pbandstefanwich
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- Jan 9, 2010
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A splice job would be possible, but I think it would be extremely difficult. You'd have to be very very good at micro soldering to make it work. It is possible to unwind another loop from the voice coil, but you have to be very careful with it. I believe the wires go in opposite directions (at least they have on the drivers I've played with), and make sure to unwind only a little bit less than one turn. From what I've found, when you're unwinding the wires and get back to the place the originally started from, the wire is stuck much more securely and will snap under the force required to pull off more loops. Make sure you're very delicate while unwinding it too, because the wire can split while unwinding it, or pull off part of another coil underneath it. It's hard to do right, and should definitely be a last resort. The varnish/glue holding your voice coil together might be more fragile than a new one given the age, so that would work in your favor.
I would definitely check the resistance across the two tabs first, though. If you get a reading around 32 ohms I think it's safe to say the whole voice coil assembly is fine. Your first task after you verify that should be to reattach the coil to the diaphragm. After that you should secure the diaphragm to the plastic base. I wouldn't use super glue at first just in case you have to take it off again to do further repair. You can always put some more permanent glue on later if you want. Hopefully all you'll have to do is glue everything together and it'll work again!
Edit: when you are checking the resistance, make sure your multimeter isn't connected to anything when you turn it on. I know that, at least with my DMM, if I have it connected to a resistor when I turn it on it doesn't measure the correct resistance. Not sure if that applies to all multimeters, but just something to keep in mind.
I would definitely check the resistance across the two tabs first, though. If you get a reading around 32 ohms I think it's safe to say the whole voice coil assembly is fine. Your first task after you verify that should be to reattach the coil to the diaphragm. After that you should secure the diaphragm to the plastic base. I wouldn't use super glue at first just in case you have to take it off again to do further repair. You can always put some more permanent glue on later if you want. Hopefully all you'll have to do is glue everything together and it'll work again!
Edit: when you are checking the resistance, make sure your multimeter isn't connected to anything when you turn it on. I know that, at least with my DMM, if I have it connected to a resistor when I turn it on it doesn't measure the correct resistance. Not sure if that applies to all multimeters, but just something to keep in mind.