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The soulution 746+
is the ultimate CD/SACD-Player for music lovers with highest
expectations regarding musicality and precision of the music
reproduction. The excellent 746 player unit gets comined with an
ultimate, much more powerful external power supply and thus forms
the 746+ SACD-Player. The anyway outstanding sonic qualities of the
746 player unit get emphasised even further. Much more than just a
CD/SACD player it bridges the gap between the digital and the
A CD or SACD player brings both digital and analogue domains
into an audio system. For the very highest quality sound every part
of the player is critical. A high-quality D/A converter alone is no
longer enough. The 746 unites a top quality optical drive, a super-precise
master clock generator, an intelligent digital signal processor with
oversampling, and analogue output stages of the utmost quality.
Together they ensure nothing in the music is lost on its way from
disc to output connection.
Look inside many CD/SACD players and you’ll find a lot of empty
space and off the shelf electronics. soulution’s approach is
somewhat different. As with our other components we’ve engineered
our own circuitry and used a consistent dual mono layout throughout.
Three separate power supplies - for drive, digital and analogue
stages - are moved offboard into an external housing, removing a
potential source of interference.
Drive quality is critical in a high-end player. For the 746 we
chose the Esoteric synchromesh drive from Teac. It is mounted to
massive copper chassis which are in turn affixed with damped
mountings for complete mechanical isolation.
Audio data from the disc is buffered. A powerful SHARC DSP
performs the 8x oversampling to 24bit /352.8 kHz (24bit/384kHz
depending on the digital input signal) with the utmost precision. We
believe precision of interpolation is more important than high
clock rates. Our players use an algorithm from the highly regarded
Anagram Technologies followed by Burr Brown D/A converters in a
digital symmetric configuration. For SACD only, conversion to PCM is
used prior to D/A conversion. The PCM format allows us to use
innovative processes like the Zero Phase Technology.
zero phase technology
The 746 SACD-Player is equipped with soulution's innovative Zero-Phase-Technology.
Smallest timing errors provoked by the analog low pass filter of the
D/A converter get eliminated. Every D/A-converter requires an analog
low pass filter in its output in order to suppress high frequency
noise and aliasing signals. The 3rd order bessel filter , used for
the 746 SACD-Player, with a cut-off frequency of 120kHz, does show a
phase shift of up to 15° in the audio band. Due to the Zero-Phase-Technology
the phase error of the analog music signal remains below 1°, 20Hz -
100kHz! The Zero-Phase-Technology brings you even closer to the
beauty of the source material! The 746 SACD-Player is equipped with
soulution's innovative Zero-Phase-Technology. Smallest timing errors
provoked by the analog low pass filter of the D/A converter get
eliminated. The music gets even more realistic and 3-dimensional
with a lot of "air" around instruments and voices. As close to the
source as possible! No detail gets lost.
D/A converter and output stage
Burr-Brown devices perform D/A conversion only. Their internal
upsamling and filter functions are by-passed. They run in dual-mono
mode. The four output currents are converted to voltage and then
filtered. With an internal bandwidth of 80 MHz, this current/voltage
conversion stage allows best signal-to-noise performance and maximum
dynamics in the analogue domain.
The 746‘s extremely wideband output stage is identical to that
of the 720 reference preamplifier, including the power supply. A
40MHz/-3dB bandwidth ensures every musical detail is reproduced true
to life producing a three-dimensional, spatial sound. Output signal
levels are enough to keep interconnect influences to an absolute
No less impressive is the master clock generator which provides
an ultra-precise clock signal. Residual jitter at below one
picosecond is effectively undetectable with current test equipment.
External power supply
The external power supply consists of three separate and
electrically isolated sections, all complemented by multi-state
filter network which keeps mutual interference across the three to
a minimum. Key to any good sounding audio component is a stable and
noise-free power supply - especially for the audio stages. For
powering the analog stages an innovative, amplifier-like circuit
design is used, providing an extremely stable supply voltage with
ripple levels below 0.01µV. With more than 500'000 µFarad of storage
capacitance it provides almost unlimited impulse current for the
analog circuits. Bus bars supply this power throughout the unit
without loss. A unique concept in the audio world, this allows the
same high quality supply to be delivered to all parts of the 746+.
Power supplies for the digital
and drive sections of the player are similarly highly specified and
optimized for their respective functions, including accommodating
any high current demands from the drive and its electronics.
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