1. zodiac1234

    An all triode Class A amp Review: GPinto GP-H2A

    Hi folks! There is a newcomer in town:     An All Triode, Pure Class A, Transformer-Coupled Headphone Amplifier from Italy.       I had the opportunity to thoroughly listen to the unit and I would like to share my impressions here.     There is not any serious...
  2. iim7V7IM7

    Tube amp for Sennheiser HD800s: deciding between some SE & balanced options

    Gear: DAC: Grace Design m903 Tube Amp: ? Headphones: Sennheiser HD800 Single Ended Candidates: DNA Sonett 2 Eddie Current Zana Deux SE Woo Audio WA2 Other? Balanced Candidates: DNA Stratus Eddie Current Super 7 Woo Audio WA22 Other? Amp Criteria: maximize bass performance, sonic...
  3. GPinto GP-H2A

    GPinto GP-H2A

    L 'H2A is a headphone amplifier, built with vacuum tube technology. The circuit uses four double triodes (ECC82/12AU7): the first triode is used as a voltage amplifier, the second triode is utillizato as a phase inverter and driver of the final stage. The last two triodes are current amplifiers...