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The
preamplifier F1 is the interface unit between digital source and
the power stage. A special feature of the F1 is a dual mono
configuration that allows complete independence of the channels.
Particular care has been taken in the design of power supply
section so as to minimize the harmonic content of voltage
supplying the preamplifier. F1 is born with the aim of achieving a
high quality audio playback. The control of the dynamics of the
input signal is takes through two independent sections. It has a
single stage, composed of unipolar devices (ultra low noise FET)
and bipolar transitors.
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Essential line
pramplifiers F1
“...the
detail is excellent and I think the grain is the finest
I have
heard from a solid state...”
(Giovanni
Aste - VideoHifi n°25, Hearing test)
“...liquid
and sweet...energetic in deep bass.”
(Paolo
Fontana – Fedeltà del suono, Set.2008, Hi-End Magazine)
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The particular circuitry
ensures high stability of the working point of these devices so as
to make it insensitive to drift of the current respect to
temperature drifting and the dispersion of the characteristics. It
was placed in care in selecting and sizing of the transistors of
the output stage so that the very low output impedance and its
insensitive in changing over the entire audio range, ensuring high
driving capability and speed. Basically F1 is a machine for
playing high-performance audio, guaranteeing a superb linearity.
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