i've owned 2pairs of Ksc75 for a coupla years now although both share litttle listening time as i'd differenct cans to play with plus im not so hot about earclips as i do find them atad uncomfortable (mayhaps irritating even after some prolonged wearing). anyways i finally have both pairs back in my hands after some serious (looking and sounding) mods by bro PCdude.

the gist of this post is that i found 1pair of K75s to have better, deeper and more impactful bass on top of being less grainy than the other pair. i've discussed at some length PCdude about this phenomenon and whether its all just my imagination. it turns out that bro PC have not only had loads of experience of K75s innards (thru his mod services), he's even touched the membrane of these things.

bottomline is accord to bro PC, the membrane of this particular K75 is softer and hence more flexible than others. he told me that he's only encountered 1other example of this particular K75 phenomenon. when i 1st did a brief comparo with my newly acquired PK1 to my other mod-recabled K75, i could swear that the PK1s are superior. bro PC oso agreed when he tried my PK1s lastweek.

then came this final K75 to be super mod'd by him and he told me at delivery that this particular K75 sounded great paired with a PPAv2. sure enuff i went home and did some listening and comparos with the PK1. my present conclusion...this particular K75 is equilavent to the PK1s to my ears atleast. the superiority of this particular K75 to my other identically modded K75 is not subtle IMO. needless to say, i'll be keeping this super K75 for a longwhile!

anyone else experienced the samething?

ps:FWIW i've oso heard from EFN that his bud's old (5-10yr old K75) sounded much superior to him against the newer models.

wow, modded KSC75 = PK1? You can still sell it without losing too much scottie! Maybe one day I should put my itchy hands on my K701's innards, perhaps with my nasty fingers they will sound similar to a K1000

Sallute to you bro Pcwork, its a great achievement nevertheless

Perhaps they're like the PX100, old batches of them we're supposedly with different drivers

depending on how u look at it, it can be said its awesome that a cheapie true budget can like the K75* can be brought to this level of performance. another view would be that its simply amazing that a 'bud' with belakang mati looks can sound this big with this level of ability.

O btw, no guarantees on what mite happen if u start rubbing the your K701s membrane. u mite get a hot looking genie of the headfons or u mite get a goat or most likely, u turn yourself on who knows...u may find out u dont need a woman at all ?? nows the time to find out . goodluck bud .

*do note that this applies only to this particular K75 and not the regular models. i do happen to have another set of identically modded K75 and it does not perform to this level. crazy aint it???

This post has been edited by scottiebabie: Aug 26 2007, 12:14 PM

no dount , i found that modded ksc75 sound really great, and it have the air feeling as it is an open cans, the sound is so superb while pairing with ksc75, u will be fly without u urself know it.

and i have tried the pk1 yesterday, i was really that , which i had the same feeling like the first time i test the modded ksc75+ ppav2, but i do have to admit that, pk1 delivered more details and better feeling, the signatures is totally diff, so i really dont know how to compare it.

but both are super worth.
pcdude, u really done a superb job.

yeah right man, imho can say the modded from bro Pc definiity out of our thought he really done a superb job. Totally can put in my favourite music become a hifi signiture sound.

Hehe, i just met with bro PC and tested his 'revived from death' punya KSC75 and the recabled KSC75 (and other bunch of headphone, i like the 580 so much can see the smile just appear on my face when the vocal part started )

The 'revived from death' punya ksc75 have a deeper bass than the recabled ksc75. and the high part is not as bright as recabled ksc75. and i'm so honored that he even open it up and gave me touch the membrane (lol, should i tell this? ) but of course he got warn lo to be careful and stuffs.. freaking soft membrane, i also scare i spoil it..

The recabled ksc75 pair up with his diy cmoy + interconnector really sounds great (the performance on the metallica song really surprise me, and of course pawn 580 miles away in metallic songs). Anyway when compare side by side (580 with recabled ksc75) with vocal song, ksc75 doesn't loss too much to 580.. what a sweet experience with all his black widows.. and really learn many things from him

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Added on August 26, 2007, 4:40 pmOh ya, and i got my sleeved cable from him ..really superb workmanship

This post has been edited by nicholas_1213: Aug 26 2007, 05:24 PM

lol.. looks like this thread is discuss about me rather than ksc75?
hahaha
another pair of ksc75 which have superb bass is owned by coolerthings. =)
and the one i remove the voice coil and power them up again does sound like it.
however, i think, there might be two reason for that.
1. Burn in process. one that has superb bass always is the one that had been used at extended loud volume over a long run.
2. Batch different (which i think has the possibilities, but low.)

bro scott, why don't u burn in another pair with not so supreme performance over the listening volume for another 100 hours and let see the result by comparing both of them.

Now I got a old batch, does that mean I got better drivers inside?

i get 2nd hand one, hatam oni, accidently might get good driver as well.

hey Wala try rubbing the membrane like yrh. who knows if nothing else, u guyz can both turn yaselfs on and..... . if your K75s dont sound better, at least u guyz will feel better !

last a few night, i tried to open another spoil ksc75. which the voice coil is broken in the middle, (around 4 round from the begining).
so i took the voice coil out, detach it from membrane, and carefully pulled out the voice coil until the broken part.
in this process, i unavoidable have to touch the membrane for a lot of time.
then
after i fix the membrane to voice coil, i found out though a 0.1mm different will make the voice coil to touch the magnet, and it will sound bass less.
so. i have to repeat the whole things again, detach everythings, and reattach the voice coil to membrane, then the whole membrane to ksc75 spider.
ok
after several hours of continues mess with the driver, the paint on the ksc75 membrane is fade off...so... what do i get?

i had got myself a super duper heavy bass ksc75. no kidding that the particular ksc75 bass is actually as deep as my modded hp890.


Experiment Methodology Used :
currently, i have two driver that's dead and repaired.

first driver lets call it A-R. it's a right driver. which is the driver i posted picture for the first time i get my hand on voice coil, and it's my own KSc75 after 8 times of recable that i finally burned the voice coil.
and another driver is A-L. which is totally normal driver that comes in a pair with A-R and i had never operated A-L.

and another driver B-L, which is from elh82 that he send two pair of ksc75 for me to repair, one pair is done recable and return to him, and there's a problem on the second pair. Before i actually recable it, i test the driver with multimeter and found out that the driver is burned in the voice coil. (after operation it's confirmed that the voice coil is burned around 4 round from the beginning of the voice coil).so i told him that his voice coil is dead. so he give up with the ksc75 and he had give it to me.
this is the driver that i had open so many time, and repair it. and this is the specific driver that has super bass now. so it's matching pair is B-R. right driver from elh82

Result:
A-L + A-R =
1. on both stock cable and recabled, each side sound similar to another side.while i find that my cable does sound better for the koss even compare to stax low capacitance cable... =P

B-L + B-R =
1. i had use B-L and B-R with stock cable , both have similar bass.
2. while i use B-L and B-R with my cable, B-L has much deeper bass. which is SO MUCH deeper and punchier than the B-R.

B-L+ A-R =
1. i still found that B-L has more bass no matter on stock cable, nor the custom cable i use for recable ksc75..


Results and Discussion
through every of my testing B-L has more bass no matter what i pair with, or what cable i used.
i can only make assumption that, the softness of the membrane,will directly influence the sound of the ksc75.
and imho, the softness of the membrane can be achieve after extensive vibration that can be done by extensive burn in (1000 hours maybe) and it will produce much smoother sound and heavier / deeper bass, provided we recable it.
i had tried to put back the specific driver back to the original cable, and the bass just gone.

Conclusion :
Due to B-L has more bass. hence the softness of the membrane no matter through physical contact, or continues burn in, will contribute to more bass. so it's safe to say that there's no batches different in term of bass production.
reason, B-R has less bass compare to B-L.



This post has been edited by PcWork: Aug 29 2007, 07:52 PM

Wah complicated. PCdude, I cant call up your phone?

try call again. just now talk with ppl
hehe

woot! dude ur explanation sounds like another of ur lively lectures on soil diversity!!! LOLz! regardless of whether its different batch or lotsa burn in or tender loving care, 1 K75 sure sounds bassier than the other.

FWIW bro EFN also mentioned about the better sonics of older K75s compared with recent models.

I mean I called yesterday, and day before yesterday, enter voicemail?
And I sent two SMSs?

aiks dun have wor.
akabane can call me wor..

Got problem le... Wanna ask you about the cd image one...
Where are you? In forest? I seem cant reach you...

me in serdang lah..
now in subang.
shall not have problem..

hey PCbud, me thinks bro wasabi is jealous la! u 2 have a lovers quarrel or what?? aiyaa...no need to ignore wasabi le. i hope u 2 kiss and make ya

no no no.. i paktoh with my girlfren now.. =)
wasabi has yuheng sexy sister... hehe

Who needs a PCdude old man when I have a sexy girlfriend?
Just wanna ask some small stuffs.

Dudes age is nothing but a number LOL!!!!

Oooooo mayb bro waaaasabi like his boyfrens young! lolz! just kidding bud. im sure wala like his GF juz fine

bro PC ..
just wanna ask osmething .
my KOSS 75 , virgin set ...

the right earphone , the sound quality like got something wrong . it isn't not bassy , but some small and tiny noise like small metal touching each other ... or sometimes got zzz sound during bassy time .

is it speaker crack already ?

Aiyoo another problem with Koss75???

Every product sure have some QC problem if mass produced.

Yes but why did it have to be mine???? I am missing so much my Koss75. I hope i can get my replacement soon.....

You are unlucky. Haha, just buy a new one la. Good product must keep.

Buy? New product got warranty mahh.. that is what warranty is for: manufacturing defects!

Mine under warranty....just waiting for my Koss75 to come back to me. Hurry hurry come back to me....singing lol

it will need to wait until i go back at 30th. it's impossible u can get it before that. sorry about that..
and to be honest, i found that it's quite hard to convince their personal that the unit is defected. they play it and they can't heard it, then i will really hard to explain to them.
i truely afraid they will refuse the warrenty as they can blast it loud yet no cracking.
aiyo.

That is what I am afraid also.. if that is the case, how?
MadZiZ, looks like your M50 will be coming in earlier

infact, until now, the ksc75 still don't give me a cracking sound.. how shall i do?

yeah, that day mamak with pcworks, i was in make it really loud, no cracking as well.

It has been established that there i sno problem with loud volume.
at certain music frequencies that the 'crackles' is audible.. not that really noticeable but it's irritating..

the problem is, it doesn't come out always. how do i show to ppl to say it's defect?
that's really bad..

A very good question indeed! I don't have a clue.. good luck dude!

A suggestion:
Why not let MadZiZ have it back for re-evaluation? Now that the KSC75 had been burn in by you, who knows, it has dissapeared?

i was thinking of that...
i will run it for some time. then hopefully it's ok. totally no buzz. or the buzz become worst that it exits all the time. so i can easier tell distributor that the koss is defected.
and i also hope that it's the old ipod giving out the buzz or maybe specific track, and hopefully new Gmod doesn't has the problem. hopefully.
because up to now, i use with zune alone, Zune + Cmoy, zune + PRII / BOSE alone, Bose + cmoy, Bose + PRII i don't have the buzz problem.
i remember madziz show me with his ipod and i had heard the buzz, i know it's annoying, but i just didn't heard it another time.. i hope it's the source. anyway, i will check it again.
headphone failure usually won't come out at certain time only. it will has buzz all the time if the membrane, voice coil has problem. especially on louder volume.

edited : typo

This post has been edited by PcWork: Sep 15 2007, 02:22 AM

That ought to do it.
There's nothing much else to do isn't it? I think you've done your best.

i 2nd on wat PcWork say
i sold so many dun have this kinda problem tat some time got buzz some time no b4, if have hizz, it will hizz all the way, all buzz all the way
dun tell me earphone got "period" come, buzz when he want, then normal back when he feeling well, tat's kinda weird dont they?

This post has been edited by CooLeRthings: Sep 15 2007, 12:50 AM

i oso juz sapu one KSC75 with volume control de..does it got any diff with the normal ones?by the way its 1 year old used unit..yuheng oso got ask why so fast sold..lolz..headphone on the way now.

Difference is when you get it recabled bro.....then bass is tighter and mids is cleaner

Synergy is the problem!

Synergy bla bla.....but all i can tell you is that the sound is FABULOUS and worth the mulas spend Anyone that is a disbeliever can ask around and then i can bet they will go for the modded Koss75 by PCWork

hahaha
thanks for the superb support from Madziz.
the sound is so far, the best among 8 types of cable i ever tried.
in the other words, we can say the Synergy between the cable and the driver is there..
michaelyii1988 . the volume control one has no different interm of driver. but it will sing better after recabled.

yea..hmm..i did c u mention b4 tat rm140 can fully mod a KSC75 rite?plan to do so..haha..btw,we both are Mirian leh..lolz..initial.craig remember,he say wanna meet u when u back miri this month end.lolz.

---

Added on September 15, 2007, 5:06 pmif i wanna make ny KSC75 undefeatable,nid how much?juz the recable n all those amp lah.lolz.

This post has been edited by michaelyii1988: Sep 15 2007, 05:06 PM

haha, dunno can meet bro PcWork o not... been busy with assignments and tests, wan go toilet oso no time... ahahaha... now steal some time surfing here...

Bro, normally when Bro Pc came back that time is the best time to meet. His Phd is really make him presure alot lar...

DUDE i think u remember wrong lah..
i already in miri since wednesday. and TONIGHT IS THE LAST NIGHT i stay in miri. tomorrow sunday i am going to mukah.


to mod the ksc75
it's RM 60 including imported cable + workmanship. (not including postage)
the amp, that i am selling right now is quite a good match with ksc75. Portable reference II that i selling for RM 300 non-including postage.
it sound really good on ksc75. and several ppl had kena poison because of that too. =P
by the amp doesn't come with stereo cable. if you going to take the amp, iwill give a very special price for the latest Quantarium cable for u to match on the amp, the price will be very very cheap for the cable. i can sell with half of my cost price for the cable as a "starter pack". think of it as promotion.

wow..tat will over budget.hmm..too mahal..ahaha

u talking like punching urself damn hard right on ur own face
RM 500 include KSC 75 with amp n nice cable u say mahal?
then how bout PPAv2???
n other better amp?
better cable?
u want unbeatleble ksc-75 wat
so ma need to pay lo

ah dang.... forgot edy... aduu, need wait next time to meet lo...

abt the ksc75 lifetime warranty thing rite,got cover wad leh?if the cable come out got cover?how bout if accidentally tekan then the joint patah?got?or only when rosak internally baru can change?

This post has been edited by michaelyii1988: Sep 17 2007, 10:18 AM

why koss ksc75? get my yuin pk1! more poisounous!!! lol lol..

btw, modded koss ksc-75 sounds good too paired with low gain amp like the LDM+

yeah, pk1 is a poisoning ear bud, never tried never know...

pls bear in mind that all headphone warranty does not cover wear and tear and abuse.

pk1..hmm..wait longer a bit la.haha..play play with my koss 1st.lolz

Poison poison....the Yuin PK1. Damn sweet sounding earphone. Good luck to your sale bro dgrebel!!!!

---

Added on September 17, 2007, 5:18 pmAiyoo yuheng of course got no warranty against people who abuse their earphones/headphones but who is crazy enuff to do so??? If there are people like that outside then serve them rite when phone kaput LOL!!!

This post has been edited by MadZiZ: Sep 17 2007, 05:18 PM

You want unbeatable KSC75, get PPAv2, and a good source.

This post has been edited by walabies: Sep 17 2007, 09:59 PM

ehem2. it cant even be used with govibe6. dc level too high for ksc75. sound will distort because of too much clips.

trust me, i've tested jazzy's modded ksc75 with govibe6 and it doesnt pair very well. and PPAV2 will do the same towards the koss.

LDM+ is enuff to drive the modded koss.

This post has been edited by dgrebel: Sep 17 2007, 10:02 PM

what you pay, what you get
LDM+ good enough for begginer
and it sound really good with ksc75

Poison TeOtq, he will like to grab it

lao... walabies you really a devil
PPAV2 very expensive leh


i've tested jazzy's modded ksc75 with ldm+ too last few weeks
sound really sweet
i still have two virgin ksc75
after do some testing, i will send to Pcwork

Yeah_guyz......good idea send it to the promaster of cables. Then i gurantee your virgin Koss75 will sing you nicely to sleep

PCWORK mod cable will cost how much leh?

Haha that one you have to ask PCWork.....not too much la but you will be so amazed by the sound quality.

cheap cheap only RM60

thx yeah_guyz for the price..

Not really. Some know how they 'should be' priced. Especially a 2nd hand unit. It wont cost much.

Yes cheap2 so everyone can enjoy Koss75 excellent sounds Good job PCWork!

FYI,
The KOSS KSC75 also partnered well with PA2V2,my previous headphone amp. LDM+ edges the PA2V2 interms of vocal and high frequencies control.
It is superb when driven by LD2+

Mine partnered well with my previous Portable Preference V2, AT-H20, GoVibe6 and now just waiting to test with my X-can V2. I think with the track record it will go superb too. Now have just to wait for it to return to me

wanna fight ur PK1 with my super duper voice coil operated crazy KSC75???
hahaha
that one, i made it out of accident, i can't make it for other ppl.
ask yuheng which one is better =P


Madziz : i will replace a whole new driver for ur right side driver as i am buying in a new ksc75 for myself.
the old driver if i found no problem then i don't mind to use it for my own..
so 30th i go back, in 2 days i shall meet up with u to pass u the ksc75..
sorry for the delay.. sorry.

lol advice is.. don't attemp to recable it too much time dude.
some time, u can easily kill the driver.
reason : the voice coil is too near to the soldering point. too much heating the soldering point will at the same time heat up the voice coil. AND it will bring to 3 different result.
1. Nothings happen if u are lucky
2. Voice coil is melt, no sound from the headphone.
3. Voice coil gets too hot and before it melt itself, it melts the membrane..
so.... think twice if u want me to recable, it's already one time heat..i don't want u recable recable, then send to me, sekali i touch it, it just die..
then i charm loh............
too much time of heating will degrade the voice coil too. my old old ksc75 has the voice coil changed colour slightly.
i think because i recabled it too much of time.


This post has been edited by PcWork: Sep 22 2007, 10:43 AM

actually KSC75 seldom got in the shop kah??
coz i only see those seinheisser la..all those quite common de but seldom c KSC75 o..

Got if you look carefully in Low Yat....saw a few. But price higher than what PC can get for us

harder to find, last time all IT has it.


=) i get directly from coolerthings mah..
=)

Now All IT also have~
But, it sell RM89, quite expensive~
But there are different packaging compare wit last time~