Kef Reference Tweeters-Ferrofluid Replacement

My speakers are Reference Series Model Ones. I bought them from a consignment shop in pristine condition knowing they might need the ferrofluid replaced.

I was elated to hear they they sounded great when I hooked them up. It didn’t take long before the left speaker lost definition. I figured no big deal, I will replace the fluid. All went as planned except there was no sound whatsoever when I went to test the “repaired” tweeter. After checking impedance (which I should have done before the repair), I got nothing. I do not know if I damaged the fine wires connecting the voice coil while cleaning it or if they blew prior to the repair.

As of now, there is no continuity between the leads of the tweeter. Also after rebuilding the tweeters, the VC/dome has completely separated from the speaker and floats free, levitated by the ferrofluid.

I purchased replacement domes off eBay and will now need to learn how to install them. Any tips on glue type to secure the diaphragms?

 Tiny touchy stuff, those tweeter wires. Broke one once, and was able to make just enough slack for solder. It was a miracle that it worked the first time.

 Ferrofluid is added to the voice coil gap in order to damp the tweeter cone itself, not to lubricate it. And yes, it dries up whether the tweeter is used or not. Same as electrolytic capacitors that are stored for years are not quite the same as they were coming off the line.

Skid, I'm not sure about the glue.  Ask the folk's your buying the new pieces from....and good luck!  Let us know how it works out.

Hi Lou, thank you so much for the instructions specific to the SP1353 tweeter. The pictures helped a lot. Thx -Stefano

Stefano, my pleasure!  Hope it worked out okay for you!

Lou