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Soulution 746+ SACD player

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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 analogue worlds. Production of this unique SACD-Player is limited to 20 units.


A CD or SACD player brings both digital and analog 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 analog 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. solution's approach is somewhat different. As with the other components we’ve engineered our own circuitry and used a consistent dual-mono layout throughout. Three separate power supplies – for drive, digital and analog stages – are moved to 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 24 bit /352.8 kHz (24 bit/384 kHz depending on the digital input signal) with the utmost precision. We believe the 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.

The 746 SACD-Player is equipped with the solution's innovative Zero-Phase-Technology. The 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°, 20 Hz – 100kHz! The Zero-Phase-Technology brings you even closer to the beauty of the source material! The 746 SACD-Player is equipped with the solution's innovative Zero-Phase-Technology. The 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 upsampling and filter functions are bypassed. 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 the best signal-to-noise performance and maximum dynamics in the analog domain.

Output stage
The 746’s extremely wideband output stage is identical to that of the 720 reference preamplifier, including the power supply. A 40 MHz/– 3 dB 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 minimum.

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 a 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 0.01 µV. 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+.


Mains 220 – 240 V / 50 – 60 Hz
Model 100 – 120 V / 50 - 60 Hz
Power consumption < 0.5 W standby
60 W device in operation

Main Out
Output voltage 4 VRMS balanced
2 VRMS unbalanced
Peak Output Current 1 A
Output impedance 2 Ω balanced
2 Ω unbalanced
Frequency response DC-100 kHz (depending on data format)
Distortion (THD) < 0.002%
Signal to noise ratio (SNR) 140 dB

Output voltage SPDIF
500 mV p-p
5 V p-p
Output impedance SPDIF
75 Ω
110 Ω
Frequency 32 – 192 kHz
Resolution 16 – 24 bit

Sensitivity 0.3 - 5 V p-p
Input impedance SPDIF
75 Ω
110 Ω
Frequency 32 -192 kHz
Resolution 16 – 24 bit
PLL – range +/- 100 ppm

Output voltage 5 V p-p
Output impedance 75 Ω
Clock-frequency (adjustable) 44.1 or 48 kHz

Input voltage 0.3 – 5 V p-p
Input impedance 75 oder 300 Ω
LINK-System + 12 V