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Headphones with unusually large drivers

Discussion in 'Headphones (full-size)' started by vitalb, Jul 19, 2012.
  1. VitalB
    Hello everyone
    I've been finding headphones that have unsually large drivers and I noticed that there isn't a thread for them. (Correct me if I'm wrong) So I thought it would be a good idea to make one.
    I'll begin by throwing in the Lafayette Model F-990 with 3.5 Inch (88.9mm) drivers.
    And the Koss KO/727B with 89mm drivers.
  2. Dennito
    Sony MDR XB 1000 70mm
  3. obobskivich
    Koss ESP/950 if you count electrostats - AFAIK they're still the biggest electrostat drivers ever put into a headphone (and probably the biggest headphone drivers ever by extension*); 7sq. in. of radiating surface. I don't know the physical dimensions of the drivers (they're not circular).

    * EDIT
    After doing a bit of math - the Lafayette drivers have a slightly larger overall radiating surface, at 9.4 sq. in.

    Sony MDR-MA900 also have 70mm drivers. Sennheiser HD 800 have 58mm drivers. I think those are two of the biggest current production models.
  4. fabio-fi
    Sansui SS-100 and Fostex T30
    Most of the fostex models have big drivers. 
  5. TMRaven
    Are we counting planar magnetics and electrostats as well?  All of those have huge drivers.  Now I really want to try those Lafayettes btw.  They look sweet as well!
  6. obobskivich

    There's a pair claimed nib on the bay for around 50 bones bin.

    Also, if the 950s are still the biggest ESPs out there (Koss still claims them to be), the F-990s have bigger overall drivers. Regarding orthos, I don't know which one is largest - I would guess the LCDs though.
  7. fabio-fi
    A headphone is a headphone, op didn't specify. [​IMG]
  8. VitalB
    Sorry if I forgot to specify but yes I'm including all types driver types.
  9. obobskivich
    So the Floats and TakeTs should probably be mentioned then? :p
  10. VitalB
    Anybody knows how much more larger are the Koss than the Stax lambdas?
    There's the Koss A/250 and A/200 which shares it's design with the ESP but I can't find the driver size anywhere. Can anybody please give a measurement as they seem to be quite large.
    Speaking of Koss, from the vintage catalog I have says that the K/6 series headphones have 63mm drivers, same with the K/135 while everything else has 50mm drivers. Except for the K/145 with  38mm drivers, strangely it cost more than the K/135.
  11. VitalB
    I forgot about the floats, actually I think almost every pair of headphones based on the Jecklin Float design has large drivers.
  12. obobskivich

    The A/250 and A/200 internally have almost nothing in common with the 950 - they're dynamic cans.
  13. VitalB
    That I know, what I'm asking is since the A/250 and A/200 share similar or even the same housing as the ESP/950, I'm wondering how large are the drivers for the A/250 and A/200.
  14. obobskivich
    I think they're pretty normal, like 40-50mm, but I may be wrong.
  15. VitalB
    If they were it would be rather dissapointing. I wonder if anybody can post a picture of the A/250 and ESP/950 side by side.
    Also does anybody know any pairs of headphones that used or adapted from speaker drivers?

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