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Soulnote A-3 core stereo amplifier

Complete separation of left and right

Editorial Staff by Editorial Staff
December 21, 2024
Reading Time: 3 mins read
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soulnote-a3core-stereo-power-amplifier

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Soulnote has once again pushed the boundaries of high-fidelity audio with the release of its latest stereo amplifier, the A-3 Core. This innovative power amplifier promises not only superior sound quality but also groundbreaking design features that set it apart from its competitors in the high-current stereo amplifier market.

Revolutionary Grounding Technology

At the heart of the A-3 Core is its complete separation of left and right channel grounds, a feature derived from the acclaimed GND separation technology in Soulnote’s P-3 pre-amplifier. This approach to grounding—termed non-grounding—eliminates the conventional drawbacks associated with stereo power amplifiers that handle high currents. The result is a stereo amplifier that achieves an unprecedented level of clarity and a three-dimensional sound field, providing listeners with an immersive audio experience.

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Single Push-Pull Output Stage for Pristine Sound

The A-3 Core employs a single push-pull SEPP (Single Ended Push-Pull) output stage, utilizing TO3 (Metal CAN-type) bipolar transistors similar to those used in the M-3 model. This configuration ensures blur-free music reproduction across a wide frequency range, from ultra-low to super-high frequencies. The amplifier’s design maintains the micro time axis purity, resulting in heart-stirring music reproduction that audiophiles will appreciate.

Advanced Thermal Management

To enhance performance, the A-3 Core features a lightweight copper bus bar heat sink that serves a dual purpose: it dissipates heat while also supplying power to the TO3 transistors. This innovative design eliminates unnecessary wiring, reduces instability, and mitigates sound quality degradation typically caused by insulation sheets. The result is a sound quality that boasts transparency and freedom, further enhanced by the physical independence of the heat sink from the chassis.

State-of-the-Art Circuit Design

Soulnote has incorporated its newly developed Type-R circuit for voltage amplification, renowned for its fully balanced non-negative feedback (non-NFB) design. The amplifier utilizes naked foil resistors throughout its circuitry, ensuring the highest fidelity in audio reproduction. Additionally, the GND anchor system enhances the sense of openness and low-end grip, contributing to the amplifier’s overall performance.

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Powerful and Efficient Power Supply

The A-3 Core is equipped with two robust 700VA toroidal power transformers dedicated to left and right channels, alongside an additional transformer for the control system. This high-speed, non-NFB power supply utilizes advanced components, including specially selected rectifying capacitors and SiC diodes, to ensure optimal performance. Furthermore, independent power switches for each transformer enhance sound quality by minimizing contact point interference.

Unfixed Structure to Minimize Vibration

A unique unfixed structure characterizes the amplifier, designed to eliminate harmful vibrations. The amplifier block, terminals, and covers are not rigidly fixed, allowing them to respond dynamically to vibrations. This design feature employs titanium sliders to further isolate the amplifier from external disturbances, enhancing sound clarity and fidelity.

Specifications and Availability

The A-3 Core comes in two premium finishes—Silver (A-3CORE SE) and Black (A-3CORE BE)—and boasts impressive specifications, including a rated output of 120W per channel at 4 ohms and a frequency response of 2Hz to 200kHz. Its total harmonic distortion is a mere 0.27%, ensuring a clean and accurate sound reproduction.

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With a weight of 29kg and dimensions of 454mm x 189mm x 435mm, the A-3 Core is as robust in build as it is in performance. Included accessories feature a spike board, spikes, and a power cable.

The Soulnote A-3 Core Stereo Amplifier is not just an upgrade; it represents a significant advancement in audio technology. For audiophiles and music lovers alike, the A-3 Core promises to deliver an unparalleled listening experience, setting a new standard for stereo amplifiers in the high-fidelity audio landscape. As it hits the market, enthusiasts are eager to experience the sonic brilliance this amplifier has to offer.

Tags: Power amplifiersSoulnote
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Editorial Staff

Editorial Staff

An exceptional collection of pencils, pens and keyboards, all equally possessed by audio and video. In some dark den, hidden from all women, our editorial staff write and type about their infinite love of the audiovisual. Please, have some compassion!

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