Hi all. I know nothing about hifi, I just listen. I bought a pair of JVC Zero 4 speakers around 1977. They were carefully selected after listening to about 50 others in the acoustic room of a major department store and cost me two months wages. I don't know if my ears have just become attuned to them, but they have had to be substituted for the ones that come with every sound system I've had over the past forty years - nothing else sounded nearly as good. Anyway, of late, the base cones have started to crackle alarmingly and I can no longer listen to music, except on a tranny in the kitchen. Does anyone know if I can get the base cones rebuilt (as they were) and, if so, where?