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Stellar M700 Mono Amplifier

700 watt Analog Cell power amplifier pair

Built in Boulder
All units handmade in Boulder, Colorado.

Enjoy an unheard of level of control and command from your loudspeakers with the Stellar™ M700, one of the most extraordinary under $5,000 power amplifier pair ever crafted. The M700 combines the slam, linearity, control and pacing of a Class D output stage with the warmth, grace, and rich inner detail of Stellar’s Class A Analog Cell. The results are nothing short of breathtaking. Liberate all the toe-tapping energy trapped in your media library. Plumb music’s subterranean depths as your system gives you more bottom end than you thought possible. Revel in rich layers of fine, full detail. Marvel at the deep, extraordinary, wall-to-wall soundstage. Control your loudspeakers as never before. Effortless. Lush. Stellar.

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Stellar M700 Power Amplifier

Product Description

The problems faced when crafting a new power amplifier are many—delivering sufficient power, control, frequency extension, and dynamics while maintaining a perfectly layered soundstage under the most complex musical passages.

All amplifiers sound different. What determines sound quality are the components and topologies of the amp’s input voltage stage and output current stage. Each section should complement the other. Between them, the amp develops its sound. 

Stellar’s design imperatives—affordable pricing, uncompromised sonics—were major challenges solved by the invention of a unique new circuit christened the Analog Cell™. 

Stellar engineer Darren Myers had planned from the outset to take advantage of Class D’s high current, low distortion, ruler flat linearity for the output stage—knowing full well it is the input stage that determines sonic character. This critical interface between preamplifier and power amplifier is where Stellar’s magic would be unveiled; where Myers could lavish upon the music the sweet, tube-like quality of Class A biased MOSFETs. His challenge was to synergistically marry both input and output topologies, for which he invented Stellar’s Analog Cell.

The Analog Cell is the heart of the M700’s musicality, where richly overlayed layers of music’s inner details are preserved even in the most complex orchestral crescendos. The Analog Cell is a proprietary, fully differential, zero feedback, discrete, Class A MOSFET circuit, hand-tuned to capture the smallest micro dynamics without sacrificing the loudest macro dynamics music has to offer.

This product qualifies for our risk free in-home trial in the continental United States when purchased directly from PS Audio. And, trade in and save. Let us repurchase your old equipment at its full and original retail price. We’ll give it a good home and make sure you have the best power in the world. Just click the green Trade Up and Save button above these words to take advantage.

  • Mono power amplifier pair
  • Zero-loss Analog Cell input stage
  • Powerful MOSFET balanced output stage
  • RCA Single ended input
  • XLR “true” balanced input
  • 350 watts into 8Ω
  • 700 watts rms into 4Ω
  • 2Ω stable
  • Less than 0.1% thd 20Hz to 20kHz at rated power
  • Damping factor 1100 for excellent loudspeaker control
  • Front panel standby button
  • Efficient operation with very little heat
  • Dual, solid copper, plated, output binding posts
  • 27 pounds
  • Input 12 volt trigger

The Sound Advocate

Howard Milstein

Once auditioned in your system you will be captivated by their alluringly natural, neutral, and just plain outstanding sound quality. The huge amount of power they are endowed with provides sound with breathtaking exhuberence when mated with almost any loudspeaker it is married to. These units are meticulously built and sound great right from the get-go. The M700 monoblocks are a standout product that deserves all the praise one can give to it.

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Rafe Arnott

All PS Audio components I’ve encountered (or owned) are incredibly well-built and the Stellar line is no exception. They have a weight, look and feel that exudes quality belying their sub-$5,000 USD total cost and puts me in mind of gear I’ve reviewed costing double this price point.

The PS Audio Stellar ‘three-fer’ proved itself to sound far more captivating, powerful, lyrical, musical and possess a humanity to its sonic signature in playback of all types of music than I previously thought a preamplifier and mono blocks priced under $5,000 USD would be capable of. They would, without fail, elicit both an emotional and physical reaction whenever I played music through them and their lack of digital pretense and healthy dose of analog spirit was a listening experience which I embraced.

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Positive Feedback

Pete Davey

I was really able to hear the amplifiers’ real attributes: astonishing and accurate bass, with sparkling highs that had an almost tube-like sound. How did they accomplish this in such a small footprint for such an amazing price?

In the end I believe this is the top of the line in its price range. Nothing comes close—the sheer amount of power and sound quality that comes from these little chassis is nothing but pure engineering magic. Kudos to the PS Audio team for coming up with such a simple yet ingenious design. In my world of 30-somethings, there are a ton of people interested in high-end audio but don't want to spend 10k on an amplifier. Well, this is the amp that I recommend every time.

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The Audio Beat

Guy Lemcoe

“…I could not fault the sound of the Gain Cell DAC -- its neutrality and honesty were captivating, leading to compelling listening. During my time with it and the pair of M700s, I always felt they had total control over whatever music was thrown at them, in whatever format. From the understated nuance of an unaccompanied lute to the bombast of a symphony orchestra going full tilt, the laid-back drive of dub or the pulse of electronica, I not once felt deprived of any of the music’s emotion, rhythm, dynamics or detail. Whether using planar, stand-mounted or floorstanding speakers, I knew I would be rewarded with music free of noise, artifact or boredom. Used together, the Gain Cell DAC and M700s represent an intelligent, cost-effective entrance into high-end audio’s top tier….

“The PS Audio Stellar Gain Cell DAC and M700 mono amps took my system to a level that, with some recordings, was eerily close to the real thing. Paul McGowan and his crew in Boulder should be beaming with pride over the superlative performance of these components. Those making a first purchase or those seeking to upgrade must audition these electronics or risk having spent hard-earned money foolishly elsewhere.”

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Robert Deutsch

PS Audio has been on a roll. That roll continues with the Stellar M700 power amplifier. I have had nothing but good experience with PS Audio products; still, with the Stellar M700, my expectations were exceeded. Having little sound of its own, the M700 delivered well-balanced reproduction that was always faithful to the music… the Stellar M700s came ever so close to matching the sound of my high-end reference monoblocks, Theta Digital's Prometheuses—which are ranked Class A in "Recommended Components" and, at $12,000/pair, cost four times as much as the PS Audios. The Stellar M700 is an outstanding bargain.

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Stereo Times

Greg Voth

I’ve been putting source material through the rig with the PS Audio Stellar M700’s Mono amps for a month and I have been consistently impressed with their musicality and get up and go. These powerful PS Audio Stellar M700 Mono amplifiers are capable of effortlessly driving demanding loudspeaker loads to concert levels. This may be the first higher-priced component I can’t live with out... but wait, there’s more! At $2995 per pair, they’re not higher priced, just bit of a stretch for my thin wallet. If my 83 dB sensitive speakers have anything to say about it, these review amps have found a new home.

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Positive Feedback

Gary L Beard

In the Stellar M700, PS Audio has designed excellent sounding mono amps that can be the foundation of a reasonably priced high-end audio system. The analog input section is as expansive and natural sounding as the ICE amp modules are powerful and accurate. The resulting sound is a wonderful balance between expression and precision, allowing the amps to disappear within the audio chain. They clearly take on the signal they are fed, allowing a great front end to weave its audio magic.

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Roger Kanno

There are many excellent-sounding amplifiers in this price range, but few can put out anywhere near as much power as the Stellar M700, and most of those that do don’t sound as refined. PS Audio says that the Stellar M700 is one of the most extraordinary monoblocks ever sold for less than $5000/pair. I have to agree. The Stellar M700 is my new favorite entry-level high-end power amplifier.

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PS Forums

Edward Weinman

I have had the 700's for several months now and all I can say is..."WOW!" Even after the burn in period at PS Audio, that was not the end of the burn in process. It's taken a few more months and I don't even know now if they will continue to do this. However, I can't tell you enough of what these amps have done for me in terms of detail and no compression of sound in loud passages of music/film. For me, they are a revelation! It's only been in the last month or so that actors, orchestras, soloists have exited the speakers and are in my home theater room! The Maggies are so much more in richness and dynamics that I really can't believe it! I had a gut feeling prior to purchasing them that I was in for something very special and that's putting it mildly! I've received Paul's emails over the years and actually this was a blind purchase but the price was certainly right for each of the six amps and the trade in of my Carver 7 channel amp was financially sufficient enough that the value given me would cover one and a half of the 700's!

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Stellar M700 Mono Amplifier

Unit Weight13 lbs [5.9 kg] (each)
Unit Dimensions17”W x 3”H x 12”D (13"D w/connectors)
17”W x 6”H x 12”D (Stacked)

Shipping Weight16.5 lbs [7.5 kg] (each)
Shipping Dimensions22”W x 8”H x 17”D (each)
Color OptionsBlack
Voltage Options
(Factory set only)
Japan 100V
North America 120V
Europe/Asia/Australia/New Zealand 230V
Mains Power InputsIEC C14
Idle Power Consumption23W
Accessories IncludedUS (NEMA 5-15P) (all versions)
Schuko (CEE7/7) (230V version)
UK (BS 1363) (230V version)
Audio InputsRCA (Unbalanced)
XLR (Balanced)
Speaker Outputs Copper base nickel plated binding posts (2 pair)
DC Trigger Input 3.5mm 5-15VDC
Warranty3 years parts and labor


Gain30.5dB +/-0.5dB
Sensitivity for rated output power1.6V
Noise[email protected] Watts < -105dB
Input impedance Unbalanced 50KΩ
Balanced 100KΩ
Output Impedance50Hz, 2.8VRMS <0.007Ω
Damping factor50Hz. 2.8VRMS
8Ω >1100
4Ω >550
Frequency Response2.8VRMS into 4Ω
10Hz – 20KHz +/- 0.5dB
10Hz – 50KHz +0.1/-3.0dB


1KHz, 1W/4Ω<0.02%
10-20KHz, 1W/4Ω<0.02%
10-50KHz, 1W/4Ω< 0.05% (90kHz BW)
1KHz, 87.5W/4Ω< 0.015%

Output Power

120vac mains, 1kHz, 1% THD
8Ω350W minimum
4Ω700W minimum
2ΩStable for musical transients


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