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Soulnote A-3core – a mighty power amplifier

24.12.2024 06:56 | ~1 minute read

Japanese manufacturer of High End electronics, Soulnote presented a stereo (2 x 120 W at 4 Ohms) power amplifier A-3core, which implements the concept of "dual mono". Each channel of amplification is powered by a separate toroidal 700 W transformer.

Soulnote A-3core. Image source - (c) Soulnote
Soulnote A-3core. Image source - (c) Soulnote

A push-pull output stage on high-current bipolar transistors TO3 (Metal CAN-type) with a copper cooling plate (which is also a power bus) allows Soulnote A-3core to achieve hyper-realistic sound. Among other things, a four-stage Darlington configuration with super-powerful driver and pre-driver and a special ground bus are used.

Soulnote A-3core. Image source - (c) Soulnote
Soulnote A-3core. Image source - (c) Soulnote

In its products, Soulnote uses a special mechanical concept, which is also implemented in the Soulnote A-3core: the design of the massive device does not use tight screw connections of individual elements for acoustic reasons. The amplifier chassis and the top and bottom covers are not tightly fastened. In particular, the amplifier block has a transversely movable three-point structure with titanium guides. So, thermal expansion and contraction do not cause stress on the structure.

Specifications

This product is in the Hi-Fi and High End Electronics and Acoustics database

Power amplifiers stereo — Soulnote A-3core

  • Model name

    A-3core

  • Input sensitivity (mV)

    N/A

  • Input impedance (balanced) (Ω)

    24000

  • Input impedance (single-ended) (Ω)

    N/A

  • Output impedance (balanced) (Ω)

    N/A

  • Output impedance (single-ended) (Ω)

    N/A

  • Max current (A)

    N/A

  • Output power (8Ω) (W)

    N/A

  • Output power (4Ω) (W)

    2 x 120

  • Gain (dBu)

    N/A

  • Frequency response low +/- 3dB (Hz)

    2

  • Frequency response high +/- 3dB (Hz)

    200000

  • Signal to Noise Ratio (dB)

    N/A

  • Total Harmonic Distortion + Noise (0% global feedback) (%)

    N/A

  • Total Harmonic Distortion + Noise (100% global feedback) (%)

    0.27

  • Max power consumption (W)

    N/A

  • Damping factor

    N/A

  • Dimensions (mm)

    454 × 189 × 435

  • Weight (kg)

    29

  • Official link

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