Musical Fidelity B1xi

The B1xi distils Musical Fidelity’s renowned amplifier expertise into a versatile, high-performance integrated amplifier suited to the modern listener’s requirements. Featuring a purpose-designed Class A/B circuit with 60W (8Ω) power output, there’s little this amplifier cannot work with.

• HDMI Licensed
• HDMI-ARC connectivity for seamless connection with a TV
• Remote control included
• Class AB amplifier design

In a nutshell

Designed for today’s diverse listening needs, the B1xi features an array of input options. From the low-noise, high-gain MM phono stage, through multiple line-level inputs for other traditional sources, and onto the built-in DAC, HDMI ARC input and Bluetooth receiver for wireless streaming – each input is optimised for the best possible performance. There’s also an array of broader connectivity on offer, including the RCA variable pre-output for subwoofers or a dedicated power amplifier, a 5V USB-C power output for running an external streamer, a front-mounted mini-jack line input, and a headphone output for private listening sessions.

No WiFi by design

The only feature you might consider missing from the B1xi is Wi-Fi streaming – but that decision is deliberate. Where others might produce “all-in-one” streaming amplifiers, they often have to compromise on quality – or they become very expensive. Built-in streaming can also limit the amplifier’s lifespan, as when the playback technology is superseded, the hardware can often become unusable or less functional. At Musical Fidelity, everything is produced with a focus on good hardware, robust design, and a desirable sound quality that means your investment can last for decades. The B1xi can play nicely with any external streamer, and by keeping the source device separate you can guarantee the amplifier can play at the heart of your system for years to come.

Pure Class A/B Excellence with True High-End Audiophile Design

The B1xi benefits from a premium amplifier design, using transistor amps in Class A/B to deliver a highly engaging, tube-like sound. Delivering 60 watts into 8 ohms (100W, 4Ω / 140W, 2Ω), it doesn’t struggle to drive a wide variety of speakers. There’s a good degree of headroom on offer for proper peak power delivery and a wide dynamic range, meaning your listening experience is never strained.

The pre-amplifier section of the B1xi features its own dedicated linear power supply, ensuring ultra-low noise and excellent channel separation. This design effectively treats the integrated amplifier as electrically separate pre- and power-amp stages. Volume control is handled via a motor-driven analogue potentiometer for the purest signal control.

Premium Throughout

The internal layout of the B1xi is optimised for perfect sound – despite the many features that are included. Once you take the lid off, you can see that the potentially interference-inducing digital boards are physically separated into their own PCBs with their own linear power supply. Other signs of quality are found in the amplifier’s industrial design. The robust metal controls on the extruded aluminium front panel merge stylishly with the metal chassis, giving a sense of control and reliability to every aspect of the design.

Focus on the Sound

The B1xi is a true hi-fi amplifier, designed by music lovers. By focusing on good design principles and high-end sound performance, and equipping the design with good connectivity options, this is the ideal system hub for anyone looking for great sound at an affordable price.

• Amplifier Type: Integrated Amplifier
• Amplifier Class: A-B
• Power Output (4Ω): 100 W
• Power Output (8Ω): 60 W
• Amplifier Voltage Output: 21 V RMS, 30 V Peak
• Amplifier Current Output: 8 Amps Peak
• Output Devices: 1 Pair Per Channel
• Frequency Response: 20Hz - 20kHz
• Phono Input Sensitivity (MM): 5 mV
• Damping Factor: 30
• Signal To Noise Ratio: 100 dB
• Signal To Noise Ratio (MM Input): >70 dB
• Phono Input: MM Input 
• Phono Stage Impedance (MM): 47 kΩ
• Phono Input Gain (MM): 42dB
• RCA Input(s): 3
• Bluetooth Version: 5.1 
• HDMI Input(s): ARC Input
• Optical Input(s): 1 (24-bit, 192kHz)
• Coaxial Input(s): 1 (24-bit, 192kHz)
• DAC Chip: ESS9018
• Fixed Analogue Output(s): 1 x RCA Pair
• Enclosure Material: Metal
• Maximum Power Consumption: 280 W
• Dimensions (W x H x D): 430 x 90 x 324 mm
• Weight: 7.2 kg