One of the tweeters in my 4412a's is damaged, the diaphragm is pushed in.
Where can I find a genuine replacement? It looks as though the 052Ti has been discontinued.
Thanks!!
Attachment 82659
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One of the tweeters in my 4412a's is damaged, the diaphragm is pushed in.
Where can I find a genuine replacement? It looks as though the 052Ti has been discontinued.
Thanks!!
Attachment 82659
It is very hard to get a new 052Ti,try to repair it by yourself:)Quote:
Originally Posted by SteveJewels
not to be snarky, ...;)Quote:
Originally Posted by martin_wu99
But, back to trying to be helpful ...in a worst case scenario, if unable to find a replacement 052Ti , then there are a few options .... live with the mashed one OR attempt to push it out from the inside (there is a good thread around here on how to do that , but focused on an 044Ti .. tho procedure is the same)Quote:
Originally Posted by SEAWOLF97
I tried google and found some, tho outdated & gone
$195/pr shipped ==>> https://reverb.com/item/5003068-jbl-...4412a-and-more
not sure what this is, but listed as an 052 replacement
https://www.spectrumaudio.com/jbl-74...dditional-info
can't get the 4412a tech sheet to open, so not sure what JBL recommends as a replacement if 052 not available. :dont-know: . Phil has a pair, mebbe he knows ??
Not snarky at all:blink:it is very common that tweeters have been pushed in,it does not have much influence of the sound,just try to fix it:DQuote:
Originally Posted by SEAWOLF97
You're probably going to be limited to used from Ebay or other sources. Hate to say it but you may also find that it's just as cheap and perhaps easier to simply purchase a pair of 4408A and robbing the parts!Quote:
Originally Posted by SEAWOLF97
The copy of a 135A offered by Midwest, and others, could be an alternative but use two. There's a refurbished one with new 052 diaphragm on ebay for under $200. There's also a pair of 4408A on Ebay for $270 or-best-offer. :dont-know:
Attachment 82661
This is the back of the OEM diaphragm which is what you will see if you follow these
simple steps
1 Remove the tweet from the cabinet 4 screws around the edge
2 Once you have that free of the cab , disconnect the leads. Excercise care here , no mad tugging. Use needle nose pliers if you have them.
3 Remove the four screws that are close to the diaphragm. Be careful with whatever tool you use here as the magnetic field can pull tools towards the dia. If you can get non magnetic tools that would be better.
4 Older iterations of this tweet used double stick tape or film to attatch the dia to the magnet but judging by the paper gasket in the pic there will be no resistance to mag coming away
5 Take care as you extract the magnet , try to lift it off as vertically as you can to avoid damaging the coil
6 Now you have the dia free find yourself a roll of Duct tape and use it as a rest for the dia with the coil facing up
7 Now here's the tricky bit , find yourself a girl with delicate fingers and at least one trimmed nail and have her GENTLY reform the original shape. If you are lucky it will mostly pop out like some dings on car bodies so . Any little wrinkles can be worked
away by gentle use of a rounded over wooden dowel.
Take care not to foul the coil.
8 Assuming you have successfully got the dia back in something like the correct shape you can now set about re fitting the magnet. The mag locates centrally held by the small lugs that I have highlighted. Again go as vertically as poss as you locate the two parts. Once it sits in place you are golden. Remember to align things so that the assembly screws line up with the holes in the mag.
I'm marginally concerned about the little edge of the dia (green arrow ) but it should be of no concern.
You may find a little foam bung under the dia. Lets see a pic of that
15 mins for the whole job. :)
Great!you made it so clear and exercisable:applaud:Quote:
Originally Posted by macaroonie
I like your solution better than what I did ... just the butt of a pencil with a good eraser to reshape it.Quote:
Originally Posted by macaroonie
Have done these 3 or 4 times on 044ti's , MOSTLY with good result. On one tho, the titanium was stuck to the foam gooey mess ..even tho I gently pulled it away, still the titanium dia cracked. :(
I grabbed the JBL sheet from Googles cache ..Quote:
Originally Posted by SEAWOLF97
Technical Manual
JBL4412A L,R
SPECIFICATIONS
STUDIO
MONITOR
Speaker Hi
Freq 052TI
Diaph Repl
D8R052TI
Repl Unit
74856X
which is this one .. https://www.spectrumaudio.com/jbl-74...dditional-info
$179.99 free shipping , looks like a single ??
I found a used 052 Ti, actually two, and have ordered them.
Once they arrive I will try them out to see if any combination is better than any other.
Once I have my 4412a's put back together I will find a diaphragm (If there is such an animal.) and try my hand at replacing the one that is pushed in. If I am going to go to the trouble of tearing the tweeter apart I might as well just replace the diaphragm and have another spare.
That brings me to the next question. Is there;
A genuine JBL replacement diaphragm available?
Something better?
Good catch. Nice to know that you can still get a new replacement driver instead of another (potentially worn out) used one.Quote:
Originally Posted by SEAWOLF97
I was wondering that too and about to quizz GRUMPY , since he seems to have experience with this model.Quote:
Originally Posted by rusty jefferson
"does the 052Ti have the same rotting foam problem as the 044 and 035" :eek::dont-know:
I received a very fair refund from the seller and ordered two used 052Ti's. That should get me up and running and a spare to boot.
Thanks for the posts in this thread regarding pushing the diaphragm out. I don't think I am going to try that but it has given me encouragement to try to replace the diaphragm. Are either genuine diaphragms available? Or perhaps an equivalent or superior substitute as in Truextent diaphragms for JBL CD's?
I replaced the tweeter with one that I bought from Jammin Jersey. Night and day difference in SQ, HF output and dispersion.
I wanted to follow up in case someone happened along this thread later. I tried popping out the pushed in diaphragm. I was able to pop it out, but there are still smaller indentations, like the dimples on a golf ball.
I reread this thread. Since I have a fully functional tweeter now I can work the damaged one and if I damage it, no great loss, I am going to try further to smooth it and make some measurements.
I would appreciate recommendations on mics to use to make the measurements. I am partial to Audio-Technica mics like the AT4050. Is that the right type of mic to make comparative speaker measurements? I have some of that series laying around somewhere.