loss of efficiency on one driver
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!
loss of efficiency on one driver
Are there L-pads or other adjustments as part of the speaker's internal crossovers? Frequently their failure or getting dirty is the cause of this type of problem. If you are certain it is the driver, it can be that the phase plug or diaphragm is out of alignment. It is possible that the magnet has lost strength, but I would look at that as the least likely scenario.
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