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.
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.
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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? |
Hi @katman well, I do agree that in a perfect world, active crossovers are always better than passive crossovers. There are a few scenarios where they are not, I’ll give you one quick example. When designing a speaker, I always use the crossover slopes that will achieve the best alignment more the given drivers that I am using. I have taken drivers and used Linkwitz 12 or 24 and just could not get rid of a hump or a dip or maybe achieve a good phase response, Switch to Butterworth 6/12/18, same, switch to Bessel or Chebechev... yada yada. It can take alot of work to get the best out of a crossover design. I have yet to see a electronic that give the flexibility to change apc/cpc slope types and rolloff. I believe that there are several threads here that tackle the subject. If you don't find them, you could easily start that thread. Again, if all the stars fall into alignment, electronic crossovers are definitely better. I hope this helps. Tim |
No, won’t start another thread. My thought was , if you have a quality, well designed speaker , going to active bi/tri amping is more likely to improve things that than trying to “improve “ the crossover which isn’t likely to improve anything . Most likely, in this situation , best thing to do is nothing . One way to make those speakers sound better is to temporarily hook up an old avr with room correction , turn off all tone controls and try to get freq response flat ( +\- ) by changing speaker location, angle and adding /removing room conditions . Then, get rid of that avr. |
tattooedtrackman Thanks for a great post-question here I also have the Matrix 800s speakers and love the sound. I looked into replacing the ferrofluid some time ago. Contacted B@W North America they would not do the work here in the states. They wanted me to ship them back to England i passed.I remembering that they told me that there is only one type of ferrofluid to use in the Matrix 800 speakers and any other would cause damage to the tweeter. What the specific brand or type is i do not remember. tattooedtrackman Please keep us posted with your journey. timlub thanks for all your great info. Where are you located? |
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