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

[newlash09]

How big is your house that you need 18" woofers?????

Bigger is always better

I can only imagine the naturalness and weight that a 18 inch bass driver and 10 inch mid range produce when housed in a large voluminous cabinet. Modern loud speakers due to shrinking spaces have become thin front baffled speakers with small drivers. Iam living with compromises like this...glad someone is lucky enough with space to house a awesome speaker like this

 

[newlash09]

Excellent, lovely and inspiring build again sadik bhai

Your build posts are all more porn than hifi

 

[sadik]

How big is your house that you need 18" woofers?????

This Speakers are not mine. I am making them for a client based locally. Plus I would like to say the sound from big speakers is something different. This is not possible with small drivers. Once you listen to big speakers believe me you will never go back with smaller ones.

Excellent, lovely and inspiring build again sadik bhai

Thanks Bro

Your build posts are all more porn than hifi

I am laughing after reading this comment.

 

[Sean de Silva]

Plus I would like to say the sound from big speakers is something different. This is not possible with small drivers. Once you listen to big speakers believe me you will never go back with smaller ones.

Amen The story of my life ! Nothing to beat that big room filling sound.

 

[manjulaltn]

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.

What an awesome build! Can't wait to see the finished product!

 

[prateekatasniya]

What are the crossover points for the speaker ?

 

[robin3989]

Gigantic and amazing build with your experienced wood working skills. I'm sure they will sound big and weigh heavy. Any estimate how much they are expected to weigh? You are an inspiration for members who like to step into DIY speaker build. Good luck

 

[oldmonk]

Very interesting build... large speakers have their plus points !

may we know the dimensions of the cabinet and the driver model numbers ?

which are the amplifiers and sourses that will be paired with this speaker and what will be the size of the listening room ?

Thank you !

 

[Passive_audio_enthusiast]

How did you design the crossovers ?

 

[sunilj]

Phenomenal work Sadik, you're an inspiration. Are the drivers off-the-shelf or vintage?

 

[sadik]

What are the crossover points for the speaker ?

250Hz & 1.2 Khz

Gigantic and amazing build with your experienced wood working skills. I'm sure they will sound big and weigh heavy. Any estimate how much they are expected to weigh? You are an inspiration for members who like to step into DIY speaker build. Good luck

They will Weight approx between 80 to 90 Kg each Enclosure. I am not a designer, I am Enclosure Builder & i share my built skills here. May be my skills help someone who needs to enter in this field.

Very interesting build... large speakers have their plus points !

may we know the dimensions of the cabinet and the driver model numbers ?

which are the amplifiers and sourses that will be paired with this speaker and what will be the size of the listening room ?

Thank you !

The Outer Dimensions are 1190 mm Height x 550 mm Width x 600 mm Depth. I cannot disclouse the driver details, the reason is stated in post#1

How did you design the crossovers ?

The crossover designing is done by another Forum Member. Its been designed with respect to the published parameters of the driver manufacturer.

Phenomenal work Sadik, you're an inspiration. Are the drivers off-the-shelf or vintage?

The Drivers are not Vintage

 

[Hiten]

Nice work ! Looks like compression driver is something special to handle power and comparatively low crossover point. Has the owner given permission to post pictures of speakers after final completion ?
Regards.

 

[sadik]

Nice work ! Looks like compression driver is something special to handle power and comparatively low crossover point. Has the owner given permission to post pictures of speakers after final completion ?
Regards.

Yes i will post the photos of this enclosures with drivers installed once it is completed.

Update

Both the enclosures are almost ready. I am waiting for crossover PCB and its components to arrive so that i can complete the pending work.. Just have a look at those Mammoths.



And some treat for the power tool lovers an additional collection in my power tools a Belt Sander and a Cordless Impact Wench.

 

[sandeepsasi]

Hi Sadik,

Is there any plan to add a supertweeter?

With regards,
Sandeep Sasi

 

[sadik]

Hi Sadik,

Is there any plan to add a supertweeter?

With regards,
Sandeep Sasi

No

 

[rsponline]

Monster coming soon

Great Stuff sadik bhai...

This is same plywood/mdf used everywhere or something else ?

 

[oldmonk]

Dear Sir

Can you please estimate the cost of the cabinet including the wood and cutting and assembly etc...for such big speakers

This will help the reader to know a ball park estimate .

Should not be a problem I think

Thank you

 

[sadik]

Monster coming soon

Great Stuff sadik bhai...

This is same plywood/mdf used everywhere or something else ?

This is Russian Birch Ply.

Dear Sir

Can you please estimate the cost of the cabinet including the wood and cutting and assembly etc...for such big speakers

This will help the reader to know a ball park estimate .

Should not be a problem I think

Thank you

The Complete cost of this project will be approx 2.30 Lacs.

 

[sadik]

Update
Today made the chamber for mounting crossover on the back side of speaker.




Sadik

 

[sunilj]

After the space taken up by the crossover, braces etc., whats the volume available for the bass driver ? Is the crossover based on this space?