Any resemblance to actual speakers and related concepts is coincidental

Hello!
I share with you a project considered and designed for years.
The project is 3 strips, each strip in its own volume.
First to show the speakers involved in the project.
https://photos.google.com/share/AF1...gcKI7snz0zc60A?key=ZHdEdndCcXotTS1NSHR1VXnXve
Bas
https://www.visaton.de/index.php/en/products/drivers/woofers/tiw-300-8-ohm

Among:
https://www.visaton.de/en/products/drivers/woofers/al-170-8-ohm


High frequency
https://www.visaton.de/en/products/drivers/ribbon-tweeters/mht-12-8-ohm


On the next link you can see the process of making the volumes.
The materials are birch plywood
https://photos.app.goo.gl/ypTtccbxvq4QMqbz8

In the following link the volumes are already painted by special technology.
https://photos.app.goo.gl/Spb4Zuoin8mVjo499

And here are the finished built speakers
https://photos.app.goo.gl/8j1CvY6hT7nbvJJY7
And in the following videos, in addition to seeing them, you can also hear them



I apologize if there is a misunderstanding of the text, but I use an interpreter and mistakes are possible.
 

Brett

Member
2002-01-07 6:02 pm
Hi,
I like your build and your workmanship is great. They look really good. It's very difficult to tell on a YT video how they sound, but my guess is very good.

Many years ago I sketched a similar type of build, long before I saw the Focals release, but never built them. I saw one of the TOTL or near TOTL Focals at a dealer I was passing sometime later when I was doing a system build and decided to try it on my surrounds at the time. Worked great except they were very large (15+10+1/WG) and the room was narrow so they were too close. Mine never made it past ugly unfinished mdf though. The next version will be in a room maybe 12x the volume, so I might have to revisit the concept.

Thanks for posting your build.
 

burnmaster

Member
2016-10-20 7:13 pm
Here's how I designed the angle correction for individual volumes.



20220125_082705.jpg



These are pads that are placed between the volumes in specially carved rails.
In the following photos, I lifted the box by hand to see how the connectors fit into both volumes.

20220125_092045.jpg



20220125_092104.jpg



Each volume has a set of 3 different angle pads, the fourth is flat. The draws keep the speakers fully upright.

This is how I designed them so that they can be adjusted for different rooms and different listening places.
 

Brett

Member
2002-01-07 6:02 pm
That's pretty much how I did mine, but I didn't think of including slots for the 'wedges', I just screwed them in as the boxes were only intended to be proof of concept. Your solution is more elegant and if I rebuild the next lot in a similar fashion, I'll use your idea.

I had the 15" enclosure angled back maybe 7*, the 10" vertical and the 1+WG about the same as the 15. I don't recall the exact numbers, I just did it with a tape measure, the HP48G and some trig.

PS: Is the 'paint' tinted Duratex?
 
Last edited:
PS: Is the 'paint' tinted Duratex?

Because the boxes and the finish of my boxes were made by some guys who specialize in the activity, I quote his words from another forum about my speakers.

In this case we use 3 coats transparent two-component polyurethane primer, then 4-5 coats two-component polyurethane paint.

Great embossed coating is obtained.
In this close-up photo, I tried to tell him.

20210125_135127.jpg
 
I'd like to ask more about the paint, too. I have used two component polyurethane paint but it does not have that rough (nice) texture, even when I choose 100% matt finish. Can you kindly ask the painter how they make that texture?

FWIW I've actually been choosing two component water based paint recently. I had no idea such a thing existed but it's awesome! Finish quality of solvent but no smell and easy clean-up. Only downside it's still slower to flash dry than solvent based.

Also, I like your choice of birch plywood, not only does it sound better but it's also less dusty when cutting it. OTHO needs more primer and filler than MDF for a smooth finish. Your painter wishes you choose MDF, haha.
 
I'd like to ask more about the paint, too. I have used two component polyurethane paint but it does not have that rough (nice) texture, even when I choose 100% matt finish. Can you kindly ask the painter how they make that texture?

FWIW I've actually been choosing two component water based paint recently. I had no idea such a thing existed but it's awesome! Finish quality of solvent but no smell and easy clean-up. Only downside it's still slower to flash dry than solvent based.

Also, I like your choice of birch plywood, not only does it sound better but it's also less dusty when cutting it. OTHO needs more primer and filler than MDF for a smooth finish. Your painter wishes you choose MDF, haha.


Well, as I said, I used the services of professionals, and I can't know the details about the painting. Even if I ask him, I don't know if I will be able to recreate what he said.

I claim that birch plywood is the best material for speakers. Hard and heavy.


Very nice woodwork.
Can you tell us about crossover? Is it passive or active, which frequencies and orders?

Speakers work with passive filters.
They are controlled by 2 special monoblock made by me.)))

As for the filters, I would prefer to leave the details to myself, for which I apologize.