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KEF 104/2 tweeters

Good afternoon everyone. I just picked up a pair of KEF 104/2 speakers on CL. They are fully functional and I currently have them integrated in my system (Parasound Halo preamp and Nakamichi PA-5 amp).  I am concerned about the tweeters (one is slightly dented) and the ferrofluid. I've read some DIY fluid advice and am contemplating doing the work.  However, I've also heard that these tweeters are not top quality.  I've considered replacing them all together with Morel MTD 30s buy I can't seem to find any.  I would like to find a direct fit so I don't have to retro fit anything. Not sure about other available tweeters.... Also, do you believe it's worth while to do the surrounds while I have it pulled apart. Or any other suggestions for how to rehab them?? Thank you much! 

icarus12
teo_audio
2,197 posts
 
If you have to take them apart, flip the bottom for the top woofer after the foam refit..., as this will give the natural over time sag of the drivers -- a chance to relax in the opposite position.

the in situ position of the woofers is bad for them (horizontal up and horizontal down), and.....over time, they tend to sag..so flipping them top for bottom when refoaming... is the remedy.

I don’t know if this can be done with the 104/2 woofers, but it should be done if at all possible.
icarus12 OP
24 posts
 
Thank you all. I appreciate the feedback.  I did check out one video on changing out the ferrofluid but it didn't recommend what type of ferrofluid to use as replacement nor did it state how much to add??? Perhaps it's obvious when I get it apart. 
ljgerens
157 posts
 
The ferrofluid is available from Parts Express. It doesn't take much. The ferrofluid comes in little tubes for different size tweeters. Each tube is enough for one tweeter. You need 2 tubes for 1 inch tweeters. They are about $6 each.
icarus12 OP
24 posts
 
Terrific advice from everyone. I plan to change out the ferrofluid this weekend. Just inspected my surrounds and they are, in fact, the rubber type that must have come in the earlier non-biamped model.  The center donuts look decent as well. Thanks to all of you for helping 
icarus12 OP
24 posts
 
Hi there.  I completed the ferrofluid replacement on both KEF 104/2 speakers based on your suggestions. Thank you.  Now... My right speaker is playing in a very muddy and muted way.  I thought I had noted it prior to the fluid change and had hoped that would remedy the issue but still there is a noticeable audible issue with vocals especially and overall output from the right speaker. All of the surrounds are intact (rubber) as are the donuts.  I swapped them temporarily to another set of speakers to make sure the issue wasn't elsewhere (amp, cables etc) but it's fine with other speakers. Could this be an issue with the caps?  I havent opened up the case around the mids to check them out.  Much obliged! 
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