Soulnote A-0 Ver2 Integrated Amplifier

Soulnote A-0 Ver2 Integrated Amplifier Key Features:

• Low-Power, High-Purity Design – Deliberately limited 10W output prioritizes absolute sound quality over brute force.
• Four-Stage Darlington Output Topology – Flagship-grade drive architecture delivers precision and microdynamic realism.
• Fully Discrete, Non-Feedback Circuit – Ultra-simple signal path preserves speed, openness, and tonal integrity.
• Advanced Bias Circuitry – Newly developed bias design improves signal-to-noise performance and low-level clarity.
• Flexible Preamp Functionality – Selectable pre-out modes with RCA and XLR outputs enable system expansion and headphone use.

Product Description:

Purposefully Minimal, Musically Absolute

The A-0 VER2 embodies Soulnote’s design philosophy of absolute signal purity. By intentionally limiting output power to 10 watts per channel, Soulnote focuses entirely on extracting the highest possible sound quality—free from compromise. The result is an integrated amplifier that excels in transparency, speed, and expressive nuance, particularly at realistic listening levels.

TO-220 Output Transistor Architecture

At the heart of the A-0 VER2 is a push-pull output stage built around TO-220 type transistors, selected for their low collector-base capacitance and excellent high-frequency behavior. This choice ensures fast response and stable operation across an exceptionally wide bandwidth, contributing to the amplifier’s effortless openness and clarity.

Four-Stage Darlington Configuration

Despite its modest power rating, the A-0 VER2 employs the same four-stage Darlington configuration found in Soulnote’s flagship amplifiers. This advanced topology enables precise control and dynamic responsiveness, allowing the amplifier to reproduce subtle air-pressure changes and fine gradations in musical energy—even at very low listening levels.

Fully Discrete, Non-NFB Circuit Design

Aside from essential selector and volume control functions, the A-0 VER2 maintains an extremely simple, fully discrete circuit without global negative feedback. This minimalist approach preserves immediacy, harmonic integrity, and natural timing, echoing the design principles used in Soulnote’s top-tier models such as the A-3.

Newly Developed Bias Circuit

A redesigned bias circuit further refines the amplifier’s performance by improving signal-to-noise ratio and enhancing low-level resolution. This contributes to the A-0 VER2’s exceptionally quiet background and heightened sense of realism.

Flexible Preamplifier Operation

The A-0 VER2 offers versatile pre-out functionality with selectable High and Low modes. High mode outputs the loudspeaker signal at full strength, while Low mode provides attenuated output for compatibility with external power amplifiers. Additional modes allow the loudspeaker output to remain active or be disabled entirely when using the unit as a preamplifier.

Balanced And Unbalanced Connectivity

Pre-out connections are available via both RCA and XLR terminals. The XLR configuration uses a floating ground design (1: GND, 2: Hot, 3: Floating GND), ensuring compatibility with balanced systems while maintaining Soulnote’s low-noise design philosophy.

Specifications: