One channel of a pair both in December 2015 became open circuit recently.This occurs suddenly and no physical abuse by heavy loud music .
This is traced to corrosion of the coil wire at the glue junction. See the whitish powder . The speaker was subsequently repaired locally
Please see picture.
Has anyone else has similar experience?
Any advice on how to avoid similar fate to the other driver?
I measure 6 R across the terminals for both pair even though the speaker is spec at 8R. Is this usual ?
This is traced to corrosion of the coil wire at the glue junction. See the whitish powder . The speaker was subsequently repaired locally
Please see picture.
Has anyone else has similar experience?
Any advice on how to avoid similar fate to the other driver?
I measure 6 R across the terminals for both pair even though the speaker is spec at 8R. Is this usual ?
6 Ohms is fairly common for an 8 Ohm speaker. Remember you are measuring DC resistance NOT the Impedance of the driver.
Craig
Craig
That glue looks likes its deteriorating (going brown may be oxidation) - perhaps its decomposing and releasing strong organic acids?
I don't see the whitish powder in your photo, but this type of failure has been seen in other drivers. To answer your second question, 6-Ohms DC measured from an 8-Ohm voice coil in a magnetic gap is fairly standard.
PTSD fuel - I had to pull a JX92S (sister to the Eikona) from a transmission line to check the condition of the adhesive. 😆
It looks OK, the dark spot is shiny solder. You'll notice the marks from the tinsels rapping against the cone from the past run-in process.
PTSD fuel - I had to pull a JX92S (sister to the Eikona) from a transmission line to check the condition of the adhesive. 😆
It looks OK, the dark spot is shiny solder. You'll notice the marks from the tinsels rapping against the cone from the past run-in process.
That is the solder joint. Had I moved the driver or got a better camera angle it would have reflected light and appeared shiny silver, which is what it looks like in person.
This is what l suspect. I am rather disappointed by this as this is my first encounter with my most expensive full range speaker .
I suspect the other side may fail soon
