Just a quick note on the topic of Ferrofluids. There appears to be quite a bit of discussion over the years on what type of Ferrofluid should be used in what type of driver. With literally thousands of audio drivers being released into the market since Ferrofluid was first introduced as a feature of loudspeakers in 1973 (!) there is no overarching guideline that covers every manufacturer / driver.
There is however, one source of information that provides a basic summary of why type of Ferrofluid / in what kind of driver. It mostly breaks down to density of the suspended fero' particles and viscosity of the liquid substrate which holds said particles suspended, with a dash of importance put upon the ester which coats the metallic particles, keeping them from clumping together.
Here is the chart:
https://ferrofluid.ferrotec.com/products/ferrofluid-audio
Right from the proverbial horse's mouth, so to speak: one of the world's largest manufacturers of Ferrofluid, in operation since the early 1970's. If these folks don't know what they are talking about, I don't know who would...
Also, if you want to get ((really)) geeky in the subject of Ferrofluids, you can't go wrong by spending some time with this document:
https://pubs.acs.org/doi/10.1021/acsomega.1c05631#
Andrew Drouin
www.SpeakerFerrofluids.com
There is however, one source of information that provides a basic summary of why type of Ferrofluid / in what kind of driver. It mostly breaks down to density of the suspended fero' particles and viscosity of the liquid substrate which holds said particles suspended, with a dash of importance put upon the ester which coats the metallic particles, keeping them from clumping together.
Here is the chart:
https://ferrofluid.ferrotec.com/products/ferrofluid-audio
Right from the proverbial horse's mouth, so to speak: one of the world's largest manufacturers of Ferrofluid, in operation since the early 1970's. If these folks don't know what they are talking about, I don't know who would...
Also, if you want to get ((really)) geeky in the subject of Ferrofluids, you can't go wrong by spending some time with this document:
https://pubs.acs.org/doi/10.1021/acsomega.1c05631#
Andrew Drouin
www.SpeakerFerrofluids.com
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