I Just Created An Insanely Great Pair Of Headphones (koss Ksc75 Mod)

Discussion in 'Accessories' started by peskypesky, Jun 17, 2019.

  1. peskypesky

    peskypesky Well-Known Member Supporting Member

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    So, some of you may know about the Koss KSC75 clip-on earphones. They are legendary for providing a fantastic sound at a price of around $17.
    b0a524929fd8f3f572a87ee58d81a9db.jpg


    Well, like many, I had a pair of KSC75s that I modded by attaching a lightweight headband from Parts Express. The increased pressure does provide a fuller sound...and you don't have to be clipping them on.

    421018525f80f91cd01067e9bc16f4a6.jpg


    well, a few days ago, i was rummaging though a box of my brother's broken and/or corroded headphones, and I found these:
    2047fb2542b9814239d48610ba0ad599.jpg



    I found some foam pads from another cheal set that fit. Then I found a broken pair of Sony MDR-V1s. I thought the KSC75 drivers might fit into the Sony cups....so i opened them up, ripped out the Sony drivers, and was super excited to discover that the Koss drivers fit almost perfectly! Like really, really close. So I got some Superglue and stuck them in there.

    5342f25e21ad1f1c297608249184aaf1.jpg


    Then...the moment of truth: how would they sound?

    Well...they sound FREAKING GREAT!!! Like jaw-dropping great. Very loud, great clarity, powerful bass, nice mids, and crisp highs. And the music sounds so PRESENT. I was giddy with excitement at how great they sound....so I decided to put them to the test. I did an A/B comparison with my brother's Grado PS1000's....which cost over $1k.

    And you know what? I think the modded KSC75's sound better. No lie. They are just more robust and dynamic and present.

    I will A/B these with some other headphones tomorrow, but right now I am thrilled to bits and blasting Yes's "Close to the Edge"....

    I'm going to order a used pair of those Sony's for $15 from ebay to use with my other KSC75's.

    I highly recommend you do the same. For less that $40, you will get headphones that will blow your socks off.
     
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  2. rrobbone

    rrobbone Well-Known Member

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    When you do, would you document the surgery? I'm interested in seeing what you're doing.
     
  3. peskypesky

    peskypesky Well-Known Member Supporting Member

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    There's nothing to it. Just pull the Sony drivers out. Then you have to remove some plastic ridges that held drivers in place. I just snappeed them out with a flathead screwdriver.

    Then just super glue in the Koss drivers. No soldering necessary.
     
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  4. MichaelR

    MichaelR Well-Known Member Supporting Member

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    Interesting! Yet another project but I do need new headphones.
     
  5. andrewsrea

    andrewsrea Well-Known Member

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    Are they closed-back?
     
  6. DonTonberry

    DonTonberry Well-Known Member

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    Hmmm might have to try this....my Parts Express headband is starting to fall apart
     
  7. Chocol8

    Chocol8 Well-Known Member

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    Hmmm, look what I have in my office desk drawer...

    589E3349-FA53-4643-9DD7-7828D6CFCFC8.jpeg

    Different headband than the V1’s but the cups are likely close enough, and they sound plenty shitty to warrant surgery.
     
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  8. ronnx

    ronnx Well-Known Member

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    Nice wor
    Nice work Peskey!
     
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  9. ronnx

    ronnx Well-Known Member

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    (y)
     
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  10. Poodlesrule

    Poodlesrule Well-Known Member

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    I have a few Koss pairs, bought following PP's recommendation!

    One working set. Great
    I also happen to have a Sony headset which sucks, so here is my donor!

    Two more Kosses have only one channel working, so I figure I could make a good pair out of them, if I find the right method to sort out the wiring.

    BTW, magnets inside drivers can be useful for other types of hacks, like bike computer triggers and such.
     
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  11. peskypesky

    peskypesky Well-Known Member Supporting Member

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    I highly recommend doing this. I am just stunned at how good these headphones sound, so I'm racing through my music collection trying stuff out.

    I'm going to make some coffee and then A/B them with some other headphones. I bought a signal splitter last night at Walmart just for this purpose.
     
  12. peskypesky

    peskypesky Well-Known Member Supporting Member

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    sweet!

    yeah. my brother had another set of really shitty-sounding Sonys in the rubbish bin, so I ripped out the drivers. The Koss didn't fit in those as snugly. Would need to put some foam padding in there for a more secure fit. but don't know how that might affect sound.
     
  13. peskypesky

    peskypesky Well-Known Member Supporting Member

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    are they KSC75s that arent working? If so, I think I read that Koss offers a lifetime replacement on them. I'll check on that.

    [edit] I've read a lot of posts from people saying Koss will replace them. Check with customer service.

    I've been lucky, as my pairs of KSC75s have not had cable failure. But it is definitely a thin and flimsy cable. I wish I were good enough at soldering to re-cable, but I'm not. So I may look into some other method for adding robustness to the cables. Maybe heat-shrink tubing at likely stress points.
     
    Last edited: Jun 17, 2019
  14. peskypesky

    peskypesky Well-Known Member Supporting Member

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    the KSC75s are open back.
    The shell I put them into is closed back. But they still sound great. I might experiment by making some holes in the next pair of donor shells I use.
     
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  15. stevebway

    stevebway Metaphysician & Ham

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    Well, did OK with the Mouse.

    ordered
     
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  16. Poodlesrule

    Poodlesrule Well-Known Member

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    The Koss replacement requires you register the product. Says so in the last set I bought.
    I often wear them in bed in middle of the night, so there is a bit of stress.
    The ear wire retainers sometimes snap out, but it is a useful feature, I think, and they go right back on.
     
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  17. JAMES SCHAFFNER

    JAMES SCHAFFNER Well-Known Member

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    I have a pair of the KSC75s as well and they are fantastic sounding. I also have a set of the Koss porta pros that are really good too but a little bassier than the KSC75s are. If you search around there are a lot of mods people try with the KSC75s. I haven't tried any though as I am very happy with the way they sound stock.
     
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  18. peskypesky

    peskypesky Well-Known Member Supporting Member

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    They really sound fantastic.

    My thing is, I like robust bass, and without some pressure to push them against the head, the bass is a bit weak. That's the audio reason I prefer them with headbands. And functionally, I just don't really like clip-ons. Just not my thing.

    Ok, going to do some A/B comparisons. Stay tuned.
     
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  19. Tiga

    Tiga Well-Known Member

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  20. Chocol8

    Chocol8 Well-Known Member

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