to a very deep 30Hz, albeit lower amplitude (but still very present). The drop off below 100Hz is due partly to room modes and also just fall off with distance:
The impulse and step response are quite nice:
I modified the dimensions of that design to fit two speakers on a single panel of 20in x 30in foam core board. The revised design plan is as follows (added 1.0in x 2.2in x 2.44in long vents):
Here are some photos of what it looks like:
Close up of the constrictor vent:
If you want, you can decorate with a picture frame (the craft stores have a ready-made 20in x 30in frames in stock) and a poster or picture to look like this (this one has a built in class D amp and BlueTooth connectivity in addition to 3.5mm stereo jack):
Several people have built this with good success. Some have split it off to be a single (non-stereo) speaker.
Here is a sound clip:
diyAudio
Here are measurements of the vent bass output:
Here are more recent measurements from a meter away with speaker mounted on wall at 53in driver height from floor. The wall and room combine to extend the bass to a very deep 30Hz, albeit lower amplitude (but still very present). The drop off below 100Hz is due partly to room modes and also just fall off with distance:
The impulse and step response are quite nice:
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Hey X
i also build the Vifantastisch
and like the sound of the original build.
But your measurements
http://www.diyaudio.com/forums/atta...rd-speaker-enclosures-flat-mltl-freq-resp.png
look intriguing, what are the exact dimensions of your constrictor vent?
I want to try it out
Cheers
i also build the Vifantastisch
and like the sound of the original build.But your measurements
http://www.diyaudio.com/forums/atta...rd-speaker-enclosures-flat-mltl-freq-resp.png
look intriguing, what are the exact dimensions of your constrictor vent?
I want to try it out
Cheers
Hey X
i also build the Vifantastisch
But your measurements
http://www.diyaudio.com/forums/atta...rd-speaker-enclosures-flat-mltl-freq-resp.png
look intriguing, what are the exact dimensions of your constrictor vent?
I want to try it out
Cheers
Hi Sayrum,
It was you who turned me into this speaker and the TC9FD. The constrictor is in the drawing - probably not clear but 1.0in x 2.2in x 2.44in long. Note that my main box size is different to fit sheet of foam core.
do you mean this one ???
http://www.diyaudio.com/forums/full-range/231951-accidental-mltl-technique-16.html#post3466655
can you give detail box dimensions ?
Hey xrk971
and to introducing here in the full range forum more measuring + judging by ones own listening experiences and less just "believing" hypes about certain drivers + what they are supposedly capable of...
So the vent is 1" + 2.2" and extends 2.4" into the line?
Sorry for the OT!
I know. Am glad you took it as an incentive and went to develope your own speakers
and to introducing here in the full range forum more measuring + judging by ones own listening experiences and less just "believing" hypes about certain drivers + what they are supposedly capable of...
So the vent is 1" + 2.2" and extends 2.4" into the line?
Sorry for the OT!
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thanks
how much distance from center speaker to left box or right box (red line at attachment ) ?
speaker box can be split into two speaker boxes ???
http://www.diyaudio.com/forums/showthread.php?p=4361230
This post references the vifa.
Sent from my SM-G920F using Tapatalk
I agree, maybe a mod can create a new thread and pull these last few posts off and over?
Looks great. You will need to put stuffing from closed end to just past driver. You will also need a bunch of little braces to keep the panels from vibrating. There are photos of it in both my foam core thread and the Vifafantaskic thread.
This might be a design that's in between the Cornu and the Vifantantisch.
At 12cm deep, it could easily be mounted on a wall.
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At 12cm deep, it could easily be mounted on a wall.
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