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In the Forum: Analog Playback
In the Thread: I need a “second-type” phonostage.
Post Subject: german currentsPosted by hagtech on: 6/2/2006
"self-matching input impedance "

Aren't they trying to say the input is grounded?  It sounds like they're using the current signal from cart, not voltage.  Like the 47 Labs stuff.  This concept has merit, but I never tried it.  To me, the magnet/coil generator concept works best when creating a voltage.  Same goes for speakers (in reverse).  Although you can drive speakers with a current amplifier.  They're just not designed for such.  Crossovers should be done in series (like a Fried).  Nelson Pass wrote an article in audioXpress discussing some experiments.  In the end, he had to put a parallel resistance across the amplifier to make it sound right.  Sort of right back to where we started (voltage source with some series resistance).

jh

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