Musical Fidelity M6s PRX Power Amplifier - Silver

Two Hundred and Thirty Watts, Choke Regulated

The M6s PRX makes 230 watts per channel into 8 ohms. The interesting part is how it is powered. Musical Fidelity uses a Choke Regulated Power Supply, which is not what you find in most amps at any price.

A choke filters the supply passively, rather than leaning on regulation circuitry near the signal path. The measured result is a signal-to-noise ratio better than 120dB. That is where this amp pulls away from its rivals.

Distortion sits below 0.007% typical, and frequency response runs from 10Hz up to 100kHz within a single decibel. Those are numbers that hold up against amplifiers costing a good deal more than this one.

Inside the Chassis

Connectivity is more generous than most power amps offer. Two RCA line inputs are fitted alongside one balanced XLR, so more than one source can stay plugged in without a switch box sitting in front of it.

The chassis is 440mm wide, 125 high and 395 deep, and the amp weighs 19.7kg. Most of that mass is transformer and heatsink. That is simply what 230 watts a channel of linear amplification costs you.

It comes in black or silver, finished to sit alongside the rest of Musical Fidelity's M6s series, so a matching preamplifier and this amplifier look like one system rather than two.

Who Is This Amplifier Best For?

• You want a genuinely quiet amplifier — better than 120dB signal-to-noise, from a choke-regulated supply rather than regulation circuitry sitting near the signal path.
• Your speakers ask for power — 230 watts per channel into 8 ohms drives the great majority of domestic loudspeakers without the amplifier ever being the limit.
• You have more than one source — two RCA inputs plus a balanced XLR means a second source can stay connected, which most power amplifiers do not allow at all.
• Your preamplifier is balanced — the XLR input is there for the long run from preamp to amplifier, which is where single-ended cable picks up hum.
• You want separates — volume and input switching live in the preamp or streamer/DAC ahead of it. M6s is the natural partner

How Does It Connect to Your System?

Connect your preamplifier by balanced XLR, or a source by either of the two RCA inputs. Speakers go to the binding posts.

At 19.7kg it wants a shelf rated for the weight, and 395mm of depth plus room behind for cables.

Pairs Well With

Here are some great companions:

• Preamplifier: Required, and the natural next decision — see our Preamplifiers.
• Speaker Cables: Carry the current properly — see our Speaker Cables.
• Interconnects: Balanced XLR is the better run from preamp to amp — see our Interconnect Cables.
• Audio Rack: Give the amplifier a proper shelf — see our Audio Racks.

Frequently Asked Questions

How much power does it make?

230 watts per channel into 8 ohms.

What is a Choke Regulated Power Supply?

A supply filtered passively by a choke rather than by regulation circuitry near the signal path. Musical Fidelity credits it for the amplifier's signal-to-noise figure of better than 120dB.

How many inputs does it have?

Three: two RCA line-level inputs and one balanced XLR, which is unusually generous for a power amplifier.

What are the bench figures?

THD plus noise below 0.007% typical, signal-to-noise better than 120dB, and frequency response of 10Hz to 100kHz within a decibel.

How big and heavy is it?

440mm wide, 125mm high and 395mm deep, weighing 19.7kg.

What finishes are available?

Black or silver, matching the rest of the M6s series.

See It in Action

A three-way comparison against the Arcam PA240 and Cambridge Edge W:

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