HD600 M measurements and mod discussion

Discussion in 'Modifications and Tweaks' started by MrTurtle, Nov 10, 2017.

  1. MrTurtle

    MrTurtle Facebook Friend

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    So I've mentioned that I did the 650M mod on my 600 (without coin mod on front foam) and liked it. I know the HD600 lovers tend to really like it for what it is, so I apologise in advance for my sacrilege. Here's what my version looks like.

    [​IMG]

    I cut only the circle plastic support out and kept the plastic pillars on so that the magnet would be more likely to stay in place. You just have to use a nail clipper and press it up against the side of the plastic circle to clip it off.

    @jowls was interested in how it would help the upper mid hotness, so here are the measurements I promised you! All measured at 90db and aligned at 1khz. Distortion figures are still a wash because there's a road with quite a bit of traffic outside where I live. As always, all disclaimers about different measurement rigs and the fallibility of my own setup applies.

    HD600 pre mod:

    [​IMG]


    HD600 post-M mod:

    [​IMG]


    HD600 (red) vs HD600M (yellow):
    [​IMG]


    As you can see, the increase in bass from the removal of the rear foam means that upper mid and treble is reduced a wee bit in relation to the rest of the spectrum. Subjectively, it's enough to make the 600 a less fatiguing listen for me, even if the 3khz peak hasn't been tamed per se. Can't say for sure if bass quality has increased or decreased though. It's still HD6xx series bass.

    And for fun (usual disclaimers about different measurement rigs, etc):

    HD600M vs philipmorgan's HD650 (thanks for the impedance effect REW file you uploaded yonks ago!)
    [​IMG]


    Hopefully this thread can also be a discussion for all sorts of HD600 mods too. These babies deserve all the love they get and more.
     
  2. jowls

    jowls Never shitposts (please) - Friend

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    Thanks. I am in a long term relationship with my O.G. HD600 so I’m going to find a cheap second hand pair and give this a whirl. I would also be interested to know if anyone has tried KISS with HD600...
     

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