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Thread: Joror's DIY Audio projects

  1. #21
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    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:/p-4,5/
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  2. #22
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    I have to make another post, sorry!

    My method of finding an internal volume of a complex construction was discovered long ago,
    the answer was given so many years ago,/about 2500/ of 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 pounds.
    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,
    Archimed's method 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!/.
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  3. #23
    Join Date: Jan 2009

    Location: Sheffield - UK

    Posts: 5,953
    I'm Mark.

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    Remarkable work - well done!

    100% Analogue

  4. #24
    Join Date: Mar 2010

    Location: Sheffield

    Posts: 2,575
    I'm Simon.

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    Stunning work, that's a real commitment to a big project.
    Kuzma Stabi/S 12", (LP12-bastard) DC motor and optical tacho psu, Benz LP, Paradise (phonostage). MB-Pro, Brooklyn dac and psu, Bruno Putzeys balanced pre, mod86p dual mono amps, Yamaha NS1000m

  5. #25
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    Quote Originally Posted by YNWaN View Post
    Remarkable work - well done!
    Thank you!

  6. #26
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    Quote Originally Posted by sq225917 View Post
    Stunning work, that's a real commitment to a big project.
    Thank you for the evaluation of my DIYers work!

  7. #27
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    And I am approaching to the measurement of the internal volume:
    I measure the weight of the my vented inner construction - 3.5 kg.
    -The amount of water is 42 l. in the box; the average value relative to the density of MDF is 0.75 kg. of a cubic decimeter,3,5/0,75=4,7l, 42-4,7l= 37.3l more than what's needed - what's next?
    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, another W18 EX001.The old project stayed in the past ...
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    Last edited by jororaitchev; 20-04-2018 at 19:03.

  8. #28
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

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    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!
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    • File Type: jpg 1.jpg (94.6 KB, 25 views)
    • File Type: jpg 2.jpg (95.9 KB, 25 views)
    • File Type: jpg 3.jpg (59.1 KB, 22 views)
    • File Type: jpg 4.jpg (92.1 KB, 22 views)
    • File Type: jpg 6.jpg (97.0 KB, 24 views)

  9. #29
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

    Default

    l forget to show you what I did to get that volume!
    I make a filter compartment (for the CW 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 and the bottom/;
    Attached Images Attached Images

  10. #30
    Join Date: Mar 2018

    Location: Sofia- Bułgaria

    Posts: 25
    I'm Georgi.

    Default

    Polyurethane primer before veneering;

    After the measurements, this is are Technical data:
    2- way surround loudspeakers,
    Frequence Range; 33-25000 Hz
    Long term Max Power; 200 W
    Crossover Frequency; 2800 Hz
    Impedance; 4 Ohms
    Sensitivity; 90 db SPL
    Cabinet Volume; 31
    Gross weight / without stand /; 27kg.


    This is the project of the rear speakers, will finish it with "Bird's eye view".
    Attached Images Attached Images
    • File Type: jpg 1.jpg (58.9 KB, 14 views)
    • File Type: jpg 2.jpg (38.4 KB, 13 views)
    • File Type: jpg 3.jpg (70.3 KB, 13 views)

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