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  1. capnjack
    For some reason they remind me of the RE-400's , it might be the packaging?
    capnjack, Jan 21, 2016
  2. airomjosh
    as always, excellent review. would you consider them an upgrade to KZ-HDS1?
    airomjosh, Feb 7, 2016
  3. HiFiChris
    [user=176741]@airomjosh[/user]    Yes, I'd consider the M4 as an upgrade from the HDS1, however a rather small one. That both have quite different tonalities should be taken into consideration as well, as the M4 is quite a lot brighter than the HDS1.
    HiFiChris, Feb 8, 2016
  4. airomjosh
    another quick question, are they sidegrade or upgrade from from re400?
    airomjosh, Feb 9, 2016
  5. HiFiChris
    [user=176741]@airomjosh[/user]    No idea, haven't heard the RE-400 myself yet.
    HiFiChris, Feb 10, 2016