I was just reading a thread on AA where someone mentioned that one should rotate bass drivers to prevent the voice coils from sagging. It sounds like a problem for geriatric speakers, but is there any truth to this?
Some of the weighted drivers from VMPS needed to be rotated occasionally. It's the cone that sags not the voice coil. I don't know if they are still around.
It is true that some drivers need to be rotated 180 degrees due to becoming off centered. It has to do with the weight of the driver putting pressure on the surround over a long period of time. This is less likely to happen with smaller lighter drivers than with larger heavier drivers and the surround material has a lot to do with it. For example, a 12" poly cone woofer with an inverted butal surround would most likely benefit from periodic rotation.
If your drivers need to be rotated you should be able to see a difference in the width of the surround by comparing the top to the bottom.
Viridian, The surround on your Klipsch speakers is a continuation of the cone material. Also, the woofer in your speaker dictates the sensitivity of the speaker, so with 102db sensitivity the woofer cone is very light weight. It's not very likely to sag like some of the heavier materials, but if it does you know what to do.
VMPS(still in business)used to weight their sub drivers in the old days and recommended they be rotated occasionally. I don't know of any other manufacturer that did this.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.
