Musical Fidelity B1 xi
MPN #MUFB1XIBL
Class A/B amp, 60W/8 ohm, MM phono stage, ARC/coax/optical/Bluetooth, USB-C power out, discrete linear PSU, solid metal chassis, ESS9018 DAC.
The Musical Fidelity B1xi is a pure expression of high-end audio craftsmanship, delivering the warmth and detail of analog performance with the versatility of modern connectivity. Designed around a fully discrete Class A/B architecture, it produces 60 watts per channel into 8 ohms (100W into 4 ohms), effortlessly driving demanding loudspeakers while preserving musical richness and clarity. Inspired by the brand's flagship designs, the B1xi features a robust toroidal transformer, separate linear power supplies for each audio stage, and meticulous shielding to eliminate interference and maintain audio purity.
Connectivity is comprehensive and thoughtfully engineered: MM phono stage for vinyl lovers, coaxial and optical digital inputs, HDMI ARC for TV integration, Bluetooth 5.1 for wireless streaming, and multiple RCA inputs for analog sources. It also features a preamp output for subwoofer integration or bi-amping and a 5V USB-C output to power an external streamer. Encased in a rugged, all-metal chassis with a beautifully machined aluminum front panel, the B1xi exemplifies Musical Fidelity's no-compromise approach-delivering audiophile-grade performance with understated elegance and durability for years to come.
Features
High-Power Class A/B Amplification: Delivers 100W per channel into 4 ohms with rich, tube-like sound and wide dynamic range.Versatile Input Options: Includes MM phono, coaxial, optical, ARC (HDMI), Bluetooth, and 3 RCA line inputs.Precision Analog Control: Features a motor-driven analog volume potentiometer for pure signal control.Built-In Phono Stage: Low-noise, high-gain phono input designed for MM cartridges for vinyl playback.Discrete Digital Architecture: Digital and ARC inputs are isolated on separate boards with dedicated power for clean sound.ESS DAC Integration: High-resolution DAC with up to 24-bit/192kHz playback ensures accurate digital-to-analog conversion.Premium Build Quality: All-metal chassis with solid aluminum front panel for durability and RF shielding.Dedicated Pre-Out and USB-C Power: Preamp output for subwoofer or bi-amp setup, plus USB-C 5V power for streamers.No Wi-Fi by Design: Excludes wireless streaming to preserve audio fidelity and hardware longevity.Engineered for Purity: Designed without displays or apps to focus purely on analog excellence.
Specifications
General Specifications
Integrated Class AB amplifierFully discrete transistor-based power ampMM phono stage and preamp outputSeparate digital and ARC boards with linear power supply5V USB C output for external streamer powerBluetooth 5.1 inputAll-metal construction with extruded aluminum front panel
Amplifier
Output power 60W per channel into 8 ohmsOutput power 100W per channel into 4 ohmsPeak output power 140W into 2 ohmsOutput power at 0.09 percent THD: 50W into 8 ohms, 80W into 4 ohmsVoltage 21V RMS (20Hz"20kHz), 30V peak to peakCurrent 8A peak to peakDamping factor 30Output devices 1 pair per channel
Preamplifier
THD plus N less than 0.02 percent (20Hz to 20kHz)Signal to noise ratio greater than 100dB A-weightedInput impedance 47k ohmsFrequency response plus 0, minus 3dB, 10Hz to 30kHzMotor-driven analog potentiometerRCA pre-out for subwoofer or bi-amping
Phono Input
Sensitivity 5mVSignal to noise ratio greater than 70dB A-weightedInput impedance 47k ohmsInput capacitance less than 100pFGain 42dBFrequency response RIAA IEC plus or minus 1dB, 20Hz to 20kHz
Digital Input
1 coaxial input up to 24bit 192kHz1 optical input up to 24bit 192kHz1 ARC input up to 24bit 192kHzESS9018 DAC chip
Connections
3 x RCA line-level inputs1 x MM phono input1 x coaxial, 1 x optical, 1 x ARC digital inputs1 x Bluetooth 5.11 x RCA preamp output1 pair 4mm banana plug/binding posts for speakers
Power Supply
Independent power supplies for preamp, power amp, and digital sectionsToroidal transformer280W maximum power consumptionMains voltage 115V or 230V AC 50/60Hz (factory preset), 100V optional
Mechanical
Weight 7.2kg (unit only), 8.9kg (with packaging)Dimensions 430mm W x 90mm H x 324mm D (including terminals)
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