Then, it true “Bugatti fashion”, each and every amplifier is assembled by
the master or his sins — either Andreas or Alessandros Metaxas.
The individually 5-axis CNC’d “sculptural” enclosure presents a very
heavy, solid, inert, non-resonant structure to RFI shield and ultimately
protect the delicate electronic signals, driving the noise floor to
ultra-ultra-low levels, revealing a wealth of detail that has never been
heard before.
1. INPUT STAGE:
The fully complementary, dual dierential, cascaded input stage is lin-
earised to ensure least distortion over the large volt-age swings to the
amplifier input from the preceeding preamplifier. A very gradual (6dB/
octave) Bessel filter is incorporated at the input to eliminate the needless
reproduction of Radio Frequencies.The second voltage gain stage uses
considerable local feedback to ensure that large voltage swings from
the input stage are accommodated with the least possible distortion. An
overall negative feedback of only 11dB is required to stabilise the
complete D.C. operating point and reduce distortion at full power to
below 0.01% T.H.D. which is primarily composed of second harmonics.
A D.C. servo is built around an integrated circuit to monitor the output
voltage and ensure absolute D.C. stability at all times.
2. OUTPUT STAGE:
Our triple Darlington output stage uses the fastest power transistors that
were previously available, but no longer available since the factory in
Japan was destroyed by a Tsunami. Fortunately, we purchased large
stocks of these devices 30 years ago.
Our printed circuit design borrows techniques from RF and UHF
groundplane technology to maximise the speed of current delivery,
especially at high frequencies. from the ultra high-speed (fT’s 150 MHz)
power transistors.
