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?