Vancouver, BC
Are you guys using spade connectors to hook up the speakers or soldering wires right onto the leads? If you have exposed leads on the speakers and they happened to get pinched when you are installing them (or bent from the factory during delivery / transport), they can cause a short if the leads gets bent enough to touch the speaker housing. This is exactly what happened to my OEM speaker that caused the voltage regulator chip on the sound board to heat up super hot and eventually blow (physically exploded).
(Topic ID: 144797)
Northfield, MN
