Hello guys. I was working with a DIY earbud using drivers from my old KZ ZS3. It was fine at first, but not sure why, one of the driver suddenly doesn't produce any sound. I have checked the connection on each end, and tested the cable with different drivers and it's working properly. But when I tested the driver itself using multimeter, I get a lower ohm reading, about 0.5-1 Ohm, whereas the properly functioning ZS3 driver and other drivers that I have would make around 18-22 Ohm. I know that if a driver's vocal coil is broken, it won't produce any sound but there's no impedance at all unlike this one. What is the diagnosis for this case? And is it fixable?