Hi b_limo!
Ferrofluid typically has a very long life span, but some of the older models of speakers are experiencing drying of the ferrofluid because the older formulations do not have the same long term properties of the new generations. That being said, excess heat, long duty cycles at high voltage and dust and grime from decades of use will cause ferrofluid to gel and solidify.
There is hope! The fluid can be replaced and it is not really that difficult to do. Please contact me at [email protected] and I can walk you through the process.
Ferrofluid typically has a very long life span, but some of the older models of speakers are experiencing drying of the ferrofluid because the older formulations do not have the same long term properties of the new generations. That being said, excess heat, long duty cycles at high voltage and dust and grime from decades of use will cause ferrofluid to gel and solidify.
There is hope! The fluid can be replaced and it is not really that difficult to do. Please contact me at [email protected] and I can walk you through the process.