My DIY speakers -"J&N"

[jororaitchev]

When everything is created by your hands, the pleasure is endless!

 

[Porsche]

nice looking, we build ours in house as well for our clients, i agree, very satisfying. what our your driving the seas with? how they sound?

 

[jororaitchev]

nice looking,........ what our your driving the seas with? how they sound?

Thanks, Porsche!
It is possible with this graphic to get an idea of the sound;
OPPO 105D; HEGEL360; Denon AVC X8500HA

 

[jororaitchev]

I will show you one of my projects I had to change it , basically right at the very beginning - Rear speakers -”J&N”sr.
We all know, what is the ideal shape for the speakers- sphere. For technological reasons, it is difficult to do, especially with three tape loudspeakers. I strive to make the second most effective form - the egg. To begin with, I schematically design this way.I calculate the approximate volume, how do I find the right volume, will show you later in my project .
The loudspeakers are "SEAS"- Excel T25CF002 ", W18EX001- 6,5" . Everything is handmade, no "CNC" machine is used.
First option;

 

[jororaitchev]

Тhe internal structure of the cabinets;

 

[jororaitchev]

A few elements from the front panel processing;

 

[jororaitchev]

For the next stage / the shells of the cabinets / I made this "home matrix", with its help I bent 8 layers with 4 mm beech plywood;

 

[JayT]

Very impressive build! They look gorgeous and I bet sound great.

 

[BobInWI]

Have to congratulate the OP. His design & woodworking skills are considerable.
That is an exceptional build.

 

[Mikado463]

I've gotta say it again.......... Wow !!

My hats off and I bow before you, superb work !!

 

[jororaitchev]

Very impressive build! They look gorgeous and I bet sound great.

Thanks, JayT !

 

[jororaitchev]

Have to congratulate the OP. His design & woodworking skills are considerable.
That is an exceptional build.

Thanks a lot, BobInWI !

 

[jororaitchev]

I've gotta say it again.......... Wow !!

My hats off and I bow before you, superb work !!

Thank you for your evaluation of my work, Mikado463!

 

[jororaitchev]

I am approaching to the measurement of the internal volume. From waste material I made this gadget ,that takes part in the measurements and when assembling the cabinet;

 

[jororaitchev]

- My method of finding an internal volume of a complex construction was discovered about 2500/ from the Archimedes genius/.
The volume per liter of water is equal to the volume of 1 kg. and 1l. Water = 1 kg,
-their specific resistances are the same, with very little error.
I will say it in a more understandable way:
- if we have 20 liters of water in a bucket, this bucket will weigh approximately -20 kg.
- if we have another liquid in this bucket, we may have 20 liters, but we will not have 20 kg.
In my method of measurement, i do not immerse the inner construction in the water, just I measure the weight and deduct it from the total volume.
There is no simpler and more accurate method for finding the volume of a complex body,
Archimedes method is flawless!
In my method of measurement, i do not immerse the inner construction in the water, just I measure the weight and deduct it from the total volume.
There is no simpler and more accurate method for finding the volume of a complex body,the method of Archimedes is flawless!
Any other material we use to fill, we need to know the "ro" of this material.
On the second picture, the red line is the waterline, the vas of cabinet must be fill with water next to it / everything must be perfectly horizontally!/.

In this photo the red line is the waterline, the vas of cabinet must be fill with water next to it / everything must be perfectly leveled/.

 

[jororaitchev]

Let's assume that the density of MDF is 0.75 kg. of cubic decimeter/ average value by tables /. This is 75% of the actual reduced volume. The reduced volume error is: 3.5 / 0.75 = 4.6 liters actual reduced volume, and the whole volume is 43-4.6 = 38.4 liters. The total error of 39.6 liters is 1.2 liters or -3.1%.The ways to reduce the insaid of volume, are incomparably easier than the increase, the point is that this is the desired vision and the compensation must be done inside the volume. At this volume, I can safely mount another W18EX001, i. we are talking about a 2, 1/2 tape loudspeaker and that sends the project into an initial phase.
The old project stayed in the past ...
The new one project;

 

[Grand_Soir]

interesting, thanks for sharing

 

[jororaitchev]

The pleasure is incomparable, when everything is created by your hands!
Christmas mood;

 

[jororaitchev]

After preprocessing of the internal ribbing I can now start collecting the cabinets;
Now I can make the exact measurement of the volume.
And that's 31.5l, just as much as I need! Further processing of the internal ribs follows;

 

[jororaitchev]

Housing assembly;