Jogi48
07-17-2008, 12:56 PM
Hi everybody,
I'm absolutely new to this nice forum, and my first post is a question, as you might see;)
I have a nice horn system on loan with a JBL 2470 with phenolic diaphragm, which is my first horn speaker in my livingroom btw.
Sounds great, or better, sounded great....
When the owner and myself set up the whole thing, we noticed slight distortions from one channel especially with piano music.
So out went the diaphragm, and according to an advice from another horn owner we sanded off a tiny bit of the aluminium ring of the coil.
After this the distortion was gone:applaud:
And the music with it :banghead:
When I measured the coil directly at the diaphragm, it turned out to be dead, no resistance at all.
So the question is: are those diaphragms known for sudden death, or did the sanding hurt something, although it was really almost nothing?
And is it maybe possible to repair?
Putting in a new voice coil should be possible with the right tools, does anyone know if someone ist offering such kind of service?
If there is no chance to bring it back to live, my friend must swallow the toad, as we say in German, and get a new one somewhere, which is not easy as well.
Thanks in advance for any idea!
Best regards from Germany,
Juergen
p.S.: Horns seem to be quite infectious, as I find myself already watching out for those beasts....
I'm absolutely new to this nice forum, and my first post is a question, as you might see;)
I have a nice horn system on loan with a JBL 2470 with phenolic diaphragm, which is my first horn speaker in my livingroom btw.
Sounds great, or better, sounded great....
When the owner and myself set up the whole thing, we noticed slight distortions from one channel especially with piano music.
So out went the diaphragm, and according to an advice from another horn owner we sanded off a tiny bit of the aluminium ring of the coil.
After this the distortion was gone:applaud:
And the music with it :banghead:
When I measured the coil directly at the diaphragm, it turned out to be dead, no resistance at all.
So the question is: are those diaphragms known for sudden death, or did the sanding hurt something, although it was really almost nothing?
And is it maybe possible to repair?
Putting in a new voice coil should be possible with the right tools, does anyone know if someone ist offering such kind of service?
If there is no chance to bring it back to live, my friend must swallow the toad, as we say in German, and get a new one somewhere, which is not easy as well.
Thanks in advance for any idea!
Best regards from Germany,
Juergen
p.S.: Horns seem to be quite infectious, as I find myself already watching out for those beasts....