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The (new) HD800 Impressions Thread

Discussion in 'High-end Audio Forum' started by valentinhogea, Feb 10, 2013.
  1. FLTWS
    Shouldn't replacement parts be the same as for HD800S?
  2. Svatopluk
    Yes, I think Sennheiser is avoiding a lot of duplicate part numbers by listing the HD800S only.
    Last edited: Feb 7, 2019
  3. leng jai
  4. johnjen
    Those metal grill covers (#020 if this is what you are referring to) are p/n 533369 and the last time I checked the price it was ≈ $14 each.

    HD800 exploded view.jpg

    I have 2 sets that I have removed from my 800's, so if you want a set let me know and we can work out the details.
    But I'd also suggest as a possibility, if SQ is high on your priority list , to remove them and see if there is any change for the better, or not.

  5. leng jai
    Yeah I saw that picture but I couldn't find a link to actually buy that part by itself. Do you know where exactly on the site you can buy it?

    I'm open to SQ improvements, what is the difference with the grills off? First time I've heard of that making a difference to the sound quality.
  6. johnjen
    I usually have to call Sennheiser and talk to the repair/parts department to order the parts I need for the 800's.
    I've never been able to order them online.

    What I noticed after removing the grills was a less veiled acoustic presentation.
    Less added resonances that makes for a 'cleaner' experience.

    It is (relatively) easy to remove them and then put them back in, to determine if this is an improvement, or not, for you, assuming you have the tools and know what you are doing, etc.
    It is one of 3 basic mods I have performed on my 800's.

    Last edited: Feb 8, 2019
  7. leng jai
    Sound interesting, do you have a guide or tutorial handy for removing them? I suppose I'll have to do it if I want to replace them anyway.
  8. johnjen
    No I don't have a write up, but perhaps there is a you-tube video.
    It's really not that hard, assuming you are familiar with performing such delicate tear downs, not to mention putting it all back together, as there are only 6 tiny torx screws.
    Just make sure you don't slip with the torx bits and don't force anything.
    These 800's are designed very well for being repaired/modified/taken apart and re-assembled, multiple times.

  9. leng jai
    Might have a look on Youtube. Do you mind posting a picture of what it looks like with the grills off?
  10. johnjen
    Sure, here you go.

    Note: I have changed the small mesh screens to felt, in the very center of the driver as well


    omniweltall likes this.
  11. Whitigir
    Changing the center grill with felt would alternate the sound significantly wouldn’t it ? What effects have u observed by far ? Thank you
  12. johnjen
    I didn't notice much, if any, change at all.
    I even tried with it being completely open with the same results.

    And yeah I thought I had really messed up and might need all new drivers etc.
    I mean that is the center of the driver and the 'back wave port' so to speak, so I was in 'unknown territory' so to speak.
    Until I listened, and listened some more as I continued to fuss with this 'change'…

    The only reason I changed them was because I inadvertently collapsed one of them, so I pulled it all the way out and listened, then pulled the other side and listened again etc.
    All the way until I had installed the felt inserts and have left it that way ever since.
    They aren't even glued in…

    Last edited: Feb 9, 2019
    Whitigir likes this.
  13. eeagle
    Interesting info and experience, thanks. The felt insert reminds me of the SuperDupont Resonator (SDR) that is so popular among many HD800 owners.

    Another interesting thread w/some pictures
    Last edited: Feb 10, 2019
  14. Whitigir
    That is the part that hd800s has and regular 800 doesnt :)

    helmholtz resonator

    I think Sennheiser did some speacial researches to come out with the materials for it to revise into 800s
    Last edited: Feb 10, 2019
  15. STR-1
    Selling my 3m Black Dragon Premium V2 cable terminated for HD 800/S (with hard adapters for use with focal Utopia). PM me if interested.

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