3D printed horn speaker
Here are some photographs showing my prototype 3D printed horns. I modelled and printed the various parts myself -which took about two weeks of almost nonstop printing. I needed about 2000 meter of 3mm filament during the process...
The mid/high horn has a Le'Cleach curve with mouth termination of 360 degrees. I am thinking of starting a separate tread about these horns and how they are built and measured, if people are interested.
The driver is the well respected BMS 4592ND; when they were launched back then, I was one of the early purchasers as I saw the huge advantage of a coaxial driver, and I must say it was my best investment that got me years of joy.. uhhm it took a lot of time to dial in these drivers, but if you succeed you will be rewarded. DSP has made things so much easier...
My first horn with these drivers were a radial tractrix horn made of concrete. It was a good horn, but this one sound better to me. Actually it is impossible to compare, because I did not have a dsp at hand back then. It may also be better... I did not keep the old ones as I disposed them due to storage issues. One thing is for shure: the printed ones are much lighter.
I think these horns are pretty unique, I never found other examples of such a big horn 3D printed and I guess for a reason. I may release the design on thingiverse.com, if there would be a demand. I have a second pair waiting to be assembled, I will try them on Cabasse DOM8 drivers that I own and do not yet have a purpose for.
Here are some photographs showing my prototype 3D printed horns. I modelled and printed the various parts myself -which took about two weeks of almost nonstop printing. I needed about 2000 meter of 3mm filament during the process...
The mid/high horn has a Le'Cleach curve with mouth termination of 360 degrees. I am thinking of starting a separate tread about these horns and how they are built and measured, if people are interested.
The driver is the well respected BMS 4592ND; when they were launched back then, I was one of the early purchasers as I saw the huge advantage of a coaxial driver, and I must say it was my best investment that got me years of joy.. uhhm it took a lot of time to dial in these drivers, but if you succeed you will be rewarded. DSP has made things so much easier...
My first horn with these drivers were a radial tractrix horn made of concrete. It was a good horn, but this one sound better to me. Actually it is impossible to compare, because I did not have a dsp at hand back then. It may also be better... I did not keep the old ones as I disposed them due to storage issues. One thing is for shure: the printed ones are much lighter.
I think these horns are pretty unique, I never found other examples of such a big horn 3D printed and I guess for a reason. I may release the design on thingiverse.com, if there would be a demand. I have a second pair waiting to be assembled, I will try them on Cabasse DOM8 drivers that I own and do not yet have a purpose for.
Attachments
My Focal Chorus 705 V original and DIY 3rd Order crossover comparsion video,
Focal Chorus 705 V original and DIY 3rd Order crossover comparsion - YouTube
Focal Chorus 705 V original and DIY 3rd Order crossover comparsion - YouTube
Bravo bravo!
What is the xo F to the bass? Could you give some details on bass cabinet also?
Thank you!
I do not really use a fixed crossover point but I do use lowpass and highpass filters.
The basshorn covers 70hz-500hz approx. and the mid/high horn fall off gradually below 300-350hz. I try to use natural roll-off as much as possible and filter only to reduce cone/diafragm movement or to avoid high frequency rubbish.
I might publish some measurements when I am done with some adjustments
Hi Wolf,
indeed that is a glass/vacuum capacitor of only a handfull of pF's.
Just clipping of some edgy sound. Playing with Duelunds, Silver-Mica's and glass/vacuum as bypass-caps. All very small values.
No need for large values as this will change the XO-freq but large enough that a sharp edge is gone.
Regards,
Reinout
indeed that is a glass/vacuum capacitor of only a handfull of pF's.
Just clipping of some edgy sound. Playing with Duelunds, Silver-Mica's and glass/vacuum as bypass-caps. All very small values.
No need for large values as this will change the XO-freq but large enough that a sharp edge is gone.
Regards,
Reinout
These are Celestion types.
More info here: Yet another large coax build Celestion FTX1225 (ongoing, advice needed)
Another of those crazy projects finished (finally). Saw a pair of bamboo bowls at IKEA and decided to get a pair and build small portable speakers. After three years they are finished.
Using Swann B3n (I think) and cheap Chinese ribbon speakers and a simple 2-way 6 dB filter. I had to get them ready for a DIY/HiFi-summit in November, as the Dayton Audio exciters still (after 2 months) haven't arrived. Had planned to use them in 2.1-system, so I may have to make some changes in my plans.
(And the 10" Dayton driver seems to have stranded somewhere as well).
Using Swann B3n (I think) and cheap Chinese ribbon speakers and a simple 2-way 6 dB filter. I had to get them ready for a DIY/HiFi-summit in November, as the Dayton Audio exciters still (after 2 months) haven't arrived. Had planned to use them in 2.1-system, so I may have to make some changes in my plans.
(And the 10" Dayton driver seems to have stranded somewhere as well).
Attachments
I built a set of small sealed monitor type speakers. These are in my living room on Atacama 600mm tall stands. Powered by 6 channels of Tom Christiansen’s Modulus 86. Crossovers are all digital in an Analog Precision Ultimate Preamp. 4th order LR acoustic all round although still fiddling that and I need to perform some additional measurements. All of the crossovers are based on 2nd order biquads. All balanced interconnects pre to power.
Speakers are Eton 8- 412/C8/32; mids are a SS Discovery 10-F8424 and tweeters are Beyma TPL-75.
It’s quite clean but not particularly dynamic.
Speakers are Eton 8- 412/C8/32; mids are a SS Discovery 10-F8424 and tweeters are Beyma TPL-75.
It’s quite clean but not particularly dynamic.
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