Why the Musical Fidelity B1xi Flips the Bird at Network Amps and Still Makes Total Sense

Musical Fidelity has gone back to its roots — and finally given budget-conscious audiophiles something worth getting excited about. The new B1xi integrated amplifier, priced at $879 USD / $1,229 CAD, strips away the bloat and zeroes in on what matters: solid engineering, clean design, and a focus on long-term performance. No Wi-Fi. No screen. Just the core essentials done right.

Reviving the spirit of the original B1 from the ’90s, the B1xi keeps things honest with a fully discrete Class A/B power amp that delivers 60W into 8 ohms and up to 140W into 2 ohms — more than enough to handle real-world loudspeakers, not just spec sheet princesses. Thanks to parent company Pro-Ject, which handles design and manufacturing in Europe, Musical Fidelity can keep costs down without outsourcing quality.

You get coaxial, optical, ARC, Bluetooth 5.1, and even a proper MM phono stage — all running on separate boards with dedicated linear power supplies. That’s a rare configuration at this price point, and a reminder that Musical Fidelity hasn’t forgotten what made it a household name among serious listeners in the first place.

This isn’t a streaming amp. It’s a proper integrated amplifier with a DAC. And if past MF products are anything to go by, the B1xi is built to last longer than most relationships.

Why the B1xi Exists: A Return to Real-World Hi-Fi, According to Heinz Lichtenegger

According to Heinz Lichtenegger — Pro-Ject CEO and the man responsible for turning a tiny Austrian turntable company into the biggest name in audiophile vinyl playback — the B1xi represents a return to what really matters: sound quality, reliability, and long-term value.

Musical Fidelity has always stood for musical realism, warmth, and dynamic range — values rooted in founder Antony Michaelson’s vision. That vision has traditionally leaned on Class A designs and tube amplification. But those come with real-world trade-offs like heat, size, and cost.

So what’s the next best thing? A properly engineered, discrete Class A/B transistor amp with enough current and headroom to drive real speakers. And that’s exactly what the B1xi delivers.

Why no Wi-Fi? No streamer? No touchscreen or app? Because according to Heinz, those are the parts that fail first. Software becomes outdated, streaming platforms shift APIs, and display drivers die long before the power supply gives out. And when they do, you’re stuck with a big paperweight.

Yes, there’s a DAC. Yes, there’s Bluetooth 5.1. And there’s even a built-in MM phono stage. But there’s no display to burn out and no app that’ll stop being supported in five years. Just an amp that will still work — and sound good — in 2045.

And as someone who builds more analog gear than just about anyone on the planet, if anyone can pull this off at this price, it’s Heinz and his team.

Musical Fidelity B1xi Integrated Amplifier — Key Specifications and Highlights

Amplifier Power

• 60W per channel @ 8Ω (1% THD)
• 100W per channel @ 4Ω (1% THD)
• 140W peak @ 2Ω
• 50W per channel @ 8Ω (0.09% THD)
• 80W per channel @ 4Ω (0.09% THD)
• Voltage: 21V RMS (clipping onset)
• Current: 8A peak-to-peak
• Damping factor: 30
• Output devices: 1 pair per channel

Line Input

• THD+N: < 0.02% (20Hz–20kHz)
• Signal-to-noise ratio: >100dB (A-weighted)
• Input impedance: 47kΩ
• Frequency response: +0 / –3dB (10Hz–30kHz)

Phono Input (MM)

• Sensitivity: 5mV (compatible with cartridges ≥1.5mV)
• Signal-to-noise ratio: >70dB (A-weighted)
• Input impedance: 47kΩ
• Input capacitance: <100pF
• Gain: 42dB
• Frequency response: RIAA/IEC ±1dB (20Hz–20kHz)

Connections

• 3 pairs line-level RCA inputs
• MM phono input
• Digital inputs: Optical, Coaxial, HDMI ARC (up to 24-bit/192kHz PCM)
• Bluetooth 5.1 input
• Preamp output (RCA pair) for bi-amping or active subwoofer
• Speaker outputs: 4mm banana plugs / binding posts

Power Requirements

• Mains voltage: 115/230VAC 50/60Hz (factory preset), 100VAC option
• Max power consumption: 280W

Physical

• Weight: 7.2 kg (unit), 8.9 kg (shipping)
• Dimensions (W x H x D): 430mm x 90mm x 324mm (including feet and terminals)

The Bottom Line

The Musical Fidelity B1xi is a throwback to what made the original B-Series a cult favorite, but it’s been modernized in the right ways — not by stuffing it with wireless bells and whistles, but by focusing on what actually impacts sound quality. This is a true Class A/B integrated amplifier built on a fully discrete transistor design — no op-amps, no DSP weirdness, and no digital signal manipulation.

The preamp section is exactly what you’d hope for at this price: low noise, high headroom, and excellent channel balance across the volume range. The motor-driven potentiometer lets you enjoy that smooth analog feel, but you can still adjust volume from the remote if you’re across the room.

You also get a proper MM phono stage, so you can plug in a turntable without needing a separate box — and yes, it supports high-output moving coils, too. There’s a pre-out as well, so you can bi-amp or run an active subwoofer if you want to expand your system.

On the digital side, the B1xi doesn’t skimp. It supports up to 24-bit/192kHz PCM via optical, coaxial, and HDMI ARC inputs. All digital processing is kept on its own board, complete with an independent linear power supply, keeping noise out of the analog section.

Power comes from a generously overbuilt toroidal transformer, with independent regulation for the preamp, power amp, and digital stage. That separation ensures nothing steps on anything else — dynamic peaks stay clean, and background noise stays low. For those running small external streamers (like a WiiM, iFi Zen, or even a Roon Bridge), the unit includes a 5V USB-C power output. Small touch, big convenience.

The chassis is classic Musical Fidelity — clean lines, heavy-gauge metal, and that thick extruded aluminum front panel that makes everything feel solid. The enclosure isn’t just for looks — it provides EMI shielding to keep out electrical nasties and helps extend the unit’s working life. Musical Fidelity gear is known to last decades, and there’s every reason to believe the B1xi will be no different.

For $879 USD / $1,229 CAD, the B1xi is not just a good deal — it’s a statement that Musical Fidelity hasn’t lost the plot. No bloat, no gimmicks — just solid engineering, real-world power, and musicality that’s actually built to last.

The Musical Fidelity B1xi goes completely against the grain of the current market trend. While just about everyone—WiiM, Bluesound, Marantz, Denon, Cambridge Audio—is flooding the space with compact Class D network amplifiers that play nice with every major streaming platform and run entirely on proprietary apps, MF is making a different bet.

They’re going after a very specific kind of customer: someone who already owns a network streamer and just wants a better amplifier. More power. A better phono stage. And something built to last. Add a WiiM Ultra or a Bluesound NODE to the B1xi, and you’ve suddenly got a killer system that doesn’t rely on firmware updates to stay relevant. No, Class A/B isn’t going to win the streaming amplifier war—Class D is too efficient, too cheap, and too easy to package. But for people who already have most of the puzzle pieces in place, the B1xi is a seriously compelling piece of old-school, done-right hi-fi.

For more information: musicalfidelity.com

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