Soulnote A-1 ver.2

TECHNOLOGY

Full discrete non-NFB circuits

Discrete fully non-NFB circuitry is employed. A remarkably simple configuration is adopted, featuring merely a selector and volume control attached to the power amplifier. This is essential, as with SOULNOTE’s flagship integrated amplifier A-3, to preserve the freshness of the musical signal. Ultra-high-purity resistors are employed in the circuitry eliminating capacitive resonance. This ensures impedance remains constant up to high frequencies. Without limiting the bandwidth, it achieves both high-fidelity sound quality without loss of freshness and exceptional stability.

Single push-pull output stage

The single push-pull output stage employs a four-stage Darlington configuration utilizing TO-3P high-power, low-Cob transistors. This eliminates sound blurring whilst boasting formidable drive capability.

New Bias Circuit

Featuring a newly developed bias circuit, delivering a dramatic improvement in S/N.

High-speed discrete non-NFB power supply

A non-impregnated toroidal power transformer is adopted. By deliberately limiting the secondary output voltage (the amplifier's maximum output), current delivery capability has been enhanced. It delivers impressive drive capability with a responsive drive, even for low-impedance modern high-end loudspeakers.

Relay-switched balanced attenuator

Volume adjustment employs a relay attenuator system in a balanced configuration. Transparency is enhanced, allowing the sound image to emerge with three-dimensional clarity. Quality at low volumes is improved, without concern for gang error. Two XLR balanced inputs are provided.

Direct mechanical grounding construction

A spike foot connects directly under the center of gravity of the transformer to straight-release harmful vibrations without interfering with the unit housing itself.
This achieves both supremely lively musical expression and high S/N.

Symmetrical chassis with resonance control

The symmetrical construction of the chassis increases rigidity balance while controlling the sharpness of resonance (Q factor).
This eliminates the usual obstruction of sound containment in highly rigid systems and creates the high-resolution, lively SOULNOTE sound.