Dear all,
few days ago I purchased second hand a pair of JBL L250. I really think they are simply fantastic and I am super excited about the way they sound in my setup.
I am trying to collect any kind of document about them, especially schematics, that could help me understanding if there is any electronic component that I should check and replace.
Suggestions and any kind of information are very welcome!
Thank you in advance
Gaetano
few days ago I purchased second hand a pair of JBL L250. I really think they are simply fantastic and I am super excited about the way they sound in my setup.
I am trying to collect any kind of document about them, especially schematics, that could help me understanding if there is any electronic component that I should check and replace.
Suggestions and any kind of information are very welcome!
Thank you in advance
Gaetano
Here is some xover-things
https://www.audioheritage.org/vbull...250-crossover-upgrade-to-250Ti-specifications
And my own 4 way passive 155 kg each XXL JBL 250ti project.
regards John
https://www.audioheritage.org/vbull...250-crossover-upgrade-to-250Ti-specifications
And my own 4 way passive 155 kg each XXL JBL 250ti project.
regards John
Attachments
I'd advice you to register on Audioheritage.org, that where you will find the most information, and some of it not publicly viewable without the membership.
https://www.audioheritage.org/vbulletin/showthread.php?4556-L250
https://www.audioheritage.org/html/profiles/jbl/l250.htm
https://audio-heritage.jp/JBL/speaker/l250wx.html
https://www.google.com/search?q=JBL...HTIOCDgQrQIoBHoECBcQBQ&biw=1920&bih=879&dpr=1
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Wow! They look very interesting. What are those big spheres right in the middle for?
Oh, well, looks like it is too late for me to register :-(I am administrator there and we cannot add new members at this time.
Rob
It´s a massive build "bigger" copy of the JBL Bi-radial 2344a horn´s, but i made them go spheric.
Weight 25 kilos each without driver with sandwich construction at mounting plate for driver (3 layers with acoustic glue between), so no vibrations there
Greg Timbers, former JBL/Harman Chief Development Engineer, was one of the designers of the L250.
Greg mentioned the advantages of the asymmetrical L250 in his video interview with Erin's audio corner (highly recommend watching the whole interview if you are a fan of JBL).
He removed the drivers from his personal Everest speakers and made his own L250 style enclosure, see pic.
Thought it was a fun fact considering all the famous loudspeakers Greg Timbers designed, L250 clearly left a lasting impression on him.
Greg mentioned the advantages of the asymmetrical L250 in his video interview with Erin's audio corner (highly recommend watching the whole interview if you are a fan of JBL).
He removed the drivers from his personal Everest speakers and made his own L250 style enclosure, see pic.
Thought it was a fun fact considering all the famous loudspeakers Greg Timbers designed, L250 clearly left a lasting impression on him.
Attachments
Yes, but a little bigger one
Here is the JBL 2404h and mine to get an idea of size.
Regards John
I have to correct you. The depicted ones are the butttitties horn. An original Swedish invention.A 'copy' of JBL 'buttcheek' horns
Cheers!
Just scaling everything up.
What is that?
Often called that.
2344/2342 Bi-Radial horns used in the 4425/30/35 and 3678, and maby someone more
Regards John