This happen when i am hand itchy wanna recable Stax cable on my KSC75. and i carelessly wipe the voice coil with my soldering iron. hence the voice coil is detached from the terminal.. and it's burned..

therefore, i decieded to reattach the voice coil by opening it.


All things that i opened, including KSC75, Stax SR-X, Aego 2 Satelite driver.



Stax SR-X driver, the round things is membrane, while the gold colour places is stator.



Tachikoma's Aego 2 Driver
Magnet detached, voice coil dented.


Front view of Satelite, note that AEGO M no longer using this KOI audio's driver.
it's triangle eh.. =P




HERE COMES THE KSC75

Membrane, and the internal (magnet & Spider) of the driver.


Heck it's actually transparent..


It's still in perfect form (i didn't dent it) while i take it out.


Impedance test on the driver itself..
my multimeter has an error or +0.3 ohm
so the driver voice coil impedance is 58.3 ohm to be exact.
however, i assume that the terminal parts does provide some impedance to make it 60 ohm in total.



Successfully attached the voice coil back to the terminal.


Front look of the membrane after reattach back to the spider (housing)


Good things is after fixing the voice coil. the sound signature doesn't change at all. no distortion i can hear even amp it loud, really loud.
and it's still kicking hard on my head now.. nice.. =P
so hope this will let ppl know what is actually inside a KSC75. =)
enjoy pictures..


This post has been edited by PcWork: Apr 7 2008, 08:31 PM

lol, posted it up already haha... was it my ksc-75? or urs?

Yours.. hahaha
that day no sound because i didn't connect it properlly.
and they are in a rush to going back. so i give u my spare driver. =)

and then i was hand itchy wanna put stax cable on it.. and i cough heavily while i solder.. and viola.. stax cable is connected, but not the voice coil. lol


so now.. no more re-cabling until i fully recover...
ur driver died twice (not twice actually, first time is careless mistake by not connecting it properly, which there's a tiny wire from the ground channel accidentally touched the signal channel. so sending everything back to ground, no sound. haha) . and it's kick hard on my head now.
wait u come, i let u test, see u can notice which side i repair by listening it or not..
but so far, myself and several of my audiophile friend cannot do that. =P

This post has been edited by PcWork: Jul 5 2007, 04:49 PM

i dun think theres really much of a difference la, unless u didnt put them back properly, it would probably be the same. i might need some 3.5mm to 3.5mm cables from you some time soon, oh ya, and my hp890 plug also cacat.. might need some plugs as well.

u really haf much time eh, hows the pimeta parts of yours ler?

BTW, impedance is real+imaginary resistance in freuqency domain, measuring via multimeter alone do not suffice.

PCwork is really free ma... Btw, he still own us something...

own or owe? owe what?

Not u la. It is TS.

What is TS?

all i can say is.....CONGRATS!!! to brader PCdude!! certainly a job well done above and beyond duty! Malaysia Boleh!! (thxs god brader PCdude doesnt belong to team NATO!!! )

lol
there's still a lot more things to learn.
pimeta is still half way built..

---

Added on July 6, 2007, 8:35 amthe repairing process only took me around 30 minute, with some time heavily coughing, lie down on bed, go toilet. =)


This post has been edited by PcWork: Jul 6 2007, 08:38 AM

wah lau you the l33t lar! (no pun intended). Even I dun have the ballz to mess with voice coil...well actually I have no ballz to actually disassemble the whole driver since it is a very delicate thing and the process calls for significant amount of patience (what I don't have) and precision (although I have this ).

The soldering point has lots of craps eh...go pharmacy and pick up some 99% alcohol and clean it with a Q tip, and it'd look as good as new.

This post has been edited by AlamakLor: Jul 6 2007, 09:26 AM

very very tq for the suggestion..
will definately do it..

learn new things again today.. =)
haha. u definately can do it lah... just split them into different day loh. =) today take out membrane, tomorrow detach membrane from voice coil, another day to pull out the voice coil, and one more day to attach it..
=P
it's a matter you want or not only.


This post has been edited by PcWork: Jul 6 2007, 09:30 AM

I can't do that, once I work on something I'd want to get it done the same day or I'll feel very uneasy and suffer from insomnia. which is why multiple stage process thingy is not quite my thing.

PcWork.. i think u did it in a day as well right? called me in the night and told me u were attempting to do it... then an early message sms said u did it

anyways.. good job

i really really really understand how u feel about this
it really makes u insomniac having something hangging over ur mind when its incomplete.

Hurry up and do my amp already... I need to get that back before I go to australia =P

u really jerk.. pushing me all around.
even i sick also ask me fast fast fast...

New Recabling version for KOSS KSC75 from our BRO PCWORK also known as KOSS KSC75v3 Pcwork Edition

below the the link for some pics

http://forum.lowyat.net/topic/274651/+1200