Home » Audio » Speaker » JBL G-730 Diaphragm quest
JBL G-730 Diaphragm quest [message #15539] Tue, 24 July 2007 12:32 Go to next message
xnay is currently offline  xnay
Messages: 2
Registered: May 2009
Esquire
What does a bad mid-range driver diaphragm sound like?? Is there hissing, cracking, buzzing, etc.?? It seems the voice just doesn't seem as clear as it should, like it's drowning. Was hoping to get a little feedback before investing $$$ for new ones. Thanks in advance

Re: JBL G-730 Diaphragm quest [message #15540 is a reply to message #15539] Wed, 25 July 2007 09:48 Go to previous messageGo to next message
Wayne Parham is currently online  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

One of the most common symptoms of a blown driver is buzzing. This happens when the voice coil begins to unwind from heat weakening the adhesive that holds it to the former. It then rubs on the pole piece. This can make it buzz or sound fuzzy or scratchy. Another thing that can happen is a tear of the surround or damage to the diaphragm itself. This is usually caused by overexcursion or contact with the phase plug (in a compression driver) or foreign debris. This will usually sound lower in volume and different in tonal character, sometimes buzzing as well.


Re: JBL G-730 Diaphragm quest [message #15541 is a reply to message #15540] Fri, 27 July 2007 11:40 Go to previous message
xnay is currently offline  xnay
Messages: 2
Registered: May 2009
Esquire
Thank you Wayne, for elaborating in such detail. Your reply is very clear and informative. I learned much.

Robert

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