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Ferrofluid tweeter

I recently purchased a pair of B&W P5 speakers that were made in 1997. After making sure all the old ferrofluid was removed entirely, it was time to add the magic. While adding the ferrofluid, I purposely put 60ul into on tweeter and 100ul into the other. One thing for sure, it made a huge difference in voice clarity, no more muffled sounds coming from the tweeters.

There is a slight difference between the tweeters because of the different amounts of ferrofluid used. The tweeter with 60ul is a little brighter than the 100ul, but can’t decide which one I like better. Once I decide which one to go with, I’ll even the two tweeters so they will match in sound.

Has anyone used less than the required amount of ferrofluid in a tweeter, and would there be any harm in doing so?

The tweeters I have are 1 inch and require 100ul.



prestons

Showing 1 response by timlub

timlub
1,649 posts
 
I also recommend that you use the proper amount of ferrofluid.  Tweeters are designed with or without it for a reason.
Ferrofluid has consequences of good and bad, that's why its important to use as designed.
Ferrofluid does help absorb heat, so it does help with power handling. Ferrofluid also adds resistance to coil movement, so it changes QMS.  Too high or too low and you will be dealing with a peak or dip. So you can see here why one would be brighter.
Overall, If you don't overpower your tweeter, It should live, but my experience is that manufacturers use ferrofluid for a reason.
Focal uses it when necessary.  Seas doesn't use it (at least that I've seen) If your careful, you should be fine.
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