Series 7

717 power amplifier

What a difference control makes!

soulution’s new reference power amplifier drives all loudspeakers and sets new benchmarks in terms of noise, phase errors, common mode rejection and distortion.

Key Features

Switched mode power supply (4 × 600 VA , 4x 2’100 VA peak)
Impulse current rating of more than 400 Ampere
Minimal phase change (<0.2° @ 20kHz) in audio band
Ultra low noise circuit < -165dBV (input related noisedensity)

Highlights

Layout
The 717 power-amplifier (including the power supplies) was designed to be entirely dual-mono in its layout. The left and right channels each have their own PCB and are thus completely separated from each other. This results in much better channel separation (> 130 dB) than with previous models.

Input stage
The innovative input stage of the717 power-amplifier enables exceptional common mode rejection without compromising the input stage by introducing noise. This is achieved with parallelized instrumentation amplifiers designed for wide bandwidth (20MHz), lowest noise and optimal common mode rejection (CMMR >105dB). This ensures that even the faintest musical signals can be properly received by the 717 power-amplifier.

Voltage stage
For all amplifier designs with negative feedback more loopgain is better than a lot, provided that the design remains stable. With its bandwidth of more than 2 MHz, a loopgain of more than 120dB (DC) and its ultra linear feedback network the 717 sets a new benchmark in terms of phase coherence and distortion.

Current stage
The current amplifier stage features 16 power transistors per channel working in Class AB. A smart bias current control circuit measures the instantaneous current of each single transistor and controls its idle current ensuring optimal and identical operating conditions. The 717 combines outstanding micro dynamics with impressive raw power delivery. Short current pulses of 400A and more are readily attainable. For safety reasons the continuous current output is limited to 32Arms per channel.

Power supply
Four ultra-high peak-power switched (2’100W for 5 sec.) mode power supply modules provide the power for the rail voltages of the output stage. The output impedance of the regulated supply remains ultralow over the relevant frequency range which renders big storage capacitors redundant. Distributed local power supplies, with highly efficient DC-DC converters and extremely low-noise and fast linear regulators right next to the sink, power the small signal section of the 717. This ensures lowest noise and shortest signal paths for the small signal section.

Specifications

Mains	100– 240 V (50 – 60 Hz)
Power consumption	< 0.5 W standby idle 300 W max 1600 W
Outputs	2 pairs Cu-terminal, gold plated
Gain	+ 26 dB
Power output	2 × 150 W @ 8 Ω 2 × 300 W @ 4 Ω 2 × 600 W @ 2 Ω
Pulse power	> 2 × 6000 W
Frequency response (– 3 dB)	0 – 2 MHz
Phase response (@20kHz)	< 0.2°
THD + N	< 0.001% at 50 W @ 4 Ω (20 Hz – 20 kHz)
Signal-to-noise ratio	108 dB (5 W @ 1 kHz)
Spot noise (input related)	< 165 dBV/sqrt(Hz), 20Hz - 20kHz
Channel separation	> 120 dB @ 1 kHz
Damping factor	> 10 000
Output current max	32 A (limited)
Inputs	2 × balanced (XLR)
Input impedance	4.4 MΩ balanced
Dimensions	480 × 350 × 505 mm (W × H × D)
Weight	approx. 50 kg
LINK (remote turn-on)	12 V control signal

soulution 787 turntable

What a difference accurate tracking makes!

787 soulution’s new linear tracking reference turntable, engineered for audiophiles who demand nothing less than perfection.

Highlights
The 787 turntable features linear tracking with a moving platter and a minimal excursion pivoted tonearm. The tracking error is thus reduced to max. < 0.15°. The 8” tonearm, also compatible with high compliance cartridges, is mounted on an isolated, resonance controlled sub-chassis. The platter slides laterally to keep the pivoted tonearm aligned with a linear tracking path. The 787’s architecture eliminates the friction and unbalanced forces inherent with linear tracking tonearms where the arm is pulled toward the inner grooves by lateral forces on the outer edge of the record’s groove. The 787 provides all the benefits of low friction pivoted tonearms, but without the issues of skating forces, tracking error, and alignment challenges of traditional pivoted tonearms.

Platter
The complete platter subassembly consisting of the platter, the sub-platter with a high precision low friction sintered magnetic bearing and the platter drive motor with precious metal brushes, slides laterally underneath the tonearm on polished axles and ensures that the tracking error remains minimal from the outermost to the innermost groove of the vinyl record.

Tonearm
The tonearm combines the merits of linear and pivoted tonearms and thus provides the best from both worlds. There are no tracking forces exerted on the tonearm neither are there any issues with skating forces or tracking errors etc. Ultra precise inductive proximity sensors monitor the tonearm position and control the motor for the lateral movement of the platter which ensures that the tracking error always remains below +/- 0.15°. The tonearm features precious metal alloy tonearm cables and is adjustable for VTA and azimuth. When the platter moves into parking position the tonarm swivels out for comfortable exchange of the vinyl record.

Power supply
A switched mode power supply with highly efficient DC-DC converters and extremely low-noise and fast linear regulators generate the voltages required for the operation of the 787 turntable.

Specifications

Mains	100– 240 V (50 – 60 Hz)
Power consumption	< 0.5 W standby, 10W in operation
Outputs	1 pair of RCA
Speed	33rpm, 45rpm
Dimensions	480 × 450× 250 mm (W × D × H)
Weight	approx. 36kg

757 deemphasis preamplifier

What a difference precision makes!

soulution’s new reference deemphasis preamplifier connects to all analog sources and sets new benchmarks in terms of noise, phase errors, common mode rejection and distortion.

Inputs for MM, MC, tape head

The innovative input stage of the 757 deemphasis preamplifier enables exceptional common mode rejection without compromising the input stage by introducing noise. This is achieved with parallelized instrumentation amplifiers designed for wide bandwidth (2MHz), lowest noise (noise density < -170 dBV/ ) and optimal common mode rejection (CMMR >100dB). This ensures that even the faintest musical signals can be properly received by the 757 deemphasis preamplifier. With its adjustable termination impedance the input can be adapted very precisely to your magnetic pickup system.
When configured as tape head input the 757 activates its tape head calibration network which allows to compensate for roll-offs induced by imperfections of the tape head.

Input for optical cartridges

One of the 757s inputs is dedicated to DS Audio’s optical cartridges. The 757 deemphasis preamplifier features a wideband transimpedance amplifier for optimal reception of the output signals (current) of the optical cartridges.

Gain control

High speed und ultra-low noise operational amplifiers together with relay-switched high precision metal foil resistors form an 80 step (1 dB) gain control unit. Each channel has its own gain control unit also allowing balance adjustment. To avoid unpleasant clicking noises or harmful voltage peaks during gain adjustments, the 757 deemphasis preamplifier is provided with a second gain control path which is active only during gain adjustments. This secondary, IC based gain control alters the gain without any click or pops. Once the new gain is set, the 757 will revert to the sonically superior path.

Deemphasis curves

The 757 provides a wide range of deemphasis curves.

Phono: RIAA, DECCA, COLUMBIA, LONDON, TELDEC, NARTB
Tape: IEC2-30ips, IEC1-15ips, IEC1-7.5ips, NAB-15ips

The use of very fast amplifier stages ensures highly accurate reproduction of the selected equalization curve (±0.05dB, 20Hz to 200kHz).

Output stage

The Class-A output stage has been optimised for speed, precision and high peak currents. Thanks to its low output resistance the output stage can drive even long cables without difficulty. With a frequency bandwidth of 20 MHz (-3 dB) and the accompanying minimal phase shift in the audio band, all details of the music are reproduced true to life. The result is a three-dimensional spatial sound experience full of musicality and natural timbres. The sheer power of the output stage guarantees that the rich detail of the music reaches your power amplifier.

Distributed Local Power Supply:

The basis for the dual mono power supply of the 757 deemphasis preamplifier is a switched mode power supply (SMPS) which converts mains voltage into an intermediate DC voltage. Highly efficient DC-DC converters and extremely low-noise and fast linear regulators generate the supply voltages needed to operate the 757 deemphasis preamplifier. Local linear regulators are placed next to each current sink (OpAmp, transistor, etc.). This ensures lowest noise levels on the analog supplies and shortest signal paths. Large filter capacitors, as typically used for linear power supplies with transformers and rectifiers, are no longer required.

Specifications

Mains	100 – 240 V (50 – 60 Hz)
Power consumption	< 0.5 W standby 60 W device in operation
Inputs	2 × MC, MM or tape head (RCA & XLR) 1 × DS audio optical (RCA)
Input impedance	MC: 10 Ω – 1000 Ω MM: 47 kΩ and 0 – 750 pF Tape head: 20 kΩ - 100 kΩ and 0 – 750 pF
Accuracy of deemphasis (20Hz – 200kHz)	±0.05 dB
Frequency response (– 3 dB to deemph)	0 – 2 MHz
THD	not measurable
Spot noise (input related)	< -170 dBV/√Hz
Common mode rejection ratio (CMRR)	>100 dB
Channel separation	>100 dB
Gain (max)	-40dB to +80dB for MC -40dB to +60dB for MM -40dB to +70dB for Tape -40dB to +120dB for Optical
Outputs	2 × balanced (XLR) 1 × unbalanced (RCA)
Output impedance	0.8 Ω balanced (XLR) 0.4 Ω unbalanced (RCA)
Output voltage max	16 V_pp balanced (XLR) 8 V_pp unbalanced (RCA)
Output current max.	0.5 A
Dimensions	480 × 167 × 450 mm (W × H × D)
Weight	approx. 30 kg
LINK (remote turn-on)	12 V control signal

soulution 727 preamplifier

What a difference noise makes!

soulution’s new reference preamplifier sets new benchmarks in terms of noise, phase errors, common mode rejection and distortion.

Input stage

The innovative input stage of the727 preamplifier enables exceptional common mode rejection without compromising the input stage by introducing noise. This is achieved with parallelized instrumentation amplifiers designed for wide bandwidth (20MHz), lowest noise (noise density < -160dBV/√Hz) and optimal common mode rejection (CMMR >105dB). This ensures that even the faintest musical signals can be properly received by the 727 preamplifier.

Volume control

Relay-switched high precision metal foil resistors form an 80 step (1 dB) volume control. Each channel has its own volume control resistor network. The volume control also allows balance adjustment. To avoid unpleasant clicking noises or harmful voltage peaks during volume adjustments, the 727 preamplifier is provided with a second volume control path which is active only during volume adjustments. This secondary, IC based volume control alters the volume without any click or pops. Once the new volume is set, the 727 will revert to the sonically superior path with its high-precision metal foil resistors.

Phono-preamplifier(optional)

Small and fine output signals, especially from MC cartridges, are received by an instrumentation amplifier optimised for lowest noise and highest common mode rejection. With its adjustable gain (+40 dB to +80 dB @ 1kHz) and termination impedance (20Ω to 1kΩ, 47kΩ, 0pF to 70pF) the phono input can be adapted very precisely to your pickup system. The use of very fast amplifier stages (-3dB @ 2MHz) ensures highly accurate reproduction of the RIAA equalization curve (frequency and phase response).

Output stage

Distributed Local Power Supply:

The basis for the dual mono power supply of the 727 preamplifier is a switched mode power supply (SMPS) which converts mains voltage into an intermediate DC voltage. Highly efficient DC-DC converters and extremely low-noise and fast linear regulators generate the supply voltages needed to operate the 727 preamplifier. Local linear regulators are placed next to each current sink (OpAmp, transistor, etc.). This ensures lowest noise levels on the analog supplies and shortest signal paths. Large filter capacitors, as typically used for linear power supplies with transformers and rectifiers, are no longer required.

Specifications

Mains	220 – 240V (50 – 60 Hz) 100 – 120V (50 – 60 Hz)
Power consumption	< 1W standby 60W device in operation
Inputs	3 × balanced (XLR) 2 × unbalanced (RCA) 1 × Phono (optional)
Input impedance	4.4MΩ balanced (XLR) 4.4MΩ unbalanced(RCA) 10 – 1000Ω or 47kΩ phono (adjustable)
Input voltage max.	9Vpp
Outputs	2 × balanced (XLR) 1 × unbalanced (RCA)
Output impedance	0.8Ω balanced (XLR) 0.4Ω unbalanced (RCA)
Output voltage max	14Vpp balanced (XLR) 7Vpp unbalanced (RCA)
Output current max.	0.5A limited by protection circuit
Frequency response (– 3 dB)	DC - 20MHz
Phaseshift (@20kHz)	< 0.2°
Signal-to-noise ratio (20Hz – 20kHz @1Vrms)	>120dB
Noise density (input related)	< -160dBV/sqrt(Hz)
THD+N	<-120dB
Common mode rejection ratio	>105dB
Channel separation	>130dB
Gain	+4dB balanced (XLR) -2dB unbalanced (RCA) +44dB to +84dB (phono)
Volume control range	0 to – 79 dB in 1 dB steps
Dimensions	480mm x 450mm x 167mm
Weight	28kg

soulution 701 mono amplifier

More power, more control and even lower distortion.
Supported by the new “switched mode” power supply technology the soulution 701 monoamplifier sets new standards in for uncompromising music reproduction and outclasses its predecessor the soulution 700 by far. Colossal power and breath taking performance. Never has an amplifier been so close to perfection, but at the same time the technology must be subordinate – and transparent – to the music. Letting you experience music in all its natural diversity and beauty.

Key features:

Audio grade “switched mode” power supply (4 × 600 VA )
More than 1,000,000 µFarad storage capacity in the power supply unit
Peak current rating of more than 120 Ampere
Impulse power rating > 12,000 Watt

Highlights

Philosophy
Two amplifier channels can be used either in mono-mode or in dual-mode. They work perfectly load stable and 100% level and phase accurate like in the soulution 711 with shortest signal paths and no excessive open loop gain as often associated with solid state amplification. The soulution 701 monoamplifier is an ultra-fast and ultra wideband design (2 MHz/– 3 dB) and provides peak current ratings that would never be possible with a tube design. The unique concept of the soulution 701 monoamplifier combines seemingly contradicting qualities. Precision, Velocity, Stability and Power. The soulution 701 is closest of all to this ideal. As monoblock design it is capable of up to 1,200 W of continuous power (into 4 Ω) and more than 12,000 W of transient power. More than enough to breathe new sonic life into even the most demanding, low-efficiency loudspeakers.

Layout
To deliver these impressive power levels we have used bridged amplifiers. Optimized mechanical construction ensures both amplifier circuits are perfectly balanced, sharing identical thermal conditions and ideal grounding. When no music is playing an intelligent control system automatically lowers the quiescent current. And when loudspeakers dictate bi-amping, the soulution 701 monoamplifier can be easily switched to this mode. We think of it as tailor-made amplification.

Power supply
The new power supply of the soulution 701 monoamplifier is based on audio grade “switched mode” modules. Four units with 600VA each combined with highend storage capacitors (> 1,000,000 µFarad) provide enough power reserves that allow the 701s reproduce even very complex music signals with ease. Circuitry that does not process audio signals should not be able to influence them. That’s why we use dedicated power supplies within each monoamplifier for the ancillary stages.

Connectors and start-options
The monoamplifier 701 does have balanced and unbalanced inputs. With the balanced connection the input signal can be bypassed to another amplifier. Switches at the back of the amplifier allow to define the start options for the brightness of the display, the start-condition of the amplifier and the operation mode (mono or bi-amping).

Specifications

Mains	220 – 240 V (50 – 60 Hz) 100 – 120 V (50 – 60 Hz)
Power consumption	< 0.5 W standby idle 300 W / 200 W max 1600 W
Outputs	2 pairs Cu-terminal, gold plated
Gain	Dual: Mono:	+ 26 dB + 32 dB
Power output	600 W @ 8 Ω (2 × 150 W) 1200 W @ 4 Ω (2 × 300 W) 2000 W @ 2 Ω (2 × 600 W) in dual mode
Pulse power	> 12,000 W
Frequency response (– 3 dB)	0 – 2 MHz (0 – 1 MHz) in dual mode
THD + N	< 0.0003% at 50 W @ 4 Ω (20 Hz – 20 kHz)
IM distortions	< 0.005% SMPTE < 0.0006 CCIR
Signal-to-noise ratio	108 dB (5 W @ 1 kHz)
Damping factor	> 10 000
Output current max	120 A (limited)
Inputs	1 × balanced (XLR) 1 × unbalanced (RCA)
Input impedance	2.3 kΩ balanced (XLR) 4.0 kΩ unbalanced (RCA)
Dimensions	560 × 306 × 585 mm (W × H × D)
Weight	approx. 75 kg
LINK (remote turn-on)	12 V control signal

soulution 711 stereo amplifier

Higher precision, even more stability and velocity…
… than already has been achieved with the soulution 710 stereoamplifier, seems to be impossible. Still, the new soulution 711 significantly outperforms its predecessor in all disciplines! The new “switched mode” power supply technology brings the soulution 711 to new level of performance. Improvements on the test bench get confirmed by the performance in the listening room. Words alone cannot convey the performance and sheer acoustic presence of the soulution 711 stereoamplifier. We’ve combined the ultimate technical specification and highest possible performance with just one aim – to liberate the best the music has to offer. Listen like never before. Marvel. Enjoy. Without limits.

Key Features

Audio grade “Switched Mode” power supply (4 × 600 VA )
More than 1,000,000 µFarad storage capacity in the power supply unit
Peak current rating of more than 120 Ampere
Impulse power rating > 6’000 Watt

Highlights

Philosophy
The ideal amplifier is perfectly load stable, 100% level and phase accurate, and has no long signal paths. It should not use tricks like over amplification and very high negative feedback to achieve good results in the lab but poor sonic performance in the listening room. The soulution 711 stereoamplifier combines extreme speed with an ultra-wide bandwidth (1 MHz/– 3 dB) and a high current capability far beyond that of valves and output transformers. A unique and sophisticated circuit design opens up sonic qualities once considered incompatible: Precision, Velocity, Stability and Power. In the soulution 711 they are brought together for the first time – all in the pursuit of musical perfection. The soulution 711 is closest of all to this ideal. It can provide up to 300 Watt continuous power into 4 Ω and more than 6,000 Watt transient power per channel. More than enough to breathe new sonic life into even the most demanding, low-efficiency loudspeakers.

Layout
Throughout, the soulution 710 is designed as a consistent dual-mono layout. Both left and right channels feature identical audio amplifiers, each with its own high efficiency power supply. The housing forms an integral part of the design providing cooling for the output stages and damping to minimize microphonic interference.

Amplifier
From the input the soulution 711 first buffers the music signal. A high performance correction amplifier is then used to capture and correct any deviations in the signal, very quickly and very precisely. Ultra wideband amplification using no feedback loops follows, a less than 10 nanosecond transit time and level accuracy to within 0.1 dB ensuring signal purity. The whole is housed within a sealed module, maintaining a common temperature across all stages to further guarantee precision. The output stage comprises 14 power transistors per channel, all mounted onto a massive copper rail which is temperature controlled for a constant quiescent current. The soulution 711’s impressive low level signal handling is reflected in its raw power delivery. Current levels of 120 A and more are readily attainable.

Power supply
A stable supply voltage is key to a good sounding amplifier. The new power supply of the soulution 711 stereoamplifier is based on audio grade “switched mode” modules. Four units with 600VA each combined with highend storage capacitors (> 1,000,000 microFarad) provide enough power reserves that allow the 711s reproduce even very complex music signals with ease. Circuitry that does not process audio signals should not be able to influence them. That’s why we use dedicated power supplies for the ancillary stages.

Operation
Power, mode and input functions are operated from front panel buttons. Power toggles between on and off states. Mode transfers control of turn-on to an associated preamplifier via soulution’s LINK system. Input selects the desired input and mutes the others. The front panel display indicates operating status. Comprehensive built-in protection ensures safe operation and long life. This includes a level limiter (soft clipping) as well as over current and overheat protection.

Connectors and start-options
The stereoamplifier 711 does have balanced and unbalanced inputs. Switches at the back of the amplifier allow to define the start options for the brightness of the display, the start-condition of the amplifier and the operation mode (mono or bi-amping).

Specifications

Mains	220 – 240 V (50 – 60 Hz) 100 – 120 V (50 – 60 Hz)
Power consumption	< 0.5 W standby idle 300 W max 1600 W
Outputs	2 pairs Cu-terminal, gold plated
Gain	+ 26 dB
Power output	2 × 150 W @ 8 Ω 2 × 300 W @ 4 Ω 2 × 600 W @ 2 Ω
Pulse power	> 2 × 6000 W
Frequency response (– 3 dB)	0 – 1 MHz
THD + N	< 0.001% at 50 W @ 4 Ω (20 Hz – 20 kHz)
IM distortions	< 0.005% SMPTE < 0.0006 CCIR
Signal-to-noise ratio	108 dB (5 W @ 1 kHz)
Channel separation	> 120 dB @ 1 kHz
Damping factor	> 10 000
Output current max	120 A (limited)
Inputs	1 × balanced (XLR) 1 × unbalanced (RCA)
Input impedance	4.8 kΩ balanced (XLR) 10 kΩ unbalanced (RCA)
Dimensions	480 × 280 × 535 mm (W × H × D)
Weight	approx. 65 kg
LINK (remote turn-on)	12 V control signal

soulution 725 preamplifier

Due to the new power supply technology the 725 preamplifier has an even more breathtaking three-dimensional sound quality than its predecessor the 720 already did. Unsurpassed wealth of detail. Incredible punch at low frequencies. Distortions and noise could be reduced even further. The preamplifier is the command centre of your high fidelity chain. In tests its sound quality has proved to be second to none.

New power supply technology
The 725’s totally redesigned power supply unit works even more precise and regulates more precise and faster than the power supply of the 720. With more than 500,000 µFarad of storage capacitance it provides almost unlimited impulse current for the analog circuits.

Highlights

Philosophy
A perfect preamplifier shows consistent level and phase performance regardless of load. At soulution we stick to this ideal without resorting to often-used compromises like high amplification with high negative feedback. The result: virtually no distortion, hum or noise, maximum channel separation and impressive bandwidth (up to 1 MHz/– 3 dB).

Design
As few components in the signal path as possible and a dual-mono layout with discrete left and right channels maximise audio purity and virtually eliminate crosstalk. Input selection (including the ground connection) is by high-grade relay. And input buffering ensures the 725 presents a benign load to source components.

Input levelling permits different source device levels to be accommodated. All inputs are monitored continually for residual DC with audiophile-grade blocking capacitors automatically switching in and out when required. In this way maximum operational safety is guaranteed. As a further safeguard the front panel display indicates when DC is present.

Volume control
The volume control uses high-precision, low-noise metal foil resistors, and controls both volume and balance. To block switching peaks during volume changes which may be hazardous to power amplifiers a second volume control with PGA (Programmable Gain Amplifier) is used. Active only when the volume is changed, it is similar to a potentiometer and enables the volume to be adjusted in smooth steps without clicks. As soon as the new desired level has been selected, the unit returns control to the precision resistors.

Output stage
Able to drive even long interconnects, the 725’s multi-stage signal amplification is similar to that of the 711 power amplifier. In most cases levels can be maintained with no further amplification of the audio signal.

The optimised circuitry is based on special power transistors which are further linearized by an analogue computing network. In this way a very fast, very precise and ultra wideband (2 MHz/– 3 dB) performance can be achieved.

Phono MC preamp optional)
Designing and building the ideal phono stage is an exacting challenge. It must provide up to 80dB gain – equivalent to raising the signal level by 10,000 – yet must exhibit level and phase true behaviour while adhering strictly to RIAA-IEC equalisation standards. In the 725 this goal is realised with an ultra wideband (1 MHz/– 3 dB) multi-stage amplifier built around the very highest quality components.

Power supply
Key to a good sounding amplifier is a stable, noise-free power supply – especially for the audio stages. The 725 is equipped with two dedicated power supplies: one for the audio stages and one for the digital circuits. For powering the audio stages an innovative, amplifier-like circuit design is used, providing an extremely stable supply voltage. The 725’s totally redesigned analog power supply unit works even more precise and regulates more precise and faster than the power supply of the 720.

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 725.

Operation
Operation of the 725 is through three buttons and a rotary control on the front panel. All operating modes are indicated on the clear display. Additionally there are many other functions which can be used to optimise and match an entire audio system around different components.

Specifications

Mains	220 – 240 V (50 – 60 Hz) 100 – 120 V (50 – 60 Hz)
Power consumption	< 0.5 W standby 60 W device in operation
Inputs	2 × balanced (XLR) 3 × unbalanced (RCA) 1 × Phono-MC (optional)
Input impedance	2 kΩ balanced (XLR) 47 kΩ unbalanced(RCA) 10 – 1000 Ω (adjustable)
Outputs	1 × balanced (XLR) 1 × unbalanced (RCA)
Frequency response (– 3 dB)	0 – 1 MHz
THD + N	< 0.00009% (20 Hz – 20 kHz)
Signal-to-noise ratio	> 140 dB
Channel separation	> 110 dB
Gain	+ 9.5 dB balanced (XLR) + 3.5 dB unbalanced (RCA) + 54/60 dB Phono-MC unbalanced (optional) plus gain adaption + 3/+ 6/+ 9 dB
Volume control range	0 to – 79 dB in 1 dB steps
Output impedance	2 Ω balanced (XLR) 2 Ω unbalanced (RCA)
Output voltage	16 V_RMS balanced (XLR) 8 V_RMS unbalanced (RCA)
Output current max	1 A (limited by protection circuit)
Dimensions	480 × 167 × 450 mm
Weight	approx. 30 kg
LINK (remote turn-on)	12 V control signal

soulution 746+ SACD player

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.

Highlights

Philosophy
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.

Design
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.

Transport
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.

Upsampling
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 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.

zeroφtech
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°, 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 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.

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.

Clock
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 0.01 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+.

Specifications

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 V_RMS balanced 2 V_RMS 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
Digital-Out
Output voltage	SPDIF AES/EBU X	500 mV p-p 5 V p-p
Output impedance	SPDIF AES/EBU	75 Ω 110 Ω
Frequency	32 – 192 kHz
Resolution	16 – 24 bit
Digital-In
Sensitivity	0.3 - 5 V p-p
Input impedance	SPDIF AES/EBU	75 Ω 110 Ω
Frequency	32 -192 kHz
Resolution	16 – 24 bit
PLL – range	+/- 100 ppm
Clock-Output
Output voltage	5 V p-p
Output impedance	75 Ω
Clock-frequency (adjustable)	44.1 or 48 kHz
Clock-Input
Input voltage	0.3 – 5 V p-p
Input impedance	75 oder 300 Ω
LINK-System	+ 12 V