Ferrofluid


Hey guys. So I have been texting someone from Germany I met online as he also has a pair of B&W 800 Matrix speakers. He mentioned that he treats his tweeters every so many years with Ferro fluid. It was kinda hard to actually text about it online with someone I just met from another county. I did google it and looked on utube for some videos and there are some. It’s seems it should be done about every 10 years or so. And u actually have to take the tweeter out of the cabinet disassemble / remove the voice coil clean out the old Ferro fluid and add new Ferro fluid. It’s seems to be some kind of a magnetic liquid used in speakers especially tweeters for better clearer sound, highs, voices etc. It really looks like a job for the experienced in rebuilding speakers. Has anyone heard of this or had it done ? I’d really love to know from folks who had experience with this. My speakers are from the 90s and even though they still sound phenomenal I’d really like to know more about this. I do plan on keeping my speakers for the long term. Thanks to all in advance. 

128x128Ag insider logo xs@2xtattooedtrackman

There’s nothing inaccurate about a cheap meter, they are all good. I see no relays in that crossover ( or any other crossover ) and diodes generally don’t go bad.

a meter would confirm to op that all caps are good and I bet they are as they used quality components.

I wouldn’t change a thing about the crossovers and I think that is good advice.

Personally, I would not spend a nickel on those crossovers , I’d triamp them but then I have an active crossover sitting in a drawer and the amps to run it, I would not recommend this route to OP.

No difference in meter accuracy? You would triamp passive crossovers?

doing nothing is not bad advice, these are nice speakers. 

Also, a trusted ferrofluid might cost $30 to $35.  If you feel that yours is drying up and you don't want just remove ferrofluid, this is still a good option. 

Hi Mike, we'll, I've tried to get ahold of you. Audiogon blocks personal information sharing, I believe that it is to stop sales and transactions outside of Audiogon. I realize that I was just helping you with an issue and you certainly had no ill intent. Overall, it would  be nice if Audiogon created a form or something to share personal info when no one is trying to profit.

I don’t want to spin this into a Triamp thread but when I say triamp, I said use an active crossover , not passive .

You can call me a hypocrite as I have my energy 2.8’s passively triamped but I plead innocence as :

1) the manual says don’t use an active crossover with them.

2) I have three NAD 208 amps, might as well use them, right?