Tannoy - Ferrofluid for 1" tweeters

[mrhackepeter]

Hi there!
Anybode got reliable info about how to replace Ferrofluid in 1" Tannoy Titanium Tweeters (6189 0063) from 2004 (199X-20XX?? i8, V8, etc.) ? Like: how much to apply and where to buy?

There seems to be different viscosity and magnetic propierties..

Thanks!
MH

 

[PSz.]

https://ferrofluid.ferrotec.com/products/ferrofluid-audio/apg-s/apg-s15n/

 

[mrhackepeter]

hey,
I just researched a bit again and it seems the original Tannoy stuff like this:

Tannoy Ferrofluid Syringe 7900 0604 150uL - Speaker Exchange

has the following properties:
150 uL (.15 ml)
921 APG
Gauss 165
Viscosity 200

Did not find 921 APG but 821 APG again from ferrotec:
https://ferrofluid.ferrotec.com/products/ferrofluid-audio/apg-800-series/apg-821/

But the question remains how to get this stuff here in Germany and how to apply the right amount..

I mean there are so many tweeters with this problem so I don´t really get why there is not more activity in this respect..

 

[Mark Tillotson]

Because the owner's high frequecy hearing degrades with age to match the drying out ferrofluid?

 

[PSz.]

If you ask Ferrotec nicely they may send you a sample quantity of the desired product. That may be enough to service several tweeters. I've had an exemplary experience with them.
This stuff will work fine as well.
Ferrofluid 100uL General Purpose for 1" Diameter V.C.