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Fully Balanced HP AMP with CFA topology

Discussion in 'DIY' started by Watchara, Oct 21, 2021.

  1. Watchara

    Watchara Acquaintance

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    A new project of Dual Mono Fully Balanced Headphone Amp. Inspiration from the Front End of SONY VFET PART 2 & PASS HPA articale amd modified to Double Complementary (SUSY)

    A part is used per channel :

    2x 2SK170BL, 2SJ74BL CFA PAIRS
    2x 2SA1837, 2SC4783 CASCODE
    2x 2SK2013, 2SJ313 OUTPUT
    2x 2SK2013, 2SJ313 OUTPUT BUFFER

    Simplify of circuit was Current feedback topology with opto biased and DC servo with Opto control.
    But I have no idea for their power supply until now, maybe next year it shall complete with internal Discrete R2R DAC inside.
     
    Last edited: Oct 22, 2021
    Watchara, Oct 21, 2021
    #1
  2. Watchara

    Watchara Acquaintance

    Joined:
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    My prototype.
     
    Watchara, Oct 22, 2021
    #2

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