Sound change because of re-glue

The dust cap on one of the woofers of my ADS L620s was damaged by a kid. I then sent the woofer to the repair shop. The technician had removed the moving parts of the woofer and fixed the dust cap by pushing the dented dust cap from the back. Then, re-glue the moving parts—the surround and the spider—to the frame.

I received the woofer and noticed that the sound of that woofer had changed! I had rotated the balance control between the left and right channels to compare the sound side by side. They were indeed different.

I told the technician, and he insisted that he hadn't changed any parts at all, just re-glued it.

How does this happen? And how do I get the sound back to the way it was?
 
Last edited:
Now that is one way to repair a dust cap… in this case you don’t remove the whole cone and suspension to my knowledge, just remove the dust cap and replace or repair.

In your case only a measurement will help. I’d compare impedance curves first. If the suspension has become different, it should show. Next step is to take acoustic measurements for comparison. That sure will tell differences.
 
  • Like
Reactions: 1 user
The dust cap on one of the woofers of my ADS L620s was damaged by a kid. I then sent the woofer to the repair shop. The technician had removed the moving parts of the woofer and fixed the dust cap by pushing the dented dust cap from the back.
I call it BS or nonsense, pick one.
Do major surgery to solve a silly/minor problem?
I don´t buy it.
Then, re-glue the moving parts—the surround and the spider—to the frame.

I received the woofer and noticed that the sound of that woofer had changed! I had rotated the balance control between the left and right channels to compare the sound side by side. They were indeed different.
Define "different".
How should we know?
I told the technician, and he insisted that he hadn't changed any parts at all, just re-glued it.
He shouldn´t have disemboweled it to begin with.
How does this happen? And how do I get the sound back to the way it was?
Next time get a better Tech.

And we don´t even know what happened; do what Markbakk suggests, measuring is still the state of the art way.

Measure and compare both sides.