Archive for June, 2013

Subwoofer Voice Coil Failure Modes

Sunday, June 9th, 2013

From the latest batch of reconing:

Three broken subwoofer voice coils

The left two are open — you can see the broken wire at the bottom of the left coil and the top of the middle coil. (As always, click for full-sized image.) The right one is shorted and I haven’t found where.

I find it interesting that these are wound with round wire and the replacements are wound with flat-cross-sectioned copper “ribbon,” to get more current capacity in the same vertical space.