Where to buy ferrofluid ?

I bought some ferrofluid from this place;
https://www.teachersource.com/catalog/page/Electricity_Magnetism_Engines/Ferrofluids/

FF-310

I've been modding drivers and this stuff is not
the same stuff used in speakers, I've been doing
experiments and this stuff dries out. Sanity
check, I opened up my EV compression driver that
I installed ferrofluid 10 years ago and it's still
liquid and redish in color. Where do I get this
stuff from?
 
thylantyr said:
I bought some ferrofluid from this place;
https://www.teachersource.com/catalog/page/Electricity_Magnetism_Engines/Ferrofluids/

FF-310

I've been modding drivers and this stuff is not
the same stuff used in speakers, I've been doing
experiments and this stuff dries out. Sanity
check, I opened up my EV compression driver that
I installed ferrofluid 10 years ago and it's still
liquid and redish in color. Where do I get this
stuff from?

The other thing about the "educational" ferrofluid is that the fluid in this pack has a viscosity rating that is way too high for speaker use. Even just a little of it damps the driver way too much and linear distortion skyrockets.

As far as I can tell, there's no way to buy the stuff unless you're a driver manufacturer. As benny points out, the stuff is ridiculously expensive, and I don't think they are going to sell anyone a tiny $20 bottle's worth.
 
thylantyr said:
I used the Ferrotec EFH1 and vicosity is fine for my midrange mod.
I don't notice any audible difference when I applied it, the only
issue was it dries up. I'm working on plan B. using this stuff mix
with another liquid that doesnt' dry up ;)

I used it in a tweeter once. Just a little bit turned the impedence into a flat line. I suppose it might work ok in some instances, as long as it's used far above the Fs. Did you take any before and after impedence curves?


BassAwdyO said:
What is ferrofluid made from anyhow? It seems to me it would probably be some sort of oil that has iron dust dissolved into it.
Anyone know?

This is a complete guess, but I suspect it's somehow bonded at a molecular level, or otherwise it would seperate.
 

thylantyr

Member
2001-02-19 10:38 pm
Mars
Impedance curves are not important in my case.

Ferrotec EFH1 is what I have, doesn't work.

Ferrotec makes the audio grade fluid if I can find a dealer - rofl

For now I'm doing 50/50 oil tests. Mixing oil with EFH1 and modding
4 midrange drivers and let the games begin. Only time will tell.
I'm testing 4 different oils..
 
Here is a Ferrotech advert...
 

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