Musical Fidelity M6xi - Integrated Amplifier

Musical Fidelity proudly introduces the M6xi, the newest high-end integrated amplifier in the acclaimed M6 line. Building on the outstanding success of its predecessor, the M6si, the M6xi continues the same proven formula: massive power, uncompromising engineering, and true high-end sound, now enhanced with modern connectivity and refined internal design.

Modern systems demand modern connectivity. The M6xi now features HDMI eARC, allowing effortless integration with TVs and home theater systems while delivering true high-end stereo performance. Alongside this, new coaxial and optical digital inputs expand connectivity for a wide range of digital sources, complementing the already established high-resolution USB input.

A completely new feature is the high-quality isolated USB power output. Designed as a dedicated, ultra-clean power supply, it allows you to power modern USB streamers directly from the amplifier. The result is simple system integration and a noticeable upgrade in performance for your favourite streaming source.

For professional installations and advanced system control, the M6xi now includes RS232 integration, making it ideal for custom installations and sophisticated home audio systems.

Fully Discrete Power Amplifier - Son of TITAN

The M6xi is configured as 2 independent monobloc power amps with a separate pre amp. It is, in fact, a pre amp with 2 monobloc power amps that just happen to share the same casework. It features technology trickled down from our legendary 1kW TITAN power amp.

Internally, refinements push performance even further. The main transformer and power supply PCB are now encapsulated within a metal enclosure, dramatically reducing electromagnetic interference inside the chassis. This improvement benefits every circuit in the amplifier, but especially the newly refined phono stage.

The upgraded MM/MC phono section features improved shielding and circuit optimization, delivering lower noise, lower distortion, and greater vinyl transparency than ever before.

Even the powerhouse amplifier stage has been slightly enhanced. With improved components and increased output capability, the M6xi delivers even greater authority and control over demanding loudspeakers, while preserving the effortless musicality that defines the Musical Fidelity sound.

The result is an amplifier that combines classic Musical Fidelity high-end amplifier design with modern versatility. The M6xi delivers true high-end performance in the proud Musical Fidelity tradition and makes it more accessible than anything else in its class.

M6si In Brief

Amplifier

• High-end circuitry from our TITAN amplifier
• NEW 220Watts per channel into 8 Ohms; 320W into 4 ohms
• Fully analogue amplifier design
• Fully discrete 2x monobloc power amps
• Classic low distortion MF output stage for no crossover artefacts
• NEW PCB layout for reduced imbalances to avoid correcting by feedback
• All analogue PSUs during operation to reduce high frequency noise and EMC
• Drives power hungry speakers and gracefully manages low impedance dips
• NEW Oversized encapsulated toroidal transformer
• Extreme power reserves for proper peak power delivery and wide dynamic range

Preamplifier

• Low noise design for best THD and signal integrity at low and high volume levels
• High quality stepped volume attenuator for better channel matching than conventional potentiometer designs
• Pre Out for bi-amping with M6sPRX or active subwoofer connection
• Separate digital PCBs with meticulously careful digital circtuitry layout to minimize HF interference

Connectivity

• Balanced XLR input
• NEW optical, coaxial & HDMI inputs
• NEW USB C input with 24/192 max. resolution
• NEW RS232 for custom integration
• NEW Isolated linear 5V/2A USB A power output to power modern external streamers
• HT-input: bypasses preamp-stage for home-theater use as ultimate front L/R amp
• NEW MM & MC phono stage, improved PCB design and layout with better isolation and shielding for less noise & distortion

Mechanical Construction

• Uncompromising metal work in typical Musical Fidelity tradtion
• Heavy front, side and top panels milled from extruded aluminium profiles
• Clean, stunning and indestructable metal exterior protects against electromagnetical interference

Technical Specifications

Output

• Continuous Power, both channels driven @ 1% THD, 1kHz:
• 220W per channel into 8 Ohms;
• 320W per channel into 4 Ohms
• Continuous Power, both channels driven @ 0.09% THD, 20Hz to 20 kHz:
• 210W per channel into 8 Ohms;
• 300W per channel into 4 ohms
• Peak Power, both channels driven @ 1% THD, 1kHz:
• 280W per channel into 8 Ohms;
• 450W per channel into 4 Ohms
• 43 Volts RMS, 20Hz to 20 kHz; onset of clipping
• 121 Volts peak to peak
• Current 45 Amps peak to peak
• Damping factor 49 (8 Ohms)
• Output devices 2 pairs per channel

Line input

• THD+N < 0.007 % typical, 20Hz to 20 kHz
• Signal / noise ratio > 107dB ‘A’-weighted
• Input impedance 40 k Ohms
• Frequency response +0, –0.1dB, 10Hz to 20 kHz

Connections

• 4x Line level RCA inputs
• 1x HDMI eARC input
• 1x Coaxial input
• 1x Optical input
• 1x Line level balanced XLR inputs
• 1x Phono MM/MC input
• 1x USB type ‘C’ connector - 24-bit/192kHz
• Line level outputs 1 pair line level RCA connectors, constant level TAPE outputs
• 1 pair line level RCA connectors, preamp outputs
• Speaker out 2 pairs 4mm banana/binding posts
• 1x USB A 5V/2A power output
• 1x RS232 D-sub connector

Phono Input

• Sensitivity (nominal): 3mV MM / 0.4mV MC (for 300mV nominal)
• Gain MM/MC: 40dB / 60dB
• Signal / noise ratio: >87dB ‘A’-weighted
• Input capacitance: 220pF
• Input impedance: 50k Ohms MM / 1k Ohm MC
• Frequency response: RIAA/IEC ±0.4dB, 20Hz - 20 kHz

Power requirement

• Mains 115/230VAC 50/60Hz (factory pre-set)
• 100VAC 50/60Hz (alternative)
• Consumption 680 Watts maximum

General

• Dimensions - WxHxD (mm): 440 x 125 x 400
• Weight (unpacked / packed): 18.5 kg/ 22 kg

Further Information

Musical Fidelity M6xi - User Manual (PDF)