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KZ ZS6 IEM Modified
KZ ZS6 IEM Modified
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Old 9th November 2018, 06:48 AM   #1
EUVL is offline EUVL  Europe
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Default KZ ZS6 IEM Modified

Tipped off by Mr. L at the other place, I got myself a pair of KZ ZS6,
and followed his mod to the last word :

1. Rewaire the two balanced armature in series.
2. Replace the 0402 cap with Panasonic ECPU (I used 470n instead of 680n).
3. Remove the 0402 resistor and rewire with a 7.5R Beysclag MELF.

DIYHiFi.org • View topic - Affordable "High End" IEM with excellent SQ after small mods

Quite fiddly to do, so great soldering skill with SMD required.
You have been warned.
But result is real great sound for very little money.
Highly recommeded.

Cable I used :
https://www.amazon.com/KZ-Dedicated-.../dp/B07DDHYLP6

Source : Laptop or Pono Player

Amp : XEN ZGF Portable
XEN ZGF Portable Headphone Amplifier


Have fun,
Patrick

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Old 9th November 2018, 01:05 PM   #2
WoodyLuvr is offline WoodyLuvr  Thailand
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Holy cow! I would have utterly destroyed those iems with my combined atrocious soldering skills; poor eye sight; and hand tremors! Impressed. Enjoy.
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Old 9th November 2018, 04:19 PM   #3
EUVL is offline EUVL  Europe
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Practice makes things perfect.




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Old 11th November 2018, 10:06 PM   #4
weissi is offline weissi  Austria
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Thanks for the heads-up. Will do the mod soon.
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Old 19th November 2018, 01:41 PM   #5
Puggie is offline Puggie  United Kingdom
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Very interesting, I have had a couple of pairs of these (my grey pair got nicked at work, so now I have the reds like these ) and I've been using the Comply wax guards as you mentioned and substituting the mesh grilles for 2.5mm stainless washers. I'll be trying this mod for certain can you confirm was it the 0204 0.4w Melfs you went with and which caps as digikey are showing the ECP-u range as obsolete.

Might have to buy another pair of these, someone must be slashing them for black friday
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Old 19th November 2018, 04:39 PM   #6
EUVL is offline EUVL  Europe
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ECP-U1C474MA5 Panasonic | Mouser Europe

MMA02040C7508FB300 Vishay / Beyschlag | Mouser Europe


Patrick
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Old 15th September 2019, 07:09 PM   #7
Pars is offline Pars  United States
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Just did this mod to one of the 2 pairs my brother brought with him for his visit to the states. Was a little dicey as one of the drivers was rotated to the point where the cap interfered with the dummy screw and boss on the cover. I managed to solder the cap inboard enough where it fit (and put a piece of electrical tape on it just in case.

These sound much better with this mod; before they were "tizzy" sounding in the high end; now they are still a touch bright but quite listenable.

I may just disconnect one of the tweeter BAs on the other pair and see how that sounds. Wiring these in series is the hardest part of the mod, at least to me. I had seen Mr. L's post on this at the other place before and showed it to my brother, who then asked if I would do this. I used the same resistor you listed (also got some 102s), but used the 680nf cap as Mr. L did.

The parts I used (Mouser):
594-MMA02040C7508FB3
667-ECP-U1C684MA5

the 102 resistors: 594-MMU01020C7508GB3

Last edited by Pars; 15th September 2019 at 07:13 PM.
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Old 15th September 2019, 07:14 PM   #8
EUVL is offline EUVL  Europe
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> I may just disconnect one of the tweeter BAs on the other pair and see how that sounds.

If you want to do so, IMHO you need to place a resistor to replace the "missing" tweeter.
Else you are still putting full voltage, but now double the current through it.

I find adjusting the damper foam quite effective in taming the brightness.

I did not use 0102, but 0204.


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Old 16th September 2019, 02:09 PM   #9
Pars is offline Pars  United States
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Good comment, hadn't thought about that. Somewhere I read about someone just disconnecting one of the tweeters, probably on head-fi (which of course is suspect). I'll look into the damping foam... I didn't take these apart any further than I had to.

There is a big thread on HF on KZ devices... I don't hang out there at all anymore but ran across it via google search. Apparently some people are getting drivers from Knowles and doing replacements, but I didn't read far enough to see which KZs they were doing this to. On the one ZS6 that had the driver rotated so that the cap was physically in a bad spot, I did look briefly to see if I could rotate the driver, but these appear to be glued in and I didn't want to break anything, so aborted on that approach.

I was taken aback at how small the existing cap and resistor are... about the size of a grain of sand Sure, I could hand solder that...
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Old 16th September 2019, 05:47 PM   #10
EUVL is offline EUVL  Europe
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> I'll look into the damping foam

Go back to read what Mr. L said about the foam.
They are placed at the aluminium case air outlet (ear side), and inside the rubber ear plugs.
At least mine are.


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