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A DIY Ribbon Speaker of a different Kind
A DIY Ribbon Speaker of a different Kind
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Old 23rd July 2017, 05:31 PM   #1091
cassini67 is offline cassini67  Austria
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Hi, I think I build one, therefore a few questions.
How many magnets do I need for a page.
Can one build a coil of round wire?
What air gap you choose
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Old 24th July 2017, 06:43 AM   #1092
cassini67 is offline cassini67  Austria
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Hallo, ich glaube ich baue ein, also ein paar Fragen.
Wie viele Magnete brauche ich für eine Seite.
Kann man eine Spule von Runddraht bauen?
Welche Luftspalte wählen Sie
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Old 24th July 2017, 07:37 AM   #1093
sergiu2009 is offline sergiu2009  Romania
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Quote:
Originally Posted by WrineX View Post
Nice !!! All satin black never fails. Yeah I probable have years to come for redoing some of the designs I mean some sucked , did not need a mic to be sure

And some sounded really good , but I don't trust my ears , I know how I can influace my brain so a mic is a must
Here it is my friend,
My diy ruba, preassembled and ready for the final paint. I used a pair of old refurbished 8inch sealed speakers for bass. They are possitionned on the floor and not so sensitive (you can see how far the rubas are positioned in the back). The real 15inch bass speakers that i want to use are positioned on the right, on the table.
I can confirm now that these speakers, assembled like this (with deflection plastic exterior frame) are on a whole different level of sound reproduction with staggering presence, effortless and very appealing mids, very good hights , very good horisontal dispersion but poor vertical dispersion. That's why it is needed a least a 50cm ruba or bigger or stacked to cover all the room.
Coupled with the right amp (the Hiraga 30watter modified in my case) they sing like nothing you ever heard. It took me so much time to find my suited version because i didnt use the original magnets and steel so i had to make it work best for what i had and on top of that i had to make them sensitive enought for 10w amps.
For example i have the old 1969 jlh amp for measuring tests and tested this amp yesterday to see if i had enough dB for small amps ( because my mic isnt calibrated for accurate dB measurement) and the result was as expected, at half volume i can barelly hear my wife at 50cm. So plenty of dB for my future projects (ex: hiraga nemesis compensee, pass de-lite, Macura power mosfet folower)....
The plastic frame makes the sound more concentraded so for example on the tests when you sit in front of them (perpendicullar on axis) you had a huge sweet spot like about 90degree (way bigger than regullar tweeters, ex: 45degrees left and 45degree right) but when moving to the edges, like the rest of the 45 degrees so near 180 degree left and 0 degree right the hights diminishes and the mids also. Now you dont have this problem anymore and the verticall dispersion has improved. Now i understand why Audionec uses such a big wood frame: to improve the 3d imaging and to mask this effect. Clever ideea!!!
Now, i will explain an aspect, because some friends here on diy asked me: you didnt found my vids from youtube on search because, FROM RESPECT, to the inventor, Lineaum, Francois D. And AudioNec i made them private and you can only see them only if you acces them from the diyaudio site. I invested allot of time and money and dont want to share all the pics and detailed vids to some replica retailers from china. If you want to make one you should read the last 40 pages from the thread to at least understand what i did and why i did it.
Cheers
Sergiu

Ps: Wrine, my friend, how are you? I havent seen you latelly...
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Old 24th July 2017, 07:56 AM   #1094
sergiu2009 is offline sergiu2009  Romania
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Quote:
Originally Posted by cassini67 View Post
Hi, I think I build one, therefore a few questions.
How many magnets do I need for a page.
26 pcs per channel and 52 for stereo.
Can one build a coil of round wire?
Yup.

What air gap you choose
3 or 4 mm ( it depends on your magnets and steel).

Cassini67 you dont have to be so insistent (ask the same thing in deutch, or post three times the same thing). I now have a very little time to answer because of the job, familly, hobby so please be patient. I will answer you questions but you have to be patient with me.
Cheers
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Old 24th July 2017, 05:59 PM   #1095
cassini67 is offline cassini67  Austria
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sorry, bin neu im forum und noch etwas unbeholfen. wollte nicht 3x posten.
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Old 1st September 2017, 11:28 PM   #1096
Asafb is offline Asafb
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Join Date: Mar 2016
Default amp vs xmax

Hey
I started to simulate the core.
I use the N52 magnet and the 1020 iron.
i need to choose between a higher amplitude vs a wider width (which is the XMAX?)
Xmax = 5.6mm ; B = 1.74T vsXmax = 0.35mm; B = 1.84T
What do you think?

thank u
asaf

test12.png

test10.png
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Old 16th September 2017, 02:37 PM   #1097
WrineX is offline WrineX  Netherlands
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Hi guys! been away for some time but Looking good serg !! they really do !! good work !

I for that mater skipped the ruba for now....... but you never know

i got to many projects that should be finished in the next 3000 years but even that is pushing it i think haha. im so slow and switch projects allot
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