Musical Fidelity M8xi


M8xi, The latest Super Integrated amplifier in Musical Fidelity’s history of high-powered designs, M8xi is a separate DAC, Pre, and two monoblock amplifiers

Musical Fidelity M8xi

The latest Super Integrated amplifier in Musical Fidelity’s long and illustrious history of high-powered designs (which started with the A1000 back in 1990) is a high-end marvel that combines masses of power with true audiophile sonics and ultimate convenience.

Musical Fidelity M8xi front

Amplifier front

In essence, the M8xi is a separate DAC, pre-amplifier and two monoblock power amplifiers housed within one large chassis.

With a development logic that saw the design team approach each of the three sections indpendently, the M8xi is capable of perfoming to an exceptional standard in each department.

The entire signal path employs a low-feedback configuration, as with previous Musical Fidelity designs.

However, with the M8xi changes have been made to achieve higher power, lower distortion and better overall sound quality.

The bridged output stage efficiency has been increased, yielding about 10% more power while maintaining managable voltages on the supply rails; and the whole driver stage has been designed to operate largely in pure Class A.

The result of this combination is a wide sound stage that allows both micro and macro dynamics to have an impact.

Vocals have more subtlety, detail and presence. Large scale music has a depth, width and incredibly dynamic presentation.

In essence, the M8xi sounds like a small Class A amplifier but with huge power.

The most striking aspect of the M8xi design is the high power output, generously rated at 550W into 8Ω (870W into 4Ω and Peak 1.6kW into 2Ω).

The purpose of this power is to drive almost any speaker available on the commercial market today with comfort and control, regardless of bigger and/or insensitive designs.

The output devices themselves are high-stability Darlington pairs, and they are capable of delivering such high output largely thanks to the generously specified transformers. The power amplifier is laid out in true dual-mono with dedicated power supplies for each channel, for absolute signal integrity.

The pre-amplifier of the M8xi is designed just as a dedicated pre-amplifier would be, largely operating in Class A and running off its own independent power supply.

Featuring both XLR and RCA inputs, it employs low-noise op-amps in all sections for maximum signal integrity.

The laser-trimmed volume control has a precision-matched position attenuator, which guarantees precise imaging and soundstage integrity whether being played quiet or loud.

As is common amongst other Musical Fidelity amplifiers, the M8xi also boasts a switchable Home Theatre (HT) input. This input couples directly to the power amplifier stage, allowing for a suitably specified AV processor to control the home cinema volume levels while benefiting from the sonic character of the Musical Fidelity.

The Musical fidelity M8xi also features XLR and RCA balanced outputs, for wider system applications. There are variable outputs for connecting to additional external amplifiers, as well as an RCA fixed stereo output for analogue recording or “tape out” applications, such as connecting an external headphone amplifier.

The M8xi also boasts a five input DAC, powered from its own dedicated power supply.

Based around the Texas Instruments PCM5242 low-distortion and low-noise DAC chip, the M8xi has two coaxial (S/PDIF), two optical (S/PDIF) and one asynchronous USB Type-B input.

The coaxial and the USB inputs are capable of supporting hi-res audio streams up-to 24-bit / 192kHz, and the optical input is capable of supporting up-to 24-bit / 96kHz. For maximal performance, all data streams are up-sampled and re-clocked by an internal converter to reduce jitter and remove unwanted artefacts in the sound.

The M8xi was a huge technical challenge, but thanks to an extensive R&D process it delivers in all aspects with its rich sound and extensive feature set.

Finished in an industrial chassis with an anodised aluminium front panel and large side-mounted heatsinks, it is a successful continuation of Musical Fidelity’s history of producing true Super Integrated amplifiers.

Key Features:

  • Super integrated amplifier with 500W+ per-channel output
  • One chassis with separate DAC, pre-amp and monoblocs inside
  • Sophisticated internal layout
  • Purpose-designed transformers
  • Industrial chassis with anodised aluminium front plate and heatsink sides
  • Five DAC inputs with support for Hi-Res Audio
  • Exceptional sonic performance
  • Able to drive any loudspeaker with ease

Musical Fidelity M8 xi Specifications

Musical Fidelity M8 xi Specifications

Rear panel Musical Fidelity M8 xi

Power Output: 550W per-channel (8Ω)

870W (4Ω), Peak 1.6kW (2Ω)

THD (+noise): <0.004% typical, 20Hz to 20 kHz (XLR)
Signal to Noise Ratio: > 86dB ‘A’-weighted (XLR)
Frequency Response: +0 , -1dB, 10Hz to 100 kHz
Inputs (analogue): 4 x pairs line level RCA connectors

2 x pairs line level XLR (balanced) connectors

Inputs (digital): 2 x Coax S/PDIF up to 24 bit 192kHz

2 x Optical S/PDIF up to 24 bit 96kHz

1 x USB B Asynchronous USB up to 24 bit 192kHz

Outputs (analogue): 1 x pair line level RCA fixed

1 x pair pre-out RCA variable

1 x pair line level XLR variable

Outputs (digital): 1 x Coax S/PDIF up to 24 bit 192kHz

1 x Optical S/PDIF up to 24 bit 96kHz

Dimensions (W x H x D): 483 x 184 x 510mm
Weight:  46kg
M8xi Silver

Additional information


Black, Silver


Musical Fidelity

Musical Fidelity has been designing and manufacturing Hi-Fi electronics for over thirty years and  are proud to have become one of the best-known brands in the Hi-Fi industry. They are driven by a passion for wonderful music and the challenge of world-class engineering. They approached each new design by looking for the absolute best solution to a given challenge and embrace new technologies in our designs as well as developing more traditional methods for even greater performance. 1982 Their first product - The Preamp – launched to rave reviews. Followed by shoebox-style Dr Thomas power amp. 1984 Launch of A1 integrated amp, ‘the most important development so far in the renaissance of the UK hi-fi scene’ (Hi-Fi Answers). 1986 New A370 Power Amp proclaimed ‘the best power amp I’ve ever heard’ (Hi-Fi Answers). 1987 World’s first high-end DAC- Digilog – makes debut 1988 Another world first: MVX preamp, combining tube circuit topology with transistors. SA470 launched: 86Kg power amp running 99% in Class A 1992 A1000 integrated released, featuring pure Class A power amp section 1993 Classic valve-driven Tubalog DAC goes on sale 1995 X Series launches with X-10D Class A triode line stage: ‘the most dramatic sonic enhancement you’re likely to hear!’ (F1). 1997 Nu-Vista Preamp launched, using miniature, metal-cased nuvistor tubes. All 500 units sold within three months. X Series expands with X-ACT DAC, praised for 'smooth, easy-going sound' (What Hi-Fi?) 1998 X-24K upsampling DAC released: ‘capable of getting sound to die for’ (Stereophile). X-Ray CD player launched. Described as ‘the sort of object you just want to fondle’ (Hi-Fi News) ‘a thrilling, substantial and satisfying listen’ (What Hi-Fi?) and ‘Hi-Fi meets nuclear warhead’ (T3). 2000 Futuristic CD-PRE 24 arrives, combining a high-quality CD transport, DAC and preamp. On Hi-Fi says it ‘represents a combination of features, functional performance and affordability that seems an audiophile dream come true’. Debut of Nu-Vista M3 pre/power amp, including discrete Nu-Vista power amp modules with choke regulation. ‘This is what hi-fi should be all about’ (Gramophone). X-DAC V3 released, offering ‘stunningly good measured performance’ (Stereophile). 2002 World’s first audio application of trivistor tubes in new Tri-Vista series, including legendary Tri-Vista 21 ‘Super DAC’. 2003 Flagship kW pre-amp and kW power amp launched: ‘the very finest amps you can buy...the MFs redefine audio standards’ (What Hi-Fi?) Next up: kW 500 super integrated amp with twin-triode tubes. Hi-Fi News said, ‘For one rare reviewing occasion I could not find a thing to fault about the musical presentation of an amp’. Limited-edition M1 turntable released. Considered one of the best-engineered decks ever, it’s now a collector’s item, fetching above its original price. 2004 Supercharged X-DAC V8 introduced, with switchable tube buffer and extra-heavy-duty power supply. ‘For its superb performance as a detailed, sweet-sounding DAC, the X-DAC V8 stands on its own’ (Stereophile). X-150 wins European Stereo Amplifier of the Year, EISA Awards 2004-2005. 2006 Debut of kW250S one-box wonder, packing in dual 250-watt monobloc amps, tube hybrid preamp, phono stage, 24-bit 192K upsampling CD player, FM/DAB tuner and iPod input. 2009 Meet the mighty TITAN: 1kW per channel dual monobloc design with external power supply. Hi-Fi News was ‘Smitten… The Titan is the best power amplifier I’ve used’. Reference-standard Primo pre-amplifier released; pure Class A with 14 hand-picked ECC81 2011 New M1 CLiC unites analogue and digital sources under universal control. Wins European Network Music Player, EISA Awards 2011-2012. 2012 Line-up expands to meet every hi-fi need and budget. Highlights include the AMS CD/DAC – our finest digital product yet - and AMS100, the world’s most advanced pure Class A amp


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