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  1. HoppesBrain

    Adcom GFA-565 replacement circuit board

    Interesting idea. How would you do this? I can think of two ways.. 1. Feed one amp channel an inverted signal, say, from the cold output of a balanced preamp. 2. Feed a single-ended signal to both amp channels, but connect one in inverted mode by sending the signal to the negative side of the...
  2. HoppesBrain

    Adcom GFA-565 replacement circuit board

    I've been called a lot of things, but never a BOT :laughing9: No relation to the Hoppe's Gun Oil people, but I smell good too.
  3. HoppesBrain

    Adcom GFA-565 replacement circuit board

    Hi, Chris Hoppe of Hoppe's Brain here. I do actually have test results, in a blog post. I'll add them to the product page. https://hoppesbrain.com/2022/11/08/ebfa-565-versus-bfa-565-validating-a-new-design/
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