On Jan 9, 12:01*pm, "N_Cook" wrote:
No-one ever told me to be wary if test speaker voice-coil continuity with a
DVM.
Speaker o/c in the amp cab, but after process of removing showed proper
ohmage. Exposed pigtails looked ok and tested ok, so heated up and removed
the dome. Made wire-taps to both voice-coil lead outs and tested each
pigtail in turn.
Both had the same break at about the same point of slowly manually pushing
the cone in and out, so assumed I was deflecting the cone slightly. Very
unlikely the same paint-covered failure at the joins of pigtails to wires ,
or anywhere else, so what was I doing wrong?

Answers here please

From the west side of the pond.

What is o/c in the amp cab? The break could be at the wire junctions
in the soldering process introduced some contamination/corrosive
material. You don't say how old the speaker was, but any corrosion
combined with the repetitive motion could vause a weak spot, THen if
the volume was high, there could be local heating further aiding the
process of failure.