Hej Elleman
Nice! I might do something similar...
Did you do any test? How do they sound?
I am curious about materials you used in proto, also what materials you will use for end product, any stuffing?
Is it important the seal between panel and walls? What did you used?
About the panel material , maybe using a more flexible panel, if you cut it wider on top you can get more volume and more parabolic shape
Imagine the foam core board, like in the thread
http://www.diyaudio.com/forums/full-range/223313-foam-core-board-speaker-enclosures.html
For low power applications works fine, the sealing on the edges might be quite good being foam, and if you cut some horizontal lines, so material can be curved, you can get a bigger and bigger opening
Modelling in hornresp would be a different story, challenging at least...
Also the sides of the panel must be cut with curved shape (not as easy), but can be obtained from 3d modelling software
Example with some sections cut horizontally, bending each section outwards 2º from the previous one (vs straight triangular panel)
But angle could also be increased as approaching to the end
And once fixed to the wall with some tension, panel might be sturdy enough
mRRk
Nice! I might do something similar...
Did you do any test? How do they sound?
I am curious about materials you used in proto, also what materials you will use for end product, any stuffing?
Is it important the seal between panel and walls? What did you used?
About the panel material , maybe using a more flexible panel, if you cut it wider on top you can get more volume and more parabolic shape
Imagine the foam core board, like in the thread
http://www.diyaudio.com/forums/full-range/223313-foam-core-board-speaker-enclosures.html
For low power applications works fine, the sealing on the edges might be quite good being foam, and if you cut some horizontal lines, so material can be curved, you can get a bigger and bigger opening
Modelling in hornresp would be a different story, challenging at least...
Also the sides of the panel must be cut with curved shape (not as easy), but can be obtained from 3d modelling software
Example with some sections cut horizontally, bending each section outwards 2º from the previous one (vs straight triangular panel)
But angle could also be increased as approaching to the end
And once fixed to the wall with some tension, panel might be sturdy enough
mRRk
They sound alright and fits the purpose perfectly since the music is just there. Not really a point origin so to speak.
I built these ones from two shelves i had laying around which were 295X1800mm so the dimensioning was accommodated to fit that, as seen in the hornresp simulation i posted earlier. I have some stuffing below the speaker as well as a little bit shoved in just above it and this helped the characteristics a bit.
I had some self adhesive foam strips that i attached to the chamfer of the board that then got mushed together in the mounting. As you can see from the picture of the first prototype vs the 2, i have added more screws. the board did vibrate a bit too much and i had to secure it more to make it rigid and seal to the wall. I would suggest to glue them for the permanent mounting. I would also warn about that the panels themselves becomes a bit of a resonance surface if they panel are a bit flimsy, but as handled in the Foam core speaker thread, this might not be as big of an issue. Could also be that if i use a proper plywood material it would behave allot better than this shitty shelf material.
since it's such a simple "build" i would suggest to experiment! of course the wall will take a hit but if it's going to end up something there eventually, just go for it!
I built these ones from two shelves i had laying around which were 295X1800mm so the dimensioning was accommodated to fit that, as seen in the hornresp simulation i posted earlier. I have some stuffing below the speaker as well as a little bit shoved in just above it and this helped the characteristics a bit.
I had some self adhesive foam strips that i attached to the chamfer of the board that then got mushed together in the mounting. As you can see from the picture of the first prototype vs the 2, i have added more screws. the board did vibrate a bit too much and i had to secure it more to make it rigid and seal to the wall. I would suggest to glue them for the permanent mounting. I would also warn about that the panels themselves becomes a bit of a resonance surface if they panel are a bit flimsy, but as handled in the Foam core speaker thread, this might not be as big of an issue. Could also be that if i use a proper plywood material it would behave allot better than this shitty shelf material.
since it's such a simple "build" i would suggest to experiment! of course the wall will take a hit but if it's going to end up something there eventually, just go for it!
i would have gone with this idea so as to raise the driver from being at bellybutton height.
and i'd make them red to match the curtains!
Last edited:
i like the curtains and Christmas but after this past winter the snow can't melt fast enough for my liking!!
if angled down slightly having them higher would mean them being heard through out the kitchen...kitchen parties are the best, never have to go far for the next round and food's close.
if angled down slightly having them higher would mean them being heard through out the kitchen...kitchen parties are the best, never have to go far for the next round and food's close.
To comment on my own comment.
To be honest I am a bit disappointed at the lack of depth for the size. Earlier in the thread i made a smaller bib of the 3fe25 which i would say performed on a similar level if not better.
The peak around 120hz seems to be due to the room and not really possible tame in a good way.
If i compare to the same drivers in my 3d printed egg speakers the response looks like this before and after EQ at a distance of about 1 meter (the listening position since it is for the PC). the resonance peak at approx 120 hz here is a mix of the tuning frequency of the boxes, the corner/room position etc. But here i could fairly easy compensate with an EQ, as the green line is the actual measurement and not calculated. I guess it is due to the direct sound instead of the bibs relaying on the room which makes them more difficult to tame..
I will measure these outside when i get the chance to see their actual response.