Hi Paul - Congrats on the A65! Maybe I should reconsider an A20
then....
My reference to current mode control is in describing the type of
feedback they use in their circuits. Most linear amplifiers use voltage
mode control for the sake of simplicity, but current mode offers a few
technical benefits that are worthwhile for those willing to break with
convention. For one, it has lower impedance which reduces phase
shifts significantly. Another is that bandwidth and gain are
independent. This latter is important for me (and perhaps you too)
because the gain reduction knob on an Accuphase is a real one - not
a shedding resistor used to to drop the signal. This allows you to
truly lower the gain of the circuit to better mate with your preamp
without affecting transparency. There are very few amplifiers that
have this ability.
Arthur
