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Varèse
Mono DACs
The Varèse Music System
utilises a Mono DAC
configuration with a
dedicated DAC for each
audio channel (left and
right). This
configuration allows us
to deliver a number of
benefits — such as
improving the power
supplies within each DAC
and enhancing cross talk
performance.The Mono
DACs utilise our new
ACTUS and dCS Tomix
technologies to deliver
a superior sonic and
measured performance
with excellent local
clocking, bit-perfect
audio transmission and
total system control.
Each DAC features a
dedicated Differential
Ring DACTM system — a
new version of the dCS
Ring DAC that brings
improvements in noise
floor and linearity.
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Mono DAC Power Supplies
The Varèse Mono DACs
feature new, improved
hybrid power supplies
for enhanced
performance.
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The twin
transformers inside each
Mono DAC have been
optimised for analogue
and digital operations.
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Secondary
power supply circuits
have been redesigned to
reduce magnetostriction
in the transformer core
and the mechanical hum
this can create.
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Power
supply regulators
utilise a power
management chip to
achieve power sequencing
— bringing tighter and
more flexible control of
supply activation and
deactivation.
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Additional
regulation is provided
for the analogue
supplies serving the
balanced output stage,
allowing us to further
reduce common mode noise
at that output.
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Differential Ring DAC
The Differential Ring
DAC is a new iteration
of the dCS Ring DAC.
There is a Differential
Ring DAC inside each
Varèse Mono DAC.
The Differential Ring
DAC features 96 current
sources for each audio
channel. This means the
Varèse Mono DACs have
twice as many current
sources for each audio
channel as other dCS
DACs.
In the Varèse Mono
DACs, 48 current sources
produce the analogue
signal in the correct
phase and 48 produce the
same signal in antiphase.
The outputs of these two
sets of current sources
is differenced, meaning
the phase of the
antiphase current
sources is reversed and
summed together with the
correct phase current
sources. This makes the
Mono DACs inherently
balanced in several
areas, including
residual noise, power
supply draw summing node
DC offset.
The differential
design also improves on
harmonic performance and
allows us to further
increase linearity while
significantly lowering
noise floor. This, in
turn, brings significant
sonic benefits -
allowing us to once
again elevate the
musical experience we
provide.
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ACTUS
Audio
Control & Timing Unified
System
ACTUS is a bespoke
interface developed by
dCS to radically
simplify system setup
whilst ensuring ultimate
audio quality.
The ACTUS interface
delivers audio, control
and timing signals
between Varèse
components.
This enables the Varèse
Music System to be
connected with a single
cable running from each
unit to the Core.
dCS ACTUS cables
carry asynchronous and
error corrected digital
audio, control signals,
and a master clock
signal send via our
proprietary Tomix
interface.
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dCS Tomix
Tomix is a patented
clocking technology
developed by dCS
engineers.
Its creation allows
us to harness the sonic
benefits of a Mono DAC
arrangement within the
Varèse Music System
whilst maintaining the
strict standards we have
set for clocking
performance.
Tomix ensures the
clocks within each Mono
DAC are tightly
synchronised. This, in
turn, allows us to
ensure the left and
right channels of each
audio sample are
converted at exactly the
right moment, whilst
also making sure that
the Ring DAC operations
within each DAC are
tightly controlled via
the DAC’s internal clock
circuitry. |
