My system is based on used JBL LE85, I have a clear difference of efficiency on one channel which is due to the driver, not the electronic upstream. Since these are Alnico drivers, is there any other explanation for the loss of efficience than partial demagnetization?
Also, for the more knowledgeable or better equipped ones out there; if this is due to loss of magnetization, would it result in a significantly different response curve between the drivers? Judging by ear only, I cannot sense a difference in that respect, but then...
Thanks!