OK - i know that if you push (gently) on the interior of the cone and you feel/hear a crunch/squish it's a good indication of a blown speaker, THAT does not happen. What also doesn't happen is the speaker reacting in any way to a toner put on the terminals AND a 'zero' reading when attempting to read the ohmage with a multimeter!!!! The speaker is completetly dead with no indication of damage whatsoever. It was bought with a cabinet brand new 3 years ago. It was wired for 4/8/16 ohm per the input selector. Marshall type. One day the ouput of the cabinet changes in mid-song drastically - i was running two amps at 8 ohms apiece into either side. I opened up the cab and started tetsing each speaker with a meter and a toner individually and this is where I'm at. Three speakers that test fine audibly and per meter reading (15-16 ohms) and one dead. #1 - what's the problem? #2 - can it be fixed? #3 - is it worth it?