SoulNote Series 1 Ver.2 – Japanese High-end Electronics for Refined HiFi Systems

SoulNote Inc. is one of those Japanese high-end specialists that has established a clearly recognizable identity in the premium audio sector. Rather than treating specifications as an end in themselves, the company approaches circuit topology, power supply design, mechanical construction and resonance behaviour as parts of one connected whole. With the SoulNote Series 1 Ver.2, SoulNote Inc. now applies that philosophy to three components that together form a compact yet unmistakably audiophile electronics line. The focus is on classic applications that remain central to many serious music systems: an integrated amplifier as the control hub, a dedicated phono stage for analog playback, and a D/A Converter for modern digital sources.

Key Facts

• Three-model line consisting of the SoulNote A-1 Ver.2 Integrated Amplifier, SoulNote E-1 Ver.2 Phono-Equalizer and SoulNote D-1 Ver.2 D/A Converter
• Shared engineering approach based on discrete, non-feedback circuit architecture
• Developed with short signal paths, carefully managed resonance behaviour and substantial power supply design
• SoulNote A-1 Ver.2 delivers 2 x 80 watts into 4 ohms and includes balanced attenuator volume control
• SoulNote E-1 Ver.2 supports MM, MC and optical cartridges, with variable loading and a subsonic filter
• SoulNote D-1 Ver.2 uses dual ESS ES9038PRO DACs, offers a NOS mode and features a discrete New Type-R output stage
• All three models are available in silver and black
• Recommended retail price per unit: € 4.490,-

A Concept Focused on Calmness, Structure and Resolution

The SoulNote Series 1 Ver.2 is not simply a loose collection of separate products, but a deliberately coordinated trio shaped by a common technical DNA. A defining feature is the avoidance of conventional negative feedback. According to the manufacturer, this non-feedback design approach is intended to process the music signal without the corrective influence of conventional control loops. This is combined with short, deliberately reduced signal paths, non-impregnated toroidal transformers and a mechanical structure intended to dissipate unwanted resonances in a controlled way.

In practice, that gives the series a very clear purpose. This is not about impressive feature counts or convenience-led electronics. Instead, the focus lies on how cleanly transients are reproduced, how believable spatial information appears, and how naturally tonal colours are preserved within a real-world playback chain. At a time when many audio components increasingly rely on extended digital functionality, DSP processing and lifestyle-oriented features, SoulNote Inc. deliberately places the emphasis elsewhere. The Series 1 Ver.2 is aimed at listeners who want the character of a system to be shaped by core components rather than by digital embellishment.

SoulNote A-1 Ver.2 – The Amplifier as the Energetic Centre

The philosophy behind the series becomes particularly tangible in the SoulNote A-1 Ver.2. This integrated amplifier uses a discrete, non-feedback amplification stage intended to preserve fine temporal structure without delay or corrective intervention. In practical listening terms, that points toward a presentation that should feel not only dynamic, but also convincing in its impulse precision and spatial layering.

The output stage operates in a single-push-pull configuration using powerful TO-3P transistors arranged in a four-stage Darlington layout. While that may sound like classic engineering language, the practical benefit is straightforward. Especially with demanding loudspeakers, an amplifier needs to deliver current quickly and with control. That matters just as much as headline power figures in modern systems, because many contemporary speakers demand stability, grip and composure under complex loads. With 2 x 80 watts into 4 ohms, the SoulNote A-1 Ver.2 is not positioned as a brute-force powerhouse, but as a seriously engineered partner for high-quality loudspeaker systems.

SoulNote Inc. also equips the amplifier with a newly developed bias circuit designed to reduce interference and contribute to a quieter noise floor. Equally noteworthy is the suppression of so-called CR resonances. These unwanted resonances within capacitor-resistor networks can subtly affect treble resolution, overtone structure and spatial precision. Addressing such details says a great deal about the purpose of this amplifier: not showmanship, but careful engineering in areas that can meaningfully influence musical credibility.

Day-to-day usability is not neglected. Two XLR inputs and two Cinch inputs provide enough flexibility for classically assembled systems, while the balanced attenuator volume control with relay-switched precision resistors promises accurate channel matching. That is especially relevant at low listening levels, where stable imaging and well-focused midrange reproduction depend heavily on precise balance between channels.

SoulNote E-1 Ver.2 – A Phono Stage for Broad Analog Ambitions

With the SoulNote E-1 Ver.2, SoulNote Inc. addresses listeners who regard vinyl not as nostalgia, but as a serious source component. The phono stage is designed for MM and MC cartridges, but it also supports optical cartridges. That alone makes clear that this is not intended to be a conventional add-on component, but a phono solution with a notably broader scope.

As with the other models in the line, the E-1 Ver.2 uses a new bias circuit and a discrete, non-feedback RIAA equalisation stage. The practical advantage is clear enough: a cleaner working environment for the active components and a signal path free from additional corrective loops should support tonal naturalness and fine dynamic resolution. In phono stages, where extremely small signals have to be handled with care, every gain in calmness, stability and resistance to interference can matter significantly.

The balanced MC architecture allows a fully balanced signal path from the cartridge to the output. This promises improved immunity to interference and can be especially useful in more complex systems with multiple components or longer cable runs. Variable load impedance also makes it easier to fine-tune the phono stage to different cartridges. As a result, the SoulNote E-1 Ver.2 does not remain a generic one-size-fits-all solution, but gives the user real scope to optimise the interaction between cartridge and phono electronics.

Another useful real-world feature is the integrated subsonic filter. Anyone dealing with warped records or particularly revealing loudspeakers will know how disruptive very low-frequency content below the musically relevant range can be. A carefully implemented filter can reduce unnecessary stress on both amplifier and speakers without compromising musical flow. The fact that SoulNote Inc. also supports optical cartridges and uses the complete New Type-R circuit for this purpose further underlines the company’s intention to treat analog playback not only as a traditional discipline, but as an area open to specialised concepts as well.

SoulNote D-1 Ver.2 – Digital Audio with an Emphasis on Temporal Integrity

The third component in the line is the SoulNote D-1 Ver.2 D/A Converter. Here too, SoulNote Inc. makes it clear that digital audio is not simply about the choice of DAC chip. The converter uses two ESS ES9038PRO devices, but what matters more is how these are integrated into the broader concept. The D/A Converter features a fully non-feedback New Type-R output stage, a discrete analog section originally developed for the reference-class SoulNote E-3.

For listeners, this is relevant in several ways. First, the analog output stage is intended to allow impulses to come through with freedom and ease rather than sounding smoothed by complex correction processes. Second, SoulNote Inc. combines the conversion stage with a current-optimised I/V conversion based on resistors. The underlying idea is to achieve digital precision without sacrificing naturalness, body and spatial stability.

Particularly interesting is the NOS mode. Non-oversampling avoids the digital filters commonly associated with classic oversampling concepts and their potential pre- and post-ringing effects. That may sound theoretical in everyday conversation, but it can become highly relevant in practice. Voices, piano attacks, guitar strings and percussion often benefit when the temporal shape of a transient remains as untouched as possible. At the same time, oversampling remains available as an alternative, which gives the user welcome flexibility depending on personal taste, system context and source material.

The converter can process Linear PCM signals up to 32 Bit and 768 kHz as well as DSD up to DSD512, though this applies only via USB. The remaining inputs are limited to 24 Bit and 192 kHz as well as DSD in DoP form, meaning DSD over PCM. SoulNote Inc. also employs a generously dimensioned, non-impregnated transformer, several non-feedback voltage regulators and clearly separated power supply sections. The practical goal is to preserve calmness, order and transparency even with dense and complex musical material, which remains one of the defining strengths of well-executed high-end digital playback today.

Three Components, One Voice

What ultimately makes the SoulNote Series 1 Ver.2 compelling is not a single isolated feature, but the consistency with which one shared design language runs through all three models. The integrated amplifier, phono stage and D/A Converter all follow the same line of thinking: minimise intervention in the signal, engineer the power supply with great care, rely on discrete circuitry and reduce unwanted mechanical influence through thoughtful construction.

For the user, that offers a tangible advantage. Anyone building a system with synergy in mind rather than by coincidence will find three components here that are clearly conceived as parts of a unified electronics family. That can make it easier to assemble a coherent setup, whether the focus lies on vinyl, on digital playback, or on a system where analog and digital sources are meant to coexist on equal terms.

Price and Availability

The SoulNote Series 1 Ver.2 components, namely the SoulNote A-1 Ver.2 Integrated Amplifier, the SoulNote E-1 Ver.2 Phono-Equalizer and the SoulNote D-1 Ver.2 D/A Converter, are scheduled to be available from authorised specialist retailers from March 2026. All three components will be offered in silver and black. The recommended retail price is € 4.490,- per unit. Distribution for Germany, Austria and Switzerland will be handled by IAD GmbH.

Conclusion

The SoulNote Series 1 Ver.2 is one of those product lines that does not try to impress through exaggerated superlatives, but through consistency of purpose. SoulNote Inc. applies a coherent concept to amplification, phono and digital conversion that seems designed not to dazzle, but to persuade through refinement. That is precisely where the appeal of these three components lies: they promise no technical fireworks, but rather a serious, carefully balanced foundation for listeners who want to experience music with structure, colour, energy and convincing spatial integrity.

Technical Data