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The Musical Fidelity B1xi Integrated Amplifier builds on the legacy of the original 1990s B-series, prioritising sound quality and reliability over modern additions like screens, apps, or streaming, offering a more traditional, purist listening experience. It uses a fully discrete Class A/B design with a generously rated toroidal transformer to deliver 60W per channel into 8 ohms and 100W into 4 ohms, meaning you get clean and controlled power that's suitable for a wide range of real-world speakers. A separate preamp supply keeps background noise low and preserves signal clarity at all volumes.
When it comes to connecting your gear, you get a dedicated MM phono stage for direct turntable integration, three line-level RCA inputs, coaxial and optical digital inputs, HDMI ARC for linking your TV audio, and Bluetooth 5.1 for wireless playback. All digital sources are isolated on separate boards with their own linear power supplies, feeding into a carefully tuned ESS9018 DAC. You also get a variable RCA pre-out for subwoofer integration or bi-amping, solid metal controls on the front panel, and a full metal chassis that helps shield against unwanted interference.
Product Ref: 328864
"Retaining the original’s Class AB topology, the new B1xi integrated amplifier is a modern interpretation of the 1980s icon."
| Power, both channels driven @ 1% THD | 60 Watts (8 ohms)100W (4 ohms)140W peak (2 ohms) |
|---|---|
| Power, both channels driven @ 0.09% THD (20Hz to 20kHz) | 50W (8 ohms)80W (4 ohms) |
| Voltage | 21 Volts RMS, 20Hz to 20kHz; onset of clipping30 bolts peak to peak |
| Current | 8 Amps peak to peak |
| Damping factor | 30 |
| Output devices | 1 pair per channel |
| THD+N | <0.02% typical, 20Hz to 20kHz |
|---|---|
| Signal/noise ratio | >100dB 'A'-weighted |
| Input impedance | 47k Ohms |
| Frequency response | +0, -3dB, 10Hz to 30kHz |
| Sensitivity (nominal) | 5mV (suitable for cartridges giving 1.5mV or more including high output |
|---|---|
| Signal/noise ratio | >70dB ‘A’-weighted |
| Input impedance | 47k Ohms |
| Input capacitance | <100pF |
| Gain | 42dB |
| Frequency response | RIAA/IEC ±1dB, 20Hz to 20 kHz |
| Inputs | 3 x pairs of line-level RCA inputsMM phonoOptical, coaxial, ARC HDMI (digital inputs up to 24bit/192kHz stereo PCM)Bluetooth 5.1 |
|---|---|
| Outputs | 1 x pair of line-level RCA preamp outputs for e.g. bi-amping1 x pair of 4mm banana plug binding posts |
| Mains voltages | 115/230VAC 50/60Hz (factory pre-set)100VAC 50/60Hz (alternative) |
|---|---|
| Consumption | 280 Watts maximums |
| Dimensions (W x D x H, including feet and terminals) | 430 x 90 x 324 mm |
|---|---|
| Product weight | 7.2 kg |
| Packaged weight | 8.9 kg |
| Product code | MFIB1XIAB |
| EAN | 9120137900859 |