beside others in its design offers the following highlights:
independent dual-mono channel design:
R10 uses a fully independent dual mono design that isolates
each channel from the other. Therefore it comes with
separate power supplies for the two audio channels, and
additional, also completely separate supplies for the
control, display and communication circuitry in the
controlling section. In fact, there is a die cast aluminum
wall between the two channels in the pre-amplifier and all
sub-circuits separating Left from Right channels fully,
physically as well as electrically. The remarkable efforts
to preserve isolation between channels in the R10 deliver
superior imaging specificity and accuracy, creating a
vividly rich, three dimensional sonic image.
In addition to the isolation between channels, isolation
between inputs in the R10 perhaps is unsurpassed. By using a
discrete "T-switch" input switching along with special
shielding and board layout, the selected source effectively
has the preamplifier "all to itself" by effectively
"unplugging" inputs not being used. This design delivers
better than 120 dB separation between even adjacent input
connectors, ensuring that you hear only the source you
intend to hear, without even subtle contamination from other
active source components.
The unit is fully balanced from input to output. In fact,
even single-ended inputs are converted to balanced once upon
entering the preamp, and are handled in a balanced fashion
thereafter. The rigorous implementation of the balanced
circuitry conveys all of the information present in the
source signal to the power amplifier, without the
limitations of asymmetrical single-ended designs.
High precise volume control in 0.1dB steps with left and
right channel fine-synchronized:
Considering the volume control is one of the souls
especial also of pre-amplifiers, R10 employs a DUSSUN-developed
revolutionary volume precision and resolution system, with
0.1 dB-step volume control.
set up by a 16-bit performance,
digital controlled analogue circuit
98 surface-mounted, precision resistors per channel and 1/65,535
level superfine resolution within whole volume control
range from zero to maximum.
It delivers greater transparency than any volume control
technology we have ever experienced and also by providing
increments as small as 0.1 dB, allows you to select
precisely the correct volume for any given recording, and to
do so repeatedly. Local supply regulation and passive bypass
components are used to assure optimum results.
The machine includes two of main outputs per channel: one of
balanced outputs on high quality XLRs, and one of
single-ended outputs on RCA Jacks. The XLR and RCA outputs
are buffered independently of each other, and may be used
simultaneously without degrading performance.
Three power supplies divide the task of providing clean and
stable DC power to the various circuit elements. Common mode
and differential filtering capacitors are used on the AC
mains input to pre-filter high frequency noise.
All control and display circuitry are powered from a
separate, low-voltage DC supply. This approach also prevents
noise generated by control and display circuitry from
finding its way into the audio circuits.
and right channel audio circuits are powered by two
independent power supplies. Custom-designed R-type
transformers are used to reduce the AC main voltage properly
to that required for the audio supplies.
Independent rectification and filtering is followed by
active regulation for voltage gain and volume control
Separate power supplies for left and right channels ensure
that demand from one channel cannot modulate the power
supply of the adjacent channel. This dual-mono approach
results in the most effortless reproduction of dynamic
contrast as well as stable and detailed stereo imaging.
control & user interface:
A newly designed remote control unit complete operating
control functions in a small and elegant package. The user
interface is rooted in the advanced design of R10. Large
knobs for volume and input select help the unit retain the
tactile benefits and functionality of traditional
preamplifier designs. Of particular interest, inputs may be
named appropriately, and the selector knob cycles only
between those inputs. In this way the R10 can be operated as
if it were Custom-designed for each source component.
Regardless of the technology used, numerous details have to
match for fully realizing the potential of thisdesign. They,
such as quality of individual components, the care and
craftsmanship with which they are assembled and the
exhaustive inspection and testing employed help raise the
value of this product greatly.
control and pre-set functions, such as:
Individually pre-set gain level for all input terminals
Individually pre-set channel name for all input
Display screen brightness adjustable for 4 levels
Maximum volume pre-set to protect expensive loudspeakers
Fade-in volume when switching on
Aluminum full function remote control unit