[jororaitchev]

Oh I see. My reasoning/estimation was the bracing was looked like it was taking up about one eighth volume (pure guess based on stacking heights), but then with all the holes cutting out maybe 60% of the bracing... it worked out to 5% 

Soon I will do the measurement and there will be some photos, you may be a winner.

[jororaitchev]

Project "J&N-2",




Why and how should a beautiful project be changed at the outset?
The problem is in the frequency of around 5000Hz; There is a peak ,which strongly influences the average frequencies.There are two ways to solve this problem:
- Adding one more MW,
-More complicated construction of the filter I don't know the exact name , maybe (reager).
This project may be look beautiful, but will be changed.
As I wrote at the beginning of my post, everything is done by me, I do not use ready filters / and I do not recommend it to anyone unless it is a ready-made kit with cabinets /.Will try to explain why this project is changed at the very beginning.

[Armaegis]

Do you know the cause of the 5000Hz peak? Is it a cabinet resonance? If I were to make a guess, it would be based on the alignment and sizes of the holes cut. 5kHz is roughly 68mm.

[jororaitchev]

Do you know the cause of the 5000Hz peak? Is it a cabinet resonance? If I were to make a guess, it would be based on the alignment and sizes of the holes cut. 5kHz is roughly 68mm.

A very interesting assumption, but we can be a more serious.


Characteristics of the speaker in 55 liters closed volume:




Characteristics of speakers with and without filters:


Transmission characteristics of speakers:





What should I choose in this situation?
-1 option, add one more 18 FX001,
-2 option,remove one 26 FX001,
I chose a new progect with 4 identical speakers:1 х 26 FX001, 1х 22 FX001, 1х 18 FX001 , T 25 CF002
 

[Armaegis]

I'm not sure I understand. Volume typically affects low end behaviour, but treble response is usually more dimensional rather than volume dependent.

[JerryM]

Project "J&N-2",




Why and how should a beautiful project be changed at the outset?
The problem is in the frequency of around 5000Hz; There is a peak ,which strongly influences the average frequencies.There are two ways to solve this problem:
- Adding one more MW,
-More complicated construction of the filter I don't know the exact name , maybe (reager).
This project may be look beautiful, but will be changed.
As I wrote at the beginning of my post, everything is done by me, I do not use ready filters / and I do not recommend it to anyone unless it is a ready-made kit with cabinets /.Will try to explain why this project is changed at the very beginning.

Dude; that is fucking awesome. Please share more.

[jororaitchev]

Dude; that is fucking awesome. Please share more.

Sorry, I have nothing to share. Priority is the construction of the rear speakers !

[jororaitchev]

From waste material I made this gadget ,that takes part in the measurements and when assembling the cabinet:

,











There will be a sequel ...

[Armaegis]

You're secretly building a submarine aren't you? 

[jororaitchev]

Continue:
,

I fill the cabinet  with water to the red line / there ends the front panel with the speakers /.

.
 I find the volume - 43l, I deduct the weight of the internal ribbed - massa 3.4kg.
And the net volume of the cabinet is 39. 6l. More than I need, I need about 35l.
There is one more option, but for him later.

[jororaitchev]

The problem is that my investor likes the vision of the column.The decrease in volume must occur inside the construction of the cabinet.This sends the project in a more initial phase,we have a new requirement for the project, second W18 EX001.


The old project stayed in the past ...

[jororaitchev]

A little progress;




With the new interior design, the volume is 35.2 l

[jororaitchev]

Preprocessing of the internal ribbing;



I can now start collecting the cabinet;

[Letitroll98]

Looks great, but why do you apply finish to the internal bracing?  I assume no one will see it once the speaker is finished.

[jororaitchev]

Looks great, but why do you apply finish to the internal bracing?  I assume no one will see it once the speaker is finished.

After installation of the cabinet (without the front panel) I will do the second measurement of the volume after all additional  work - with water!
It is normal to pay proper attention to impregnation.

[jororaitchev]

I have an idea to make a new project to in the base there should be two 10" loudspeakers - just an idea. They look like animals, maybe dinosaurs/was mentioned in this post/, but important are 20Hz.

[Archguy]

I like the shape it's taking.  Was pretty much hoping it would end up like this.

[jororaitchev]

I like the shape it's taking.  Was pretty much hoping it would end up like this.

Thanks!
This is just an idea -  very expensive !

[jororaitchev]

I have an idea to make a new project to in the base there should be two 10" loudspeakers - just an idea. They look like animals, maybe dinosaurs/was mentioned in this post/, but important are 20Hz.

And the original model will look like this;

[jororaitchev]

I continue with the collection of the cabinet;


Now I can make the exact measurement of the volume. And that's 31.5l, just as much as I need!
Oh, l forget to show you what I did to get that volume!
I maked a filter compartment (for the MW and TW), the W section will be in the box;


I previously make the last layer-10 mm MDF / to get a sandwich construction / on the front panel , the bottom and the top;





 For the side panels, last layer is 1 x 4 mm plywood and everything is re ady for the measurements.