Fostex HPA8C compatibility with integrated

Discussion in 'Dedicated Source Components' started by quantx, Dec 30, 2017.
  1. quantx
    I tested a Fostex HPA8C connected with an integrated amp.
    It's humming, so I suspect a conflict between Fostex preamp stage and integrated preamp stage.
    When testing the Fostex with an external preamp only, no problem.
    What do I miss here ?
  2. quantx
    Apparently a problem of ground related to integrated compatibility. Fostex is functioning perfectly with another preamp. Just a marriage problem…

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