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