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NAD Masters Series M27

7-channel power amplifier

Item # 745M27

Good luck finding a home theater receiver that can match this amp's power output and detailed, spacious sound.

Good luck finding a home theater receiver that can match this amp's power output and detailed, spacious sound.

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Item # 745M27

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About the NAD Masters Series M27

No-compromise home theater sound

Why get a separate preamp and power amp instead of a home theater receiver? Because you simply can't fit this much amp into a receiver. The Masters Series M27 is the most powerful amp NAD has built to date, offering 180 watts per channel with virtually no distortion. That power rating, like all of NAD's power specs, is a bit conservative. And it was measured driving all seven of this amp's channels. That is some serious power. Good luck finding a receiver that can match that output and sound transparent doing it.

No-compromise home theater sound

Why get a separate preamp and power amp instead of a home theater receiver? Because you simply can't fit this much amp into a receiver. The Masters Series M27 is the most powerful amp NAD has built to date, offering 180 watts per channel with virtually no distortion. That power rating, like all of NAD's power specs, is a bit conservative. And it was measured driving all seven of this amp's channels. That is some serious power. Good luck finding a receiver that can match that output and sound transparent doing it.

NAD Masters Series M17 and M27 preamp/processor and seven-channel power amplifier

Together with the M17 preamp/processor (sold separately), the seven-channel M27 power amplifier forms an incredibly dynamic and powerful home theater system.

Hybrid digital design

The M27 employs the latest state-of-the-art Class D technology. It's come a long way over the years, and the M27 represents the pinnacle of Class D performance. It employs nCore®'s revolutionary amplification, with a hybrid analog/digital design that uses negative feedback to cancel out virtually all audible distortion. This allows the M27 to deliver clean, detailed sound with the spacious soundstage that audiophiles crave.

Thunderous sound for movies

Movie soundtracks are not static. They ebb and flow, with quiet passages suddenly erupting with loud sound effects. A great amp brings movies to life by reproducing these dynamic changes accurately. That's a direct result of NAD's PowerDrive™ technology. It can sense the average output power required for your speakers, reserving powerful bursts for demanding scenes or music passages. This ensures it can handle a wide variety of speakers and offer superb accuracy and fluidity, so movies and music sound more lifelike. Worried that those loud movie sound effects could damage your speakers? NAD's SoftClipping™ will protect them by limiting the amp's output before speaker-damaging distortion takes its toll.

Smaller than you might expect

With so much power at its fingertips, you might expect the M27 to be massive. But it's relatively sleek compared to similarly rated amps. Class D amplification allows for a more compact chassis, so you won't need a wheelbarrow to get it in your house. The digital output stage also means it won't run hot, offering placement flexibility without making ventilation your only priority. The M27's styling is designed to match the NAD Masters Series M17 preamp/processor, for a seven-channel home theater system that will astound you with its power and grace.


Product highlights:

  • 180 watts x 7 channels into 8 ohms (20-20,000 Hz) at 0.005% THD
  • 4-ohm stable for use with a wide range of speakers
  • innovative nCore Class D technology offers robust output, energy efficiency, compact size, accurate sound, and minimal distortion
  • PowerDrive circuit with automatic speaker impedance sensing delivers maximum dynamic, clean power output regardless of speaker load
  • SoftClipping circuit protects speakers by limiting distortion caused by high volume levels
  • high-current, low-distortion power supply for clean sound
  • all-discrete circuitry offers minimal noise and distortion
  • signal-to-noise ratio: 98 dB
  • balanced XLR and unbalanced RCA preamp inputs for all seven channels (switchable)
  • binding post speaker terminals for seven speakers
  • 12-volt trigger
  • detachable AC power cord
  • 17-1/8"W x 6-3/16"H x 15"D
  • weight: 31.1 lbs.
  • warranty: 3 years
  • Our 60-day money-back guarantee
  • MFR # M27

What's in the box:

  • 7-Channel power amplifier
  • 68" AC power cord
  • 4 Magnetic feet
  • Cleaning cloth
  • USB thumbdrive
  • Quick Setup Guide
  • Warranty Card
  • Cleaning Instructions

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NAD Masters Series M27 reviews

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"If I push her any harder Captain,

Crutchfield customer from Douglasville, GA on 8/8/2019

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Sounds OK, but did not met the expectations of the price. I imagined this would blow the roof off, but all it does is blow. "Scottie, can you give me more power?"



Crutchfield response on 8/19/2019
This customer contacted our Customer Support team and set up a return. Purchases from Crutchfield can be returned or exchanged within 60 days.

0 of 0 found this helpful

Fantastic sound

Crutchfield customer from Phoenix, AZ on 4/5/2019

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I never heard my music the way it sounds now. I currently have M27 added to SR8012, and my speakers suddenly lit up.

Pros: Sound clarity Musicality Design

Cons: Nothing

Crutchfield response on

2 of 2 found this helpful

NAD Masters Series M27

Guest from Houston, tx on 11/1/2017

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After countless hours of research , online , in store , and multiple home theater mags I settled on the NAD M27 and I couldn't be happier. It may be cliche to say I'm hearing my music like never before. First album I listened to was Pink Floyd the Wall and it was like listening to it for the first time. No words can describe the new appreciation for this album I now have thanks to this AMP. Watching movies were equally amazing with sounds of the explosions and gun shots almost too real. My Current Setup using Marantz SR7010 as Preamp for the 7 Primary Channels Fronts - 2 Sonus Faber Chameleon T Center - 1 Chameleon C Rears - 2 Martin Logan Edge Rear Surround 2 - Martin Logan Electro Motion R Not currently running to an Amp (I will probably add another M27) Atmos - 4 Martin Logan Helos 22 Subwoofers 2 REL Subs 1 is a REL T/9i (Front) 1 is a REL T/5i (Back) When listening to the Pink Floyd Album I was using only the 2 Fronts and the Subs and I didn't know my 2 fronts could sound so good......



Crutchfield response on

6 of 7 found this helpful

Must be a good match with your speakers

Brian from San Jose, CA on 4/16/2017

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Detailed but sounding Airy and digital. You must make sure its a good match with your speakers. I ran them with my Totem Element Earths and it sounded too bright and lacked in bass.

Pros: Detailed, dynamic, 7 channels. Price. Thanks to Crutchfield's return policy, if it doesnt work for you, it can be returned.

Cons: Lacks low end bass, bright and airy with certain speakers.

Crutchfield response on

5 of 9 found this helpful

Fantastic Amp

Stephen from Atlanta, GA on 4/26/2016

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I just unpacked the M27 from the box and swapped it in powering my Martin Logan Motion center/surrounds and the Sonus Venere fronts. First impression is WOW. Very nice amp. Articulate, powerful, dynamic, tight. I'm using it with a Marantz AV8802a and the combo sounds fantastic. The M27 is, as everyone says, quite a beautiful piece of gear. I was concerned about corrupting my black rack with a silver piece, but it looks fine and important - as if I selected something special to fill the slot - as I did. Packaging was quite a cut above average with a fancy black inner-box with no foam, but rather, constructed black cardboard protection units and small black boxes containing the power cord, the feet, and other info. The amp is wrapped in a black poly-cloth sack. No foam, no plastic bags: NAD want you to feel good about this thing even before you hear it. It really fits exactly what I was looking for in terms of power, weight, and especially sound quality. It runs a lot hotter than I expected - similar to a class A/B in the same power range, but that's OK. Not cheap, but it's a first class execution.

Pros: Great Sound, Small Size / Weight

Cons: Runs about as hot as any class A/B amp - so it needs good ventilation.

Crutchfield response on

20 of 20 found this helpful

M17 / M 27 Combo

JoeP from Maryland on 5/17/2015

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I have both the M17 and M27. My most recent upgrade started with the Sony 3000ES. It is a great unit and loved it. But it is a little underpowered for my B&W CM10 S2 speakers and a 7.1 setup. So I jumped into the pond and upgraded to the M17/27 combo. I was very worried about the current 4k and audio standards mess but after speaking with the NAD rep became convinced the MDC modules would future proof me for at least the next 5 or so years. But back to the M27. This is an amazing unit for the money. I did listening reviews of the Classe and McIntosh amps at 2x the price and had a hard time telling the difference. But compared to the Sony 3000ES - which was no slouch - it was an immediate upgrade. Clarity - that is the best thing I can say about the sound. It is very clean and I began to hear instruments in my music and sounds in my movies that I previously did not notice and/or did not recognize. Plus - when you can it up - there is no listening fatigue at higher volumes. I can listen for extended periods without the need to turn it down. The one issue with this amp and the corresponding M17 pre amp is that it makes great music / movies sound fantastic and it makes poorly recorded material sound ... poor. Where the Sony played most of what I listened to at a consistent level of quality - this amp is so good that you really notice good and bad recordings - which I assume is a good thing. This also applies to TV. It is expensive but a value for the quality.

Pros: * Clean sound * You will hear sounds in the music you normally do not hear * 7 channel amp has very good music and movie sound * Takes either XLR and/or Analog input preamp on each channel - user selectable

Cons: * Makes poorly recorded music and / or TV sound pretty bad * Pricey

Crutchfield response on

28 of 28 found this helpful

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More details on the NAD Masters Series M27

Stacey B.

Product Research


Seven Channel Power Amplifier: The NAD M27 seven channel power amplifier can effortlessly create a truly realistic surround sound experience when mated to NAD's M17 Surround Sound Preamp Processor (745M17, sold separately). Rated at 180W continuous power per channel, the M27 will provide over 300W dynamic power per channel with all channels driven. The M27 will pump out all the power you  need into difficult loads to follow the complex dynamic peaks in your movies and music. The M27 has power reserves to meet the demands of the latest high-resolution digital soundtracks. Thanks to the advanced nCore amplifier technology, all this monster power comes at a lot less cost than traditional technology and delivers more power and performance.

Hybrid Digital Amplification: The NAD M27 seven channel power amplifier is using the latest nCore amplifier technology licensed from Hypex which offers distortion below measurement, ultra-high damping factor, and unconditional stability with any speaker. The result is tight, detailed sound with amazing control and transparency. With nCore, Hypex has refined their amplifier concept to new levels of perfection by improving the modulator for more accurate feedback subtraction and PWM generation. The all-discrete driver and output stage have also been improved for lower open-loop THD as well as lower idling losses, normally conflicting requirements with conventional IC driver circuitry. An added control loop incorporating an integrator with adaptive clipping enables 20dB more feedback to be used across the audio band because of its extremely low-phase shift resulting in a dramatic reduction in distortion across the audio band. This is added to nCore's already amazing characteristics of load invariance and high current capability, common characteristics of great-sounding amplifiers.

NAD PowerDrive: NAD's PowerDrive circuit delivers very high dynamic power and low impedance drive to accurately control loudspeakers, resulting in remarkably musical and relaxed sound. PowerDrive gives the M27 maximum power no matter what you throw at it; and without the energy drain. NAD's PowerDrive technology measures each channel's dynamic impedance individually and computes the optimum power supply voltage required to drive the output stage for maximum power and efficiency. Control for PowerDrive is derived by sensing the average output power, applying a time constant, and then cleanly hard clipping the signal thus limiting it to the rated continuous clipping power over a sustained loading.

SoftClipping: NAD's exclusive SoftClipping feature is also included to protect your speakers (and ears) from damaging clipping distortion. NAD's Soft Clipping circuit gently limits the output of the M25 to minimize audible distortion when the amplifier is over-driven. Each channel is individually protected and has its own front panel LED, which turns red when the circuit engages. While Soft Clipping can be left on at all times to reduce the likelihood of audible distortion from excessive volume settings, you can also turn the circuit off for critical listening if you prefer.

Balanced & Unbalanced Connectivity: The M27 can accept both balanced (XLR) and single-ended (RCA) inputs. It also features high-quality, gold-plated, color-coded binding posts for speaker connection. These binding posts will accept bare wire (16-10AWG), pin-connectors, and banana plugs (single only).

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Customer Q&A

Crutchfield asked: Why did you buy this?
clean power to all channels [ Raymond  Jul 28, 2016 ]
I did a lot of research reading reviews - I needed an amp in this power range, and am hoping the Class D design will keep the weight and heat down while still sounding great. All reviews indicate that it will deliver. [ Stephen  Apr 04, 2016 ]

1 question already asked

can this drive 4 ohm speakers?
[ dagobah  Jun 07, 2019 ]
1 answer
Yes. The NAD M27 is rated for 8 ohm and 4 ohm. It also claims to run down to 2 ohm. I am driving KEF LS50 for LCR which are rated for 8 ohm nominal with 3.2 ohm minimum. Also, I am driving a pair of 4 ohm passive subs. The subs do not appear to go below 4 ohm.
[ Blair  Jun 07, 2019 ]

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