KEF T33 Tweeter Ferrofluid Replacement
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- Опубликовано: 11 мар 2018
- texasound.blogspot.com/p/speak...
We offer a complete speaker repair and restoration service. Our specialty is vintage speaker restoration and the reversal of all age related issues. We can even restore your vintage speakers' performance to as good as new. Just take a look at some of our videos and the before and after shots of our work to see the results for yourself.
We are situated in Austin Texas.
Located in North Austin near Burnet, and West Koenig.
We meet by appointment, and can be reached
By phone: 512-769-9750
By email: texasound@gmail.com 
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just bought a pair of meridian m20's with these tweeters. this is exactly what i needed.
Great information about ferrofluid tweeters!
I successfully performed this procedure on both of my KEF 103.3 tweeters today. Thanks for this. ✌️
What did you notice when listening to them as a result of your work?
@@NomadBDP they’re still working, so mainly that. They are likely to fail and die if the fluid isn’t replaced after 30+ years. I love these speakers. They’re the best I’ve ever owned and perfect for my space.
How many drops of ferro fluid did you use? A few drops or do you fill the crevis to the brim?
@@finedayforlessugar I bought and used the premeasured applicators from Simply Speakers. Trying to fill from a larger tube is imperfect at best, because it's hard to know when to stop filling.
Excellent!
very good work, sir
Just the video i need are the wharfedale dovedale 3 tweeters a similar affair,im loving this hobby always something to learn.Subscribed !
Thanks so much for the video, really informative. I need to replace the tweeter dome on my B&W DM601S1. What type of glue can I use to affix the replacement tweeter dome on the plastic, once the old dome has been ripped off, and the area cleaned? Any tips on how to properly center the new dome before glueing? Thanks
Very good video 👏, should I be worried about if I buy second hand speakers ? Around 15 years old BW 602 S3 , they have dome tweeter
Hello, I was watching your video again for the 5th time (it’s a good reference what can I say?) and this question came to me. Would it matter having too much ferrofluid in the tweeter, how do we know when enough is enough?
I’m sure we won’t be adding the exact amount that KEF had calculated but maybe there’s a way to come close enough?
Thank you
Mind blown 🤯
What about replacing the dampening foam behind the tweeter dome? Any recommendations? The foam on my JBL tweeters have turned to dust.
Hi can you repair focal t120ti tweeters probably need new coils. Thankyou
What's that foam under the tweeter? Does it need to be replaced?
Thanks
thanks for the video...2 questions...1/ where do I get the blotter paper, never heard of it....2/ do you know if the vintage spendor sp100 has ferro fluid on both the tweeter and midrange drivers?
I disassembled my dynaudio T-330D esotar tweeters and the problem was the foam stuff that was rot and disintegrated at the least touch. The sound of my TAOC-FC-3000 loudspeakers recovered the sound for what they should being known when their retail price in 2004 was of 7.000 euros. Quite expensive. Sometimes, when a great piece of hi-end electronic gear sound is deceptive is because something goes wrong. I told Dynaudio about this. Dou you know this, in their new flagship tweeters, they use a completely different way to tame the back wave from the dome inside by the use of a plastic perforated dome behind the actual tweeter textile dome. Something that don't get old like a foam. I can't help but think about all those 330D tweeter owners who likely don't know that their loudspeakers are working way way below their potential. A pity.
Thanks. Useful and unique videos. I bought a pair of Kef Concord IIIs. Tweeters do not work at all; no sound (tried various wiring and amps). Seller ripped me. (Couldn't sound test due to covid restrictions). Should I follow this process for the tweeters? If it doesn't work then the cost of professional services for crossover fixes etc. here will be 3/4 times what the speakers cost (not including parts). So, thinking of selling for parts. Shame, as a classic speaker and not many around. I have ordered ferrofluid and I do know how to solder etc.
Did you solve it in the end?
Thanks. I'll have to attempt to do this on a pair of Vifa. Can I use methyl hydrate in place of rubbing alcohol?
Great work! Have you ever done any KEF NT25 tweeters?
No
I have some Tweeters from my B&W CM-4 Speakers. I needed to replace the tweeter domes with voice coil. That nasty brown Ferro Fluid is no fun to clean up. My question is: How full do you fill the slot the tweeter magnet that the voice coil rests in? I imagine you can't fill it to the top since the voice coil will displace some of the area. I have some KEF's 105 Series 3 that I was told would be a good idea to replace the fluid. The Tweeters play fine. I would have thought if the Ferro-fluid had become solidified like owners are saying, they wouldn't put out any sound? True/false? Thanks for any help.
I'm working with a paradigm cc-350 center speaker. I was playing the stereo very loud today and smoke came out from the center speaker. I noticed the center speaker voice coil became detached from the rubber sponge. When removing the voice coil from the magnet I didn't know anything about ferrofluid. My question is does it matter which way the voice coil sits on the magnet? It seems that it can sit on the magnet two different ways. Does that really matter? Or just as long as the wires are hooked up correctly positive and negative I'll be ok. When I put the speaker back together I get no noise from the Tweeter unless I push in the voice coil. Is it possible for a tweeter voicecoil to smoke? Or did the smoke come from the circuit board in the speaker. Thank you, great video. I will be following you.
Yes tweets can smoke
This is SO good of you to produce these videos..... MUCH APPRECIATED. I have had a pair of 107.2s for about 10 years now and really like them but I'm sure I need to replace the woofer surrounds. I think the tweeters and midranges sound really nice but I have no idea whether or not I should try and replace the capacitors. How can I tell if I should? Do you sell those and if so how expensive are they? Thank you
Old speakers=Old caps, what do you think? We get Kef crossovers sent to us from all over the country texasound@gmail.com 512-769-9750. Rock On.
@@texasound1 How do I get to the crossovers and what does it cost to do this? Thank you
@@crissignori7482 learn more or you'll destroy them
@@sellsubz Thanks .... I most certainly have
@@crissignori7482 learnt more or destroyed them?
I just got a pair of Bose 601 IV New in box from 2002 and they where stored in a climate controlled room. Should the ferrofluid in the tweets be ok?
Nice work. How do you know when you have enough ferrofluid in the gap? I saw another video where it looked like it was nearly overflowing. It looks like you left a minor gap at the top.
If you fill the gap what will happen when you put the voice coil in? Think about it!
Exactly my thought, hence why I was trying to figure out how far you fill it. I definitely don't want it to overflow when I place the voice coil back in.
Sounds like he does it by feel since he offered nothing concrete. Obviously the coil will displace some fluid and maybe the max level,isn't critical but a rule of thumb would have been helpful especially silence he didn't show it. This was my question also. Too kuch would likely restrict vc movement
Great video
My KEF 104/2 recently both tweeters are stop working, do you think Ferrofluid will bring them back to life? I checked them with the voltmeter they are all read as 115M or less than one ohm some time. Dont you think they are all dead can't recover.
Coils are shorted. look online for replacement diaphragms.
i was wondering.... what if i cleaned out all the old ferrofluid tweeters and put it back together with no fluid. i have some polk speakers that i dont play loudl at all. will this dry voice coil gap kill my tweeters?
Not at moderate volume but FF also damps dome/vc motion so there will likely be sonic repercussions
This is very informative. Does the fluid go bad with age or with heat and usage? I have a pair of Kef IQ3's that I purchased in 2010 but have only used them for two years.
Both. I did a B&O tweeter the other day, the FF was so thick there was almost no output from the tweeter
Considering the T33 can take 5ml/5cc of alcohol before it overflows and that the gap shall be filled to 75%, I calculate each tweeter can take 3.75ml of Ferrofluid. But it looks way more than the small container we see in that video.
How do you know it can take 5ml of liquid? Did you fill to test? I'm only asking because I have some Mission 731i tweeters that are in need of new ferrofluid. I've cleaned the gap, and I'm just waiting on the ferrofluid to arrive.
Infinity 902-6682 polyspherite tweeter Hi, how do I know if the tweeters of my speakers need ferrofluid?
The tweeters looks similar to yours but I’ve checked mine and there is no ferrofluid inside, is completely clean, it seem like it was never there.
The speakers are the “Infinity sm125” and the tweeter are is called “Infinity 902-6682 polyspherite tweeter”
Thanks in advance !
The absence of a ferrofluid speaks of a good design - reputable companies have the most prestigious tweeters that are always dry (since ferrofluid kills the microdynamics a little).
@@genaishivatov1737 ah, no... Some of the highest end in the world use FF
@@barneyrubble4827 Maybe only Dynaudio - who believes that it is better to win in power, losing a little in microdynamics.
What are you using for 'blotting paper'?
I don't want to be a smartass but.... blotting paper
Lol.. okay. It just looks thicker than the common blotting paper I typically find which is quite thin.
The small FF kits online come with the paper
How much ferrofluid is needed to properly fill the T33 gap?
Usually when you buy it comes in premeasured amounts based on what size of voice coil you have for example one inch like you see with many dome style tweets
how do u make sure the voice coil is perfectly aligned in the center gap? what happens if it is slightly to one side and rubs ?
That's what the alignment pins are for...
didnt see any alignment pins?@@donny303
Oh now i do....my morels dont have those.
why not positive negative markers
Why do you only lightly glue it back? Why not glue it back as strong as it was?
I subbed
Too much glue and it's never coming off, plus it's not necessary. Table has 4 legs, not 30
Why not use some alcohol in the driver?
Пылесосом разве не проще убрать жидкость? Или керхером выдуть.
말이 무척 많네 ㅠ
High-quality, expensive tweeters do not use ferrofluid cooling. This is true, for information ))
Vintage speakers all use ferro fluid.
Can you tell me what kind of contact cement you used and Is Farrell fluid just Farrell fluid or is there a certain kind or brand thats better? Thanks