Dynamics. Resolution. Control. Musicality.
All as close to perfection as possible. It’s what characterizes a top class preamplifier. The soulution 520 meets these challenges and more.

With four line inputs and a high quality phono stage built in, the soulution 520 is perfectly equipped for all audiophile requirements.

Highlights

Philosophy
A preamplifier should only amplify or attenuate the music signal, not change it in any way, while meeting the highest technical specifications. No distortion, no hum or noise, at the same time achieving the lowest cross talk and widest bandwidth. The soulution 520 preamplifier elegantly meets these demands and is a benign load for any source component.

Design
Unbalanced design ensures the fewest components in the signal path. Physical separation of the left and right channel provides optimal separation and cross talk performance. High quality relays switch between the inputs. Source signals are buffered directly at the input. For safety, an audio grade coupling capacitor protects the preamplifier as well as downstream amplifiers and loudspeakers from potential DC components in source signals.

Volume control
The 520’s volume control uses only high-precision, low-noise metal foil resistors, and it controls both the volume and balance. To block switching peaks during volume changes which may be hazardous to power amplifiers, the 520 is equipped with a second volume control with a PGA (Programmable Gain Amplifier). Active only during the volume control process, it is similar to a potentiometer and enables the volume to be adjusted in smooth, click-free steps. As soon as the new desired level value has been selected, the unit returns control to the precision resistors.

Output stage
Multi-stage, similar to that used in the reference 720 preamplifier, it achieves very fast, ultra wideband (1MHz/-3dB) amplification and is able to drive the longest interconnects with ease.

Phono-MC-Preamplifier
Similar to the 720, the phono preamplifier of the 520 is also multi-stage using the highest grade components.

Operation
The 520 is operated via its front-panel buttons and rotary control. Multi-functional, these allow optimisation of the entire audio system, and an ideal set-up of the individual components.

Specifications

Small package – big performance.
Pure music in all its diversity and natural beauty. An enchanting audio experience for all. Hear it for yourself and be convinced.

Highlights

Philosophy
The 501 mono amplifier embodies many of the same technology insights and advances of the Series 7 to deliver an outstanding performance in its own right.

Amplification
The amplification circuit of the 501 is based on the technology of the 710 and 700 amplifiers. At its core is a proprietary voltage amplification stage that consists of linearized amplifiers operating up to a cutoff frequency of 80 MHz.

Current amplification is done in three stages, each using a very small and thus almost linear operating range. The high Class A operation supplemented by 47,000µF of storage capacitance results in a nearly infinite impulse response. Massive copper bars on the amplifier board and to the speaker terminals ensure that all the power of the 501 mono amplifier is available to drive the speaker.

High-precision idle current management ensures optimal Class A operation for all conditions, without requiring any readjustment in the music signal. Optimal sound is thereby guaranteed immediately from switch on. Control circuits that protect against RF or DC signals at the input, and short circuits at the output ensure safe operation in all situations. The input level is also monitored continuously.

Power supply
A total of six power supplies – optimized for each function – feed the 501 mono amplifier. Those supplying the digital and audio circuits are electrically isolated from each other by optocouplers and transformers. Two cutting-edge switched-mode power supplies deliver 1,200W of audiophile quality power. They feature high performance filtering at the input and output, and six high speed soulution voltage regulators to deliver considerably more stable power than any conventional, transformer-based technology.

Operation
The 501 mono amplifier is operated via a rotary control on the front panel. It can be switched on remotely with other soulution devices via the LINK system.

Specifications

Precision, stability and velocity…
… just a razor-thin fraction behind our reference designs of Series 7, this was the design goal we have set for the 511 stereo amplifier. The 511 is equipped with the same “switched-mode” power supply technology, optimized for audiophile applications, as our series7 products. Additionally it is optimized for shortest “signal paths” for the music signal but as well for shortest paths and optimal flow of the current supplying the amplifier stages. Get inspired by the uncompromising music playback and enjoy the diversity and natural beauty of the music. A sound experience, of which everyone will be enchanted. Convince yourself.

Key Features

• “Switched-mode” power supply (4 x 600 VA) optimized for use in audio amplifiers
• more than 500’000 µFarad of storage capacitance in the power supply
• Peak current rating of more than 60 A
• versatile: stereo-, mono- und dual-mode
• Impulse power rating > 3’000 Watt (stereo/dual), > 6’000 Watt (mono)

Highlights

Operating modes
The 511 stereo-amplifier can be used in three different setups:

• Stereo-mode: 140 W @ 8 Ω, 280W @ 4 Ω, 560W @ 2 Ω per channel
• Dual-mode: 140 W @ 8 Ω, 280W @ 4 Ω, 560W @ 2 Ω per channel
• Mono-mode: 560 W @ 8 Ω, 1’120 W @ 4 Ω, 2’000 W @ 2 Ω

The operating mode can be changed in the menu functions of the 511 stereo amplifier.

Amplification
The amplification circuit similar to the technology used for the 711 and 701 amplifiers. At its core is a proprietary voltage amplification stage that consists of linearized amplifiers operating up to a cut-off frequency of 80 MHz. Current amplification is done in three stages, each using a very small and thus almost linear operating range. The high Class A operation supplemented by 500,000 µF of storage capacitance in the power supply results in a nearly infinite impulse response. Massive copper bars on the amplifier board and to the speaker terminals ensure that all the power of the 511 stereo amplifier is available to drive the speaker. This ensures the 511 does not get the plaything of the  loudspeakers, but controls them with the appropriate precision, power and velocity asked for by the music signal. High-precision idle current management ensures optimal Class A operation for all conditions, without requiring any readjustment in the music signal. Optimal sound is thereby guaranteed immediately from switch on.

Power supply
A total of 10 power supplies – optimized for each function – feed the 511 stereo amplifier. Circuitry that does not process audio signals should not be able to influence them. Therefore those supplying the digital and audio circuits are electrically isolated from each other by optocouplers. Four cutting-edge switched-mode power supplies combined with more than 500’000 µFarad of storage capacitance deliver 2,400W of audiophile quality power. They feature high performance filtering at the input and output, and six linear, high speed, ultra low noise voltage regulators to deliver considerably more stable power than any conventional, transformer-based technology.

Safety
Control circuits that protect the 511 stereo amplifier against RF or DC signals at the input, and short circuits at the output ensure safe operation in all situations. The input level is also monitored continuously. In case a malfunction is detected the 511 stereo-amplifier is muted and will automatically power down.

Operation
The 511 stereo amplifier is operated via push buttons and a rotary control on the front panel. It can be switched on remotely with other soulution devices via the LINK system.

Specifications

Uniting source components with power amplifiers, it must perform the critical functions of impedance matching, level balancing and volume control while maintaining perfect signal accuracy and channel integrity. Adding nothing. Taking nothing away.

While the perfect preamplifier continues to be a technical challenge for audio designers, we believe the 525 gets closest to the ideal.

Perfect volume control
The 525 owes much to the design of the range-topping soulution 725 Preamplifier. It uses the same volume control which ingeniously combines the smooth fingertip control of variable resistors with the precision and stability of fixed resistor networks. For the 525 we’ve chosen the best performing Vishay Dale resistors with relays of the utmost quality. The end result is volume control that is finely adjustable in 95 steps of 1 dB each, with no perceptible switching clicks. Truly the best of both worlds.

Advanced Switching
Input selection too uses very high-quality relays. The design – which switches ground as well as signal connections – ensures that only the selected input is connected through to the 525 electronics, the remainder being isolated. By buffering all signals immediately after the input, the 525 presents only a minimal load to source devices. Both balanced and unbalanced inputs are available.

Dual-mono construction
As few components as possible in the signal path speak for an unbalanced circuit concept. In this case, the lowest possible stereo conversations can only be achieved with a consequent dual-mono design. The analogue circuits and the associated power supplies of the left and right channels are physically separated from one another and are additionally decoupled with filter networks.

Level and phase correct with all loads
An ideal preamplifier like the 525 maintains perfect level accuracy and phase accuracy regardless of load. But measured values are only part of the story. Ultimate sound quality should always be the first priority. At no time should distortion, noise or hum be allowed to colour the music.

Perfect power
In order to drive the longest of signal cables, the output stage of a preamplifier must be sufficiently power­ful to do the job. The 525 employs a powerful, very fast and ultra-wide (2 MHz/– 3 dB) output stage that can drive long cables with ease. We team that with a similarly robust, high specification switched-mode power supply which features high-precision and extremely low-noise linear control circuits. Backed by more than 400,000 μF of storage, the power supply of the 525 provides virtually unlimited pulse power with indiscern­ible levels of noise.

Audiophile transparency
Musical transparency is pre-eminent in the 525. Colouration is simply not a factor. Control too is at the 525’s heart: stereo imaging precision is exemplary while sound sources appear perfectly focused on the sound stage. Once you audition the 525 you will come to understand the true nature of sound and the importance of the right preamplifier in achieving it.

Specifications

Mains	220 – 240 V (50 – 60 Hz) 100 – 120 V (50 – 60 Hz)
Power consumption	< 0.5 W standby 100 W device in operation
Inputs	2 × balanced (XLR) 2 × unbalanced (RCA)
Input Impedance	XLR: RCA:	820 kΩ 47 kΩ
Outputs	1 × balanced (XLR) 1 × unbalanced (RCA)
Frequency response (– 3 dB)	0 – 2 MHz
THD + N	< 0.00009% (20 Hz – 20 kHz)
Signal-to-noise ration	120 dB
Channel separation	130 dB @ 1 kHz
Gain max	+ 15 dB
Volume control range	+ 15 DB to – 79 dB in 1 dB steps
Output impedance	10 Ω balanced (XLR) 10 Ω unbalanced (RCA)
Output voltage	16 VRMS balanced (XLR) 8 VRMS unbalanced (RCA)
Output current max	0.2 A (limited)
Dimensions	442 × 143 × 448 mm (W × H × D)
Weight	approx. 20 kg
LINK (remote turn-on)	12 V control signal

An uncompromising preamplifier and an uncompromising power amplifier, both of reference quality, combined in one housing. That is the way we at soulution understand the concept of an integrated amplifier. Enjoy the purity and power this music machine is able to deliver.

Highlights

Philosophy
Most integrated amplifiers combine the functions of volume control, source selection and amplification in single multi-function circuit.

Not so the soulution 530 Integrated amplifier. It takes the uncompromising route of separate circuits, combining a dedicated reference quality preamplifier, and a dedicated reference quality power amplifier in one housing.

It is a real soulution product – truly a great amplifier.

Design
The audio section of the 530 is physically separated from the power supply and digital circuits. In order to reduce interferences to a minimum, these sections are additionally shielded. The power amplifier section is executed in dual-mono layout. The left and right audio channels have their own respective identical boards to deliver a channel separation of >110dB for a three dimensional sound stage.

Amplification
The amplification circuit of the 530 is based on the technology of the 710 and 700 amplifiers. At its core is an innovative voltage amplification stage that consists of linearized amplifiers operating up to a cutoff frequency of 80MHz.

Current amplification is done in three stages, each with a narrow, almost linear operating range. The high Class A operation supplemented by 47,000µF of storage capacitance results in a nearly infinite impulse response. Massive copper bars on the amplifier board and to the speaker terminals ensure that all the power of the 530 is available to drive the speaker.

High-precision idle current management ensures optimal Class A operation for all conditions, without requiring any readjustment in the music signal. Optimal sound is thereby guaranteed immediately from switch on. Control circuits that protect against RF or DC signals at the input, and short circuits at the output ensure safe operation in all situations. The input level is also monitored continuously.

Power supply
A total of nine power supplies – optimized for each function – feed the 530 integrated amplifier. Those supplying the digital and audio circuits are electrically isolated from each other by optocouplers and transformers. Four cutting-edge switched-mode power supplies deliver 2,400W of audiophile quality power. They feature high performance filtering at the input and output, and six high speed soulution voltage regulators to deliver considerably more stable power than any conventional, transformer-based technology.

Volume control
The 530’s volume control uses only high-precision, low-noise metal foil resistors, and it controls both the volume and balance. To block switching peaks during volume changes which may be hazardous to power amps, the 530 is equipped with a second volume control with PGA (Programmable Gain Amplifier). Active only during the volume control process, it is similar to a potentiometer and enables the volume to be adjusted smoothly without clicks. As soon as the new desired level value has been selected, the unit returns control to the precision resistors.

Pre-Out
The soulution 530 integrated amplifier is equipped with pre-out connections which enable subwoofers, tape recorders or other amplifiers to be driven directly by the 530’s preamplifier section, by-passing the power amplifier section.

Surround mode
Surround mode allows users to optimally integrate the 530 with AV systems. In surround mode, the input signal by-passes the preamplifier section without any adjustment for volume or balance .

Operation
The 530 integrated amplifier is operated via its three front panel buttons and rotary control. Multi-functional, these allow optimisation of the entire audio system, and an ideal set-up of the individual components. All operating modes are indicated on the clear display.

Specifications

While the world of recorded music formats continues its seemingly inexorable change, with CDs and SACDs giving way to server-based storage, USB and network interfaces, one format – that of the vinyl record – continues to be highly popular. Indeed, vinyl, the medium that 20 years ago was said to be dead, has lost none of its appeal and is today enjoying a revival thanks to an ever-growing fan base.

80 dB gain without distortion
The phono stage with RIAA equalisation required for vinyl playback presents the designer with a formidable technical challenge if it is to correctly and transpar­ently handle the signal from low output moving coil cartridges. Delivering a gain of up to 80 dB (10,000 times) while remaining linear and phase-correct, the amplifier must have an ultra-wide bandwidth, (internal bandwidth 1 MHz/– 3 dB) minimal distortion, optimal channel separation and maximum linearity.

Dual-mono construction
The 550 Phono features unbalanced dual-mono construction with separate power supplies for the left and right channel, guaranteeing the least possible channel crosstalk. Both inputs of the 550 can be configured for moving magnet or moving coil cartridges, with load impedance selectable via the front panel or the remote control for each input individually. A switchable < 20 Hz rumble filter protects loudspeaker cones from potentially damaging long excursions caused by warped records.

Musicality and refinement with no limits
Noise and distortion have no place in vinyl playback, despite the challenges implicit in amplifying such low signal levels. Only then can the full potential of the medium be heard. The richness of sound colours, the dynamism, the refinement. Heard through the 550 Phono, well-produced vinyl shows why for many it is still the medium to beat, unrivalled in its ability to convey emotion and musicality.

Preamplifier grade output stage
If nothing is to be lost at the source of music, then the power supply and the output stage of a phono preamplifier have to be of the highest quality. For the 550 Phono soulution uses identical power supplies and output stages to those employed in the 520 Preamplifier. Optimized for speed and precision the 550 Phono can drive any cable.

Specifications

No deletions at the source are mandatory. This holds even more true for the playback of high resolution files as it did for CDs and SACDs anyhow. No amplifier or loud­speaker can ever make good for what has been lost at the source. The quality of the recording and the signal supplier are of fundamental importance in high fidelity.

The 560 D/A-Converter does excell at exactly this task. It captures all digital music data and transports it in the analog domain. No deletions, no additions!

Highlights

Philosophy
In many areas the 560 D/A-Converter is based on the same proven technical solutions used in the 745 SACD-Player. It also embodies the same principles in its design: top grade digital inter­faces for optimal reception of the music data, a super-precise master clock generator to avoid jitter, intelligent digital signal processing with over­sampling technology, and analogue output stages of top end pre­amplifier quality.

Design
As with its Series 7 sibling the 560 D/A-Converter is packed with cutting-edge tech­nology with one objective – the love of music. The parallels include a consistent dual mono design in the output stages and separate power supplies for digital elec­tronics and the analogue stages. The 560 D/A-Converter adds a digital volume control that allows direct connec­tion to a power amplifier.

Upsampling
Audio data is buffered then upsampled to 24Bit/384kHz. We believe precision of inter­polation is more impor­tant than high clock rates. Our players and D/A converters use an algorithm from the highly regarded Anagram Technologies followed by Burr Brown D/A converters in a digital symmetric configuration. As we consider the PCM conversion technology as superior, the DSD signals get converted before its final D/A conversion.

zeroφtech
The 560 D/A-Converter 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 560’s 3rd order bessel filter, 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 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 conversion
Burr-Brown devices perform D/A conversion only. Their internal upsampling and filter stages are not used. The output currents are converted to voltage and then filtered. With an internal bandwidth of 40 MHz, this current/voltage conversion stage allows best signal-to-noise performance and maximum dynamics in the analogue domain.

Output stage
The wideband output stage of the 560 D/A-Converter has a bandwidth of 20MHz (-3dB). With such speed of response all musical details are reproduced true to life creating a three-dimensional, spatial sound to bring real listening pleasure.

Operation
The 560 D/A-Converter is operated from front-panel buttons and a rotary control. Further functions can be used to optimise and match an entire audio system around different components.

Specifications

High-resolution music files on computer are rapidly gaining the approval of audiophiles.

The 590 uses the most advanced DSP technology to achieve error-free translation into the digital domain, and uncompromising circuit design to keep digital interference away from the audio system.

Now even the most critical of audiences can enjoy the full transparency and dynamics of high resolution music files.

Highlights

DSP-Converter
The 590 USB Converter is able to process music files in PCM format with a maximum sampling rate of 192 kHz and a word length of 24bit. A powerful Digital Signal Processor manages communication with the computer. Received data is buffered in a large RAM memory.

Reference Clock
The high-precision clock of the 590 converter ensures optimal sound, using technology adapted from the 540 SACD player. The word clock signal is available at the rear panel BNC socket to allow synchronisation with an external DAC.

Power supply
The 590 is powered via its USB connection to the computer. Extensive filtering is applied to ensure that high frequency noise components and instabilities cannot affect reference clock performance or propagate through interconnecting cables to affect associated devices and degrade sound quality.

Connections
Digital outputs:
1 x SPDIF (RCA), 1 x AES/EBU (XLR), 1 x Optical (Toslink)

Digital inputs:
1 x USB

Clock-Ausgang:
1 x Wordclock (BNC)

Specifications

The Series 5 design goals were to transfer over as much as possible of the DNA of our statement Series 7 products – but make it more affordable.

We think we’ve succeeded.

The same cutting-edge design principles. The same pursuit of precision, neutrality and emotional honesty. Unrivalled in their class, the Series 5 products are unmistakably soulution.

red dot design Award

Series 5 mirrors the timeless aesthetic of the Series 7, winning soulution a red dot: best of the best design award, the highest award of the world’s largest design competition.