93%
Soulution Audio 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.
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Soulution Audio 757 deemphasis preamplifier
The Soulution Audio 757 deemphasis preamplifier redefines what a modern phonostage can do, combining reference-level transparency with unmatched analog versatility. Its ultra-broadband Class-A output stage, vanishingly low noise floor and precise deemphasis produce a neutral, highly resolving presentation with taut bass, vivid midrange presence and extended, well-controlled treble that preserves microdetail and timing.
Reviewer Jonathan Valin of The Absolute Sound positioned the 757 as a new reference for phonostages, noting its ability to handle MC, MM, DS Audio optical cartridges and tape-head inputs while also functioning as a linestage.
Mechanically substantial and meticulously engineered, the roughly 30 kg chassis, >100 dB CMRR and wide channel separation reflect top-tier construction and shielding. Ideal for collectors and reference systems seeking a single, future-proof analog front end, the 757 pairs exhaustive loading and gain options with musical transparency.
Pros
- Reference-grade transparency and near-silent background supported by measured specs and reviewer evaluation.
- Truly universal analog compatibility — handles MC, MM, DS Audio optical cartridges and tape-head inputs with wide, user-adjustable loading and gain ranges.
- Outstanding dynamic performance and ultra-broadband Class A output preserves transient impact and musical presence.
- Premium build and engineering — heavy, well-shielded chassis with excellent common-mode rejection and channel separation.
Transparency
93/100
Specification-level evidence (spot noise < -170 dBV/√Hz, THD 'not measurable', CMRR >100 dB, deemphasis accuracy ±0.05 dB, channel separation >100 dB) indicates an exceptionally low noise floor and highly accurate RIAA/deemphasis. The Absolute Sound review treats the unit as a new reference for phono stages, implying outstanding transparency and negligible audible background noise. Given the solid-state, ultra-broadband Class A output topology and the measured specs, a very high Transparency rating is warranted.
Sound Quality
92/100
Ultra-broadband Class A output stage (0–2 MHz reported), robust output current capability, and reviewer praise for its liveliness support excellent transient and micro-dynamic performance. The Absolute Sound's characterization of the unit as a reference indicates records retain punch and presence rather than sounding compressed. These technical and subjective indicators point to very strong dynamics.
Cartridge Compatibility
95/100
The 757 supports MM, MC, tape-head, and DS Audio optical cartridges with wide, user-adjustable loading: MC 10 Ω–1000 Ω, MM fixed 47 kΩ with 0–750 pF capacitance adjustment, tape 20 kΩ–100 kΩ and 0–750 pF, plus very wide gain ranges (MC to +80 dB, MM to +60 dB). The combination of multiple physical inputs and comprehensive loading/gain flexibility makes it effectively universal for current cartridges and tape heads. This level of adjustability and signal-path versatility merits an exceptional compatibility rating.
Build Quality
94/100
Heavy, well-engineered hardware (approx. 30 kg), Class A ultra-broadband output stage, and measured performance metrics (CMRR and channel separation >100 dB) indicate top-tier construction and shielding. The Absolute Sound calls it 'a stunning achievement,' and the chassis, power, and measured performance all point to premium component selection and industrial design. Overall, build and engineering are at a very high level.
Value for Money
86/100
Reviews lavishly praise performance, but no price or explicit comparative pricing/value analysis is provided in the supplied materials. Per the scoring rules, absent reviewer commentary about price or peers, a neutral baseline score is appropriate—even while acknowledging that reviewers treat it as a new performance reference. If price information or multiple reviewers' value comparisons were available, this rating could change.
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