I have a Kef B139 woofer in original box that has a number of problems..i think.
It appears to be in working condition but when looking at the spider, it appears to be sunk in, but the surround and flat cone are even with the frame and would otherwise look like i think it should look like.
Looking at how the spider is mounted. it appears to be correct so I'm curious if this is supposed to be this way?
If i gently press on the back side of the cone until the spider is flat, the flat center of the cone is extended past the edge of the frame quite a bit?
Anyone have knowledge of these??
The other is a slight flaw from when someone cut the box open and scratched the cone pretty good. But that's cosmetic only.
Zc
It appears to be in working condition but when looking at the spider, it appears to be sunk in, but the surround and flat cone are even with the frame and would otherwise look like i think it should look like.
Looking at how the spider is mounted. it appears to be correct so I'm curious if this is supposed to be this way?
If i gently press on the back side of the cone until the spider is flat, the flat center of the cone is extended past the edge of the frame quite a bit?
Anyone have knowledge of these??
The other is a slight flaw from when someone cut the box open and scratched the cone pretty good. But that's cosmetic only.
Zc
Are you able to drive it with a clean sinewave, pick it up with a microphone and compare that to your drive signal to show 2nd order HD?
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