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“TRUENO” - A 3-Way Vented Enclosure with 18 Inch Sub, 10 Inch Mid and a Compression Drive.

Wharfedale Diamond 11.2 Speakers

sadik

Well-Known Member
Joined
Jun 14, 2015
Messages
783
Points
93
Location
Vadodara
I have shared many of my projects in this forum, but this is going to be one of the giant project so far because of the size of its driver. I have named these gaints as “TRUENO” it is a Spanish word for “clap of thunder”. I will be using (biggest size for me till date) An 18 inch low frequency transducer having Fs: 33hz with power rating of 900 watts RMS. The mids will be supported by 10 inch Low-Mid frequency transducer having Fs: 65hz & Highs will be taken over by 1.4” High Frequency Compression Driver capable of handling power of 90 Watts RMS @ 1.5 khz, fixed to a horn which will cover 80 deg angle in horizontal plane and 50 deg angle in vertical plane. Forgive me i have not mentioned the model and make of drivers as the owner has asked me not to mention them anywhere & I respect his words.

I have selected Russian birch ply for this enclosure. A 25mm thickness will be used on the front where drivers are mounted. An additional ring of 19 mm thickness will be glued on the back side for mounting of woofer. The rest of the sides will be of 18 mm thickness.The Mid will have its own dedicated chamber to prevent distortion of cone which could happen due to pumping of air by the sub. We do not have to worry about this for compression drive so our compression drive and sub will share common chamber. As usual all cutting is done on CNC. Enjoy the built process till now.

Below are the photos of cutting. Benefit of CNC cutting is we don't have to worry about the shape. We can cut it in any shape. Those on the top are the braces. Those braces are cutted in such a way that it will provide adequate support as well as it will help in free movement of air inside the enclosure, on the topping the edges of braces are rounded off to minimize any kind of turbulence noise inside enclosure.
IMG_20200621_133440.jpg

Next photo is of front where drivers will be mounted, all drivers will be mounted with L N bolt and a T nut. & Below this photo you can see the ring. This ring will be glued on the backside of the front where the woofer will be mounted for extra support.
IMG_20200621_134351(1).jpg
IMG_20200621_134353.jpg

Now the assembly works starts. Forgive me i did not take many pictures throughout the built journey. In below photo bracing assembly starts. This brace will also provide support for the compression driver (I will call it “CD” in short) too. You can see the round at the bottom, that round will support the magnet of CD. Yes the Diameter of Magnet is almost 8 inch and it weight around 7 Kg.

IMG_20200626_180013.jpg

In below photo you can see the mid chambers are glued with the front.
IMG_20200715_110334.jpg

Now the front is being glued with the side wall. The ring is also been glued on its place. Then the braces will be glued after that another side wall will be glued then Top, after that back & in the end bottom.
IMG_20200715_164712.jpg
IMG_20200718_180039.jpg
IMG_20200719_122038.jpg

Do not dare to point out my tummy.... lol. In below pic you can see me as well as the other side wall being glued.
IMG_20200719_180142.jpg
IMG_20200719_180153.jpg

I don't have clamps which are longer than 36 inch so i had to do some desi jugaad for clamping the top wall. I am not explaining the jugaad you can get the idea after having a look on the below photos.
IMG_20200722_173346.jpg
IMG_20200722_173354.jpg

But then i learned a new trick to extend the clamps someone guided me in a right direction and i picked it up. You can view it in the below video.

This is the Progress till date. I will keep on updating as the journey moves ahead.
 

Rud31

Active Member
Joined
Oct 4, 2018
Messages
179
Points
28
Location
Delhi
Awesome as always, Sadik Bhai! Who did the crossovers this time? Aniket? Or are they yet to be done?
 

Kannan

Well-Known Member
Joined
Jan 13, 2008
Messages
1,814
Points
113
Location
Chennai
You are now truly exploring unchartered territories. That is some great effort there. Wishing you all success.
What about the crossover?
 

sadik

Well-Known Member
Joined
Jun 14, 2015
Messages
783
Points
93
Location
Vadodara
Great, how has he designed? With data sheet? The boxes are still WIP and drivers are not yet mounted. I need to learn this method.
Yes with the published parameters of drivers in datasheet. Final tuning will be done after measurements.
 

sandeepsasi

Active Member
Joined
Dec 14, 2018
Messages
71
Points
33
Location
Bangalore
Hi,

Great job!

Is it something similar to Troels Gravesen's The Loudspeaker/The Loudspeaker-2 builds?

With regards,
Sandeep Sasi
 

arunkvivek

Well-Known Member
Joined
Dec 2, 2015
Messages
644
Points
63
Location
Bangalore
Woah... you could name as Kelvinator - as big a fridge is definitely, raising temperatures of the viewers. Jokes apart, this is massive project!! Cant wait for the listening impressions.
 

krell

Well-Known Member
Joined
Feb 7, 2011
Messages
443
Points
63
Location
india
Amazing build ,i hope u r moving in right direction with the selection of drivers,all the best for ur project
 

sadik

Well-Known Member
Joined
Jun 14, 2015
Messages
783
Points
93
Location
Vadodara
Hi,

Great job!

Is it something similar to Troels Gravesen's The Loudspeaker/The Loudspeaker-2 builds?

With regards,
Sandeep Sasi
No it dose not have any connection with Troels. This is just a simple bass reflex enclosure a very common & easiest design actually.

Amazing build ,i hope u r moving in right direction with the selection of drivers,all the best for ur project
Even though its a DIY, it's a big investment. We have checked every factor and then only finalized the design, & from my past experiences i dont see it may go wrong anywhere.
 

Vineethkumar01

New Member
Joined
May 19, 2015
Messages
2
Points
3
Location
Bangalore
I have shared many of my projects in this forum, but this is going to be one of the giant project so far because of the size of its driver. I have named these gaints as “TRUENO” it is a Spanish word for “clap of thunder”. I will be using (biggest size for me till date) An 18 inch low frequency transducer having Fs: 33hz with power rating of 900 watts RMS. The mids will be supported by 10 inch Low-Mid frequency transducer having Fs: 65hz & Highs will be taken over by 1.4” High Frequency Compression Driver capable of handling power of 90 Watts RMS @ 1.5 khz, fixed to a horn which will cover 80 deg angle in horizontal plane and 50 deg angle in vertical plane. Forgive me i have not mentioned the model and make of drivers as the owner has asked me not to mention them anywhere & I respect his words.

I have selected Russian birch ply for this enclosure. A 25mm thickness will be used on the front where drivers are mounted. An additional ring of 19 mm thickness will be glued on the back side for mounting of woofer. The rest of the sides will be of 18 mm thickness.The Mid will have its own dedicated chamber to prevent distortion of cone which could happen due to pumping of air by the sub. We do not have to worry about this for compression drive so our compression drive and sub will share common chamber. As usual all cutting is done on CNC. Enjoy the built process till now.

Below are the photos of cutting. Benefit of CNC cutting is we don't have to worry about the shape. We can cut it in any shape. Those on the top are the braces. Those braces are cutted in such a way that it will provide adequate support as well as it will help in free movement of air inside the enclosure, on the topping the edges of braces are rounded off to minimize any kind of turbulence noise inside enclosure.
View attachment 48087

Next photo is of front where drivers will be mounted, all drivers will be mounted with L N bolt and a T nut. & Below this photo you can see the ring. This ring will be glued on the backside of the front where the woofer will be mounted for extra support.
View attachment 48090
View attachment 48091

Now the assembly works starts. Forgive me i did not take many pictures throughout the built journey. In below photo bracing assembly starts. This brace will also provide support for the compression driver (I will call it “CD” in short) too. You can see the round at the bottom, that round will support the magnet of CD. Yes the Diameter of Magnet is almost 8 inch and it weight around 7 Kg.

View attachment 48092

In below photo you can see the mid chambers are glued with the front.
View attachment 48093

Now the front is being glued with the side wall. The ring is also been glued on its place. Then the braces will be glued after that another side wall will be glued then Top, after that back & in the end bottom.
View attachment 48094
View attachment 48096
View attachment 48097

Do not dare to point out my tummy.... lol. In below pic you can see me as well as the other side wall being glued.
View attachment 48098
View attachment 48099

I don't have clamps which are longer than 36 inch so i had to do some desi jugaad for clamping the top wall. I am not explaining the jugaad you can get the idea after having a look on the below photos.
View attachment 48100
View attachment 48101

But then i learned a new trick to extend the clamps someone guided me in a right direction and i picked it up. You can view it in the below video.

This is the Progress till date. I will keep on updating as the journey moves ahead.
Awesome Sadik.
Your builds are always a treat to watch and learn. :)
 
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