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Musical Fidelity M1 PWR

2-channel power amplifier

Item # 778M1PWRB

This item is no longer available.

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Our take on the Musical Fidelity M1 PWR

It doesn't move. If you're using it right, the lights don't even blink. A power amp doesn't really give you much in the way of operational visual feedback. So how are you supposed to tell if it's doing a good job?

Testing... is this thing on?

It doesn't move. If you're using it right, the lights don't even blink. A power amp doesn't really give you much in the way of operational visual feedback. So how are you supposed to tell if it's doing a good job?

Wow. Yes, it is.

It's simple: it's the sound. The Musical Fidelity M1 PWR stereo power amplifier is a good ally along the way to impeccable sound reproduction from almost any speaker. With a pristine 65 watts per channel and imperceptible distortion specs, it's the perfect match for anything in Musical Fidelity's inventively compact and handsome M1 series, like the M1 CLiC or the M1HPA. Everything in the series stacks due to the matched sizes.

The Musical Fidelity M1 PWR back panel

The Musical Fidelity M1 PWR back panel features a switch to change it to a monoblock amp

Don't let that stop you from pairing it with other Musical Fidelity components, however. The M3 and M6 series are also terrific choices to feed the M1 PWR. And the M1 PWR is switchable to monoblock mode via a toggle on the rear panel, so if you add a matching unit you can create a "twin-mono" stereo system with truly impressive power ratings.

Power for when you need it

The M1 PWR's universal voltage power supply and Class-D amplifier circuitry ensure that your speakers will have a steady reserve of clean power available to reproduce sudden dynamic peaks. What does this mean for the music reaching your ears? Truer imaging. More realistic soundstaging. Extended detail. Music that presents itself as the producers, engineers and artists intend it to be experienced.

You don't need a blinking light to tell you your ears are happy. They'll automatically pass the smile along to your face. How's that for visual feedback?

Product Highlights:

  • 65 watts x 2 into 8 ohms (20-20,000 Hz at 0.03% THD); 130 watts x 2 into 4 ohms
  • 4-ohm stable for use with a wide range of speakers
  • Class D switching amplifier design ensures exceptional performance with virtually any speakers
  • rear-panel switchable to 100 watt monoblock amplifier into 8 ohms; 200 watt transient peak capacity into 4 ohms
  • signal-to-noise ratio: >94 dB in stereo mode
  • designed to stack with other compact-sized Musical Fidelity M1 series components like the M1CLiC or M1HPA, but also matches well with M3 and M6 series products
  • 1 pair RCA preamp inputs with looping outputs for future expansion
  • binding post speaker terminals
  • 12-volt trigger input and output
  • detachable AC power cord
  • weight: 8.6 lbs.
  • 8-11/16"W x 3-15/16"H x 15-5/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Two-channel power amplifier
  • 7' AC power cord
  • Instructions booklet
  • Thank You Letter (inside envelope)

Hands-on research

Product Research



M1 Series Power Amp: The Musical Fidelity M1 PWR power amplifier consists of a Class-D power amp circuit giving exceptional performance into virtually any speakers. The M1 PWR features efficient switching technology with zero crossover distortion artifacts, and with just the right amount of feedback to give the best sound quality possible. It is complemented with a generous universal voltage power supply circuit, allowing astounding imaging, detail and transparency, to deliver all music types exactly as the artist originally intended.

60-watt (8ohm)/130-watt (4ohm) x 2-Channel: The Musical Fidelity M1 PWR delivers a comfortable 60-watts per channel into 8 ohms, which doubles into 4 ohms at 130-watts per channel. 

Monoblock Mode: The M1 PWR may also be used in a monoblock mode (with a matching amplifier for the other channel) in which the power output is considerably increased. In mono-block mode, achieved by simply sliding a rear-panel switch, the M1 PWR becomes a 100-watt power amplifier into 8-ohms, able to deliver 200-watt transient peak capacity into 4ohms.

Bi-Wiring (in monoblock mode): It is possible to bi-wire your suitable loudspeakers when the M1 PWR is in monoblock mode. Your speakers must have a least four terminals; two for the high frequency drivers and two more for the low frequency drivers (any shorting-links between the high frequency and low frequency terminals on your speaker must be removed). You will need a second M1 PWR to drive a pair of Bi-wired speakers.

Full-Range Frequency Response w/ High SNR: The M1 PWR's technical performance will continue to impress with superb phase integrity, frequency response (20-20k), and signal-to-noise  measurements for stereo (>94dB) and mono (>100dB) operation.

Low Distortion:  The Musical Fidelity M1 PWR offers extremely low distortion in stereo (<0.03%) or monoblock (<0.02%) mode.


Power Button w/ LED Indicators: The Musical Fidelity M1 PWR's features a Power On/Off button with dual LEDs on its front-panel. The Power LED lights up blue when the amp is turned on, and the Standby LED lights up orange when the amp is turned off.

Stereo/Mono Switch: The M1 PWR's Stereo/Mono switch allows you to configure the power amplifier for Stereo or Mono mode.

  • Stereo Mode: Stereo mode allows the unit to be used as a standard stereo (2-channel) amplifier.
  • Mono Mode: Mono mode turn the unit into a more powerful monoblock (1-channel) amplifier. A matching M1 PWR is required for stereo operation in this mode.

Temp LED: The Temperature LED (red) will come on if the unit is getting too hot internally. This could indicate excessively high current through the speaker outputs. If the Temp LED comes on, maximum power output will be internally reduced to allow the device to cool down. Continuous operation into very low impedance/short circuit may cause the unit to show. In this case, switch the unit and check wiring and speakers themselves for short circuits. Allow the M1 PWR approximately 30 minutes to cool down before attempting to turn it on again.


Stereo Analog Inputs: The Musical Fidelity M1 PWR power amplifier is fitted with a set of analog audio stereo RCA inputs to connect your preamplifier.

Note: When this unit is in Mono mode, only the Left input is active and will accept an audio signal. The Right input is inoperative in Mono mode.

Stereo Analog Outputs: The stereo analog outputs (loop output) allows for further or future expansion. These outputs pass on the input signal totally unaffected. They allows connection of external amplifier and powered subwoofer.

5-Way Binding Post Speaker Terminals: The Musical Fidelity M1 PWR is fitted with four 5-way binding post speaker terminals that will accept bare wire, pin-connectors, spade-connectors, and banana plugs (single or dual). The four 5-way binding post speaker terminals are color coded (red/black) for easy positive & negative identification.

Note:  When this unit is switched to Mono mode, the Left & Right Red speaker terminals are internally connected together. Similarly, the Left & Right Black speaker terminals are also internally connected together. As a result, the power from the two internal amplifiers is combined to form a more powerful monoblock amp.

12V Trigger In/Out: The M1 PWR is fitted with a 12V trigger input/output (3.5mm).

  • Trigger Input: The M1 power can be switched on/off by remote devices connected to its trigger input. The unit accepts 4 to 15V DC trigger inputs.
  • Trigger Output: The M1 PWR's power button will automatically switch on/off all devices that are connected its trigger output.

Detachable AC Power Cord: The M1 PWR includes a 7' detachable 3-prong AC power cord.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.