The B1xi integrated amplifier channels Musical Fidelity’s renowned amplifier expertise into a versatile, high-performance package. Driven by the design principles of our flagship models, the B1xi delivers 100W per channel into 4 ohms through a refined Class A/B circuit, offering a rich and dynamic tube like sound.
Designed for today’s diverse listening needs, it features a comprehensive input selection: MM phono stage, coaxial and optical digital inputs, ARC, Bluetooth, and three RCA line inputs—all engineered for seamless source integration. A variable RCA pre-out supports subwoofer connection or bi-amping, while a 5V USB-C output provides convenient and clean high-quality power for an external streamer. Encased in robust all-metal construction with solid metal controls and a solid aluminum front panel, the B1xi offers the sonic and build quality Musical Fidelity is known for, delivering a pure, uncompromised audio experience for discerning music lovers.
Specifications Amplifier
Power, both channels driven @ 1% THD: 60 Watts per channel into 8 Ohms; 100W into 4 ohms; 140W peaks into 2 ohms
Power, both channels driven @ 0.09% THD, 20Hz to 20 kHz: 50 Watts per channel into 8 Ohms; 80W into 4 ohms
Voltage 21 Volts RMS, 20Hz to 20 kHz; onset of clipping
30 Volts peak to peak
Current 8 Amps peak to peak
Damping factor 30
Output devices 1 pair per channel
Line input
THD+N < 0.02 % typical, 20Hz to 20 kHz
Signal / noise ratio > 100dB ‘A’-weighted
Input impedance 47k Ohms
Frequency response +0, –3dB, 10Hz to 30 kHz
Phono input
Sensitivity (nominal): 5mV (suitable for cartridges giving 1.5mV or more including high output MC types)
Signal / noise ratio: >70dB ‘A’-weighted
Input impedance: 47k Ohms
Input capacitance: <100pF
Gain: 42dB
Frequency response: RIAA/IEC ±1dB, 20Hz to 20 kHz
Connections
Line level inputs 3 pairs line level RCA connectors
MM phono input
Optical, coaxial, ARC digital inputs (up to 24bit/192kHz stereo PCM)
Bluetooth 5.1 input
1 pair line level RCA connectors, preamp outputs for e.g. bi-amping
-85WPC
-Excellent technical performance
-Preamp output
-Unconditional stability, will drive any loudspeaker
-Wide range of useful inputs
-including asynchronous USB and MM phono
-Excellent build quality and convenient size
The M6si has 220wpc. It has very low distortion, outstanding noise ratio and extremely flat frequency response. Its inputs are phono (MM/MC), 4 line level, 1 balanced XLR and 1 USB ‘B’ up to 24bit 96kHz asynchronous.