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Integrated amplifiers — Vitus Audio RI-101 MK.II

Description, images, technical data and specifications

Vitus Audio RI-101 MK.II
Image source — © Vitus Audio

The overall design of the new RI-101 is the same as that of the original RI-100 with identical power and output stages. But that's where the similarities end. The input stage in the power amplifier has been significantly updated, and the main updates included in the preamp section reduce noise levels. noise level, which provides improved resolution and "blackness". We've brought the RI-101's sound a little closer to that of the SIA-025 and introduced a much higher resolution volume control from our SL-103 and MP-L201 models, however, despite this, the RI-101 is still its own beast and offers
the listener its own unique musical experience.

Specifications

  • Model name

    RI-101 MK.II

  • Type

    Integrated Amplifier with DAC

  • Analog inputs (balanced)

    3

  • Analog inputs (single-ended)

    2

  • Input sensitivity (mV)

    2000

  • Input impedance (balanced) (Ω)

    16 000

  • Input impedance (single-ended) (Ω)

    16 000

  • Output impedance (balanced) (Ω)

    33

  • Output impedance (single-ended) (Ω)

    N/A

  • D/A conversion

    N/A

  • Phono MM/MC current-sensing input impedance (Ω)

    N/A

  • Output power (8Ω) (W)

    300

  • Output power (4Ω) (W)

    600

  • Gain (dBu)

    N/A

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

    N/A

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

    800 000

  • Signal to Noise Ratio (dB)

    >100

  • Total Harmonic Distortion + Noise (%)

    0.04

  • Damping factor

    N/A

  • Dimensions (mm)

    182 × 435 × 470

  • Weight (kg)

    38

  • Official link

    https://www.vitusaudio.com/products/ri-101-mk-ii/

Vitus Audio SIA-025 MK.II

More components

  • SIA-030

    Integrated amplifiers

    Vitus Audio SIA-030

    Vitus Audio SIA-030 boasts a 2.2 KVA transformer, fully vibration-proof. The capacity of the main capacitor bank is 400,000 uF, the additional one is 216,000 uF. The pre-gain section is completely shielded. All Vitus Audio SIA-030 modules can be upgraded in the future.

  • SIA-025 MK.II

    Integrated amplifiers

    Vitus Audio SIA-025 MK.II

    SIA 025 Mk.II is made symmetrically in the form of a dual mono idea centered on a massive mains transformer. The impression created behind the cover is reminiscent of the huge engine compartment of a 12-cylinder Jaguar from the 1980s: filled to the brim. The circuit is designed in a now rare form of Class A amplification, which is also applicable for comparison with 12-cylinder engines. Although the output power is minimal (25 watts at 8 ohms or 50 watts at 4 ohms), there is no cross-distortion inherent in efficient amplifier circuits.

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