Bass Driver giving Out? Cones and surrounds do weaken in effectiveness, so gradually we don't notice, until we wake up and realize .......
As it happens, yesterday I switched my ElectroVoice 15W 15" woofer on the left side. Made in 1958, happily I had a spare. It is so much more productive than the right side. I used my last new driver, and have 1 cone/coil kit downstairs, so I will re-cone my right side.
Then, I better keep my eye out for spares. I'm not that old. They are too big for my son's wife, but he could make a Man Cave somewhere in his big house, or I'm sure my friend with my prior JSE Infinite Slope Model II's will want them, he loves both, and has the room.
It's a problem moving our great stuff to the next generation, I always thought they would fight over it!