Hello everyone, I am from Indonesia and newbie to DIY audio enthusiast, actually vacum for around 25 years after working as an employee.
Now just retired, looks like there are challenging in design of Transmission Line box with full range driver especially SB Acoustic produced in Surabaya, Indonesia has launched SB Acoustic SB20FRPC30-8 8 inch.
Is there any software running in Mac OS, using Macbook Air M2 to design & test Transmission Line box and what kind tools supporting?
Or anybody has built Transmission Line box with this driver, any link video test sound?
I have its detail specification from factory.
Thank you everyone.
Now just retired, looks like there are challenging in design of Transmission Line box with full range driver especially SB Acoustic produced in Surabaya, Indonesia has launched SB Acoustic SB20FRPC30-8 8 inch.
Is there any software running in Mac OS, using Macbook Air M2 to design & test Transmission Line box and what kind tools supporting?
Or anybody has built Transmission Line box with this driver, any link video test sound?
I have its detail specification from factory.
Thank you everyone.
One starting point if you can't find TL designs already for SB20FRPC30-8 driver is to search for TL designs that used the Hemp Acoustics FR8C driver in the past. It's design and specs are similar to the SB 8" driver. There are many posts about the FR8C on this forum and others audio forums.
Besides the FR8C the Wild Burro "Betsy-K" is another somewhat similar FR driver you can search for TL designs using that one too.
Unfortunately a significant amount of the content, and knowledge, of past experiments has been lost due to people uploading images to websites that no longer exist (broken URLs).
Besides the FR8C the Wild Burro "Betsy-K" is another somewhat similar FR driver you can search for TL designs using that one too.
Unfortunately a significant amount of the content, and knowledge, of past experiments has been lost due to people uploading images to websites that no longer exist (broken URLs).
You lucky bugger… nice machine. Note that the lastest Parallels will run windows faster than Intel boxes even thou emulation ises Rosetta.
Uf the sowfware (we are limited to HornResp, the TL Emulator here (https://www.diyaudio.com/community/threads/transmission-line-modelling-software.220421/), and a new one under development here, might run wunder WINE, the slick commercial verso is Crossover.
Demetri (an ML-Voigt)has been succesfully used with the Hemp Acoustics: Demetri <http://frugal-phile.com/boxlib/P10free/Demetri-MLV-2v01-map-090216.pdf>
Dave
But IME almost always can be found on the Internet Archive/Wayback Machine, which is currently offline. 🙁
FYI, just saw another somewhat similar 8" FR driver, the Gradient Axis AX-08, so that might be another one you can search for previous TL designs on.
Thanks for the reply.
Unfortunately, I can not find the link Hemp Acoustics FR8C do you mind sharing the link?
Hmm, hadn't thought about imageshack since I never used it, though AFAIK those aren't archived, ditto some embedded in early forums.
Specs
Actually, Google returned this from here last Dec. plus the factory pdf and other design threads.
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Im daying you have to search for things like "FR8C transmission line" on google and diyaudio.com
Another version of WINE. If i can find one that will run WT2 i can retire my PC a MacPro running XT)
Thanx
dave
Hemp Acoustics,
http://web.archive.org/web/20060115163727/http://www.hempacoustics.com/products.html
picture shows a RL Acoustic Loudspeaker using HEMP ACOUSTICS Neo-Rite 8 inch full range. (is this the same as the Hemp FR8C ? with a square frame?)
http://web.archive.org/web/20060115151919/http://www.hempacoustics.com/gallery.html
Note to OP-this is not a transmission line- Mauhorn (look up Mauhorn, Mauhorn plans)
RL Acoustic Loudspeaker
http://www.rlacoustique.com/lamhorn.htm
http://6moons.com/audioreviews/lamhorn/18.html
from 6moons
"RL Acoustique Lamhorns 1.8 with AER MK-1 drivers
The Lamhorns first appeared in 1997. They are designed and manufactured by RL Acoustique of Montreal. RL Acoustique is owned and operated by Robert Lamarre and the Lamhorns are his creation, hence Lam[arre] horn. The 1.8 refers to the length of the folded back horn (in meters, please). I asked Robert Lamarre about how the Lamhorns first came into being and evolved to the current 1.8 model:
"The design all started when I became fed up with trying to build a decent 3-way system with EdgarHorns called the System 100 in the early 90s. It turns out that I needed a sub to go below 100Hz. So I would require a fourth driver. This was getting a little much for someone who appreciated the simplicity of a low-powered single-ended AudioNote Kit One 300B amplifier. So I began investigating the other extreme and through reading Sound Practices and hearing my first Lowther-based cabinets, I fell in love with the sound. It was by no way perfect but it had the immediacy and dynamics I was missing in standard loudspeakers. So my quest began.
" After reading all I could on the Internet, I found the Mauhorn designs quite interesting but wanted to improve on them. This led to my first horn, the Lamhorn 3.5. It had a horn length of 3.5 meters. Although quite good, the cabinet was 40" h by 12.5" wide and 32" deep and still not up to what I wanted. This design evolved into the Lamhorn 2.0 which at 60" was now much taller but only 19" deep. I did my first show in Malaysia with the Lamhorn 2.0 in 1997, accompanied by Allen Wright of the famed Cables Cookbook. I then experimented with shorter cabinets playing with different horn lengths to finish off at 1.8 meters. Hence the Lamhorn 1.8. This was in 1999."
8" Lowther in a modified Mauhorn
https://www.homebuilthifi.com/project/6947
FR8C Cabinet hemp Acoustics F.U.N Apragrande
http://users.atw.hu/bazsielektron/Hang Box/HEMP Acoustics F.U.N. - ApraGrande.pdf
http://web.archive.org/web/20060115163727/http://www.hempacoustics.com/products.html
picture shows a RL Acoustic Loudspeaker using HEMP ACOUSTICS Neo-Rite 8 inch full range. (is this the same as the Hemp FR8C ? with a square frame?)
http://web.archive.org/web/20060115151919/http://www.hempacoustics.com/gallery.html
Note to OP-this is not a transmission line- Mauhorn (look up Mauhorn, Mauhorn plans)
RL Acoustic Loudspeaker
http://www.rlacoustique.com/lamhorn.htm
http://6moons.com/audioreviews/lamhorn/18.html
from 6moons
"RL Acoustique Lamhorns 1.8 with AER MK-1 drivers
The Lamhorns first appeared in 1997. They are designed and manufactured by RL Acoustique of Montreal. RL Acoustique is owned and operated by Robert Lamarre and the Lamhorns are his creation, hence Lam[arre] horn. The 1.8 refers to the length of the folded back horn (in meters, please). I asked Robert Lamarre about how the Lamhorns first came into being and evolved to the current 1.8 model:
"The design all started when I became fed up with trying to build a decent 3-way system with EdgarHorns called the System 100 in the early 90s. It turns out that I needed a sub to go below 100Hz. So I would require a fourth driver. This was getting a little much for someone who appreciated the simplicity of a low-powered single-ended AudioNote Kit One 300B amplifier. So I began investigating the other extreme and through reading Sound Practices and hearing my first Lowther-based cabinets, I fell in love with the sound. It was by no way perfect but it had the immediacy and dynamics I was missing in standard loudspeakers. So my quest began.
" After reading all I could on the Internet, I found the Mauhorn designs quite interesting but wanted to improve on them. This led to my first horn, the Lamhorn 3.5. It had a horn length of 3.5 meters. Although quite good, the cabinet was 40" h by 12.5" wide and 32" deep and still not up to what I wanted. This design evolved into the Lamhorn 2.0 which at 60" was now much taller but only 19" deep. I did my first show in Malaysia with the Lamhorn 2.0 in 1997, accompanied by Allen Wright of the famed Cables Cookbook. I then experimented with shorter cabinets playing with different horn lengths to finish off at 1.8 meters. Hence the Lamhorn 1.8. This was in 1999."
8" Lowther in a modified Mauhorn
https://www.homebuilthifi.com/project/6947
FR8C Cabinet hemp Acoustics F.U.N Apragrande
http://users.atw.hu/bazsielektron/Hang Box/HEMP Acoustics F.U.N. - ApraGrande.pdf
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These 2 have similar specs - Hemp 8" FR8C & Hemp 8" FR8.0DIY
http://www.tornadoacoustics.ru/_fr/1/FR8C.pdf
http://web.archive.org/web/20051219170245/http://www.hempacoustics.com/FR810HQ_10-3-05.pdf
post#9 specs are different for the FR8C (than above), but closer to the SB20
Versus
SB Acoustics specs
https://sbacoustics.com/product/8in-sb20frpc30-8-paper/
FR8.0DIY Bass Reflex Cabinet Diy, Ultra Fi Times Mar 2006, Larry Moore
http://web.archive.org/web/20061029004511/http://www.hempacoustics.com/Review.pdf
A big cabinet (Bass Reflex-not TL per OP),
from the article page 4, "a box volume of 87 liters with a port of 4 inches in diameter and 3 inches long... with the center of the cone at ear level, approximately 32 inches from the floor."
http://www.tornadoacoustics.ru/_fr/1/FR8C.pdf
http://web.archive.org/web/20051219170245/http://www.hempacoustics.com/FR810HQ_10-3-05.pdf
post#9 specs are different for the FR8C (than above), but closer to the SB20
Versus
SB Acoustics specs
https://sbacoustics.com/product/8in-sb20frpc30-8-paper/
FR8.0DIY Bass Reflex Cabinet Diy, Ultra Fi Times Mar 2006, Larry Moore
http://web.archive.org/web/20061029004511/http://www.hempacoustics.com/Review.pdf
A big cabinet (Bass Reflex-not TL per OP),
from the article page 4, "a box volume of 87 liters with a port of 4 inches in diameter and 3 inches long... with the center of the cone at ear level, approximately 32 inches from the floor."
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for inspiration.SB Acoustics SB23NRXS45-4 MLTL
8" different specs
https://sbacoustics.com/product/8-sb23nrxs45-4-norex/
https://audiokarma.org/forums/index.php?media/albums/transmission-line-speaker-designs.1650/