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Musical Fidelity B1xi – Integrated Amplifier with Class A/B Circuit

26.07.2025 06:20 | ~2 minutes read

Musical Fidelity has launched serial production of the new integrated amplifier Musical Fidelity B1xi – a development of the well-known Musical Fidelity B1 model from the 90s of the twentieth century. Despite its modest dimensions and weight of 7.2 kg, the device uses a fully discrete transistor cascade of class A/B and reaches 2 x 60 W of power when working on speakers with an impedance of 8 Ohms (or 2 x 100 W at 4 Ohms and up to 2 x 140 W at 2 Ohms).

Musical Fidelity B1xi – Integrated Amplifier with Class A/B Circuit

The commutation capabilities of the Musical Fidelity B1xi integrated amplifier include 3 line inputs on RCA connectors, an input of the built-in high-sensitivity low-noise MM phono preamplifier, an HDMI ARC port, optical and coaxial digital inputs (up to 24 bit / 192 kHz, using the built-in digital-to-analog converter based on the ESS Technology ES9018 chip), Bluetooth 5.1 and an analog input on a 3.5 mm mini-jack on the front panel.

Musical Fidelity B1xi – Integrated Amplifier with Class A/B Circuit

There is also a USB-C output for powering (5V / 1A) external devices. The model does not have a built-in streamer and Wi-Fi / Ethernet inputs - the manufacturer deliberately abandoned modules that can quickly become obsolete in the modern market.

Musical Fidelity B1xi – Integrated Amplifier with Class A/B Circuit

The internal architecture of the Musical Fidelity B1xi amplifier provides for the isolation of digital circuits on separate printed circuit boards, each of which is equipped with its own linear power supply. Volume control is via a motorized analog potentiometer, while the preamp and power amp sections are electrically isolated for low noise and clear channel separation.

Musical Fidelity B1xi. Image souce - (c) Musical Fidelity
Musical Fidelity B1xi. Image souce - (c) Musical Fidelity

The Musical Fidelity B1xi integrated amplifier is available now with suggested retail prices of €799 and $879.

Specifications

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

Integrated amplifiers — Musical Fidelity B1xi

  • Model name

    B1xi

  • Type

    Integrated amplifier with DAC

  • Analog inputs (balanced)

    N/A

  • Analog inputs (single-ended)

    3 +MM phono

  • Input sensitivity (mV)

    N/A

  • Input impedance (balanced) (Ω)

    N/A

  • Input impedance (single-ended) (Ω)

    N/A

  • Output impedance (balanced) (Ω)

    N/A

  • 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)

    2 x 60

  • Output power (4Ω) (W)

    2 x 100

  • Gain (dBu)

    N/A

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

    N/A

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

    N/A

  • Signal to Noise Ratio (dB)

    N/A

  • Total Harmonic Distortion + Noise (%)

    1

  • Damping factor

    30

  • Dimensions (mm)

    430 x 90 x 324

  • Weight (kg)

    7.2

  • Official link

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