Stellar · Monoblock pair

Stellar™ M1200 Monoblocks

The warmth of vacuum tubes, with seemingly infinite headroom.

$6,998 / pair

Save up to $1,750 with a trade-in.

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The PS Audio Home Experience

Try it risk-free for 30 days in your own system. Love it or return it.

Designed for large or hard-to-drive speakers

  • Power 600 W into 8Ω · 1,200 W into 4Ω
  • Design Mono pair, one per speaker
  • Vacuum tube input stage

The Absolute Sound 2027 Editors’ Choice

Power amplifiers

What reviewers say

The M1200 is not a good amplifier; it is a superb one

TThe Absolute SoundJacob Heilbrunn, 2021

Its transient speed can only be described as stunning.

TThe Absolute Sound2025

Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience

SStereophile2025

Why choose it

Tube warmth, with 1,200 watts

A vacuum tube input stage brings the warmth of tubes, and the output stage delivers 600 watts into 8Ω and 1,200 into 4Ω. Stable down to 2Ω, so hard-to-drive speakers stay in control.

Where it fits

Power amplifiers deliver only the number of watts required by your speaker to achieve the desired loudness. Even the most powerful amplifiers deliver only what's asked of them. What's been missing in most amplifiers is adequate headroom and effortless linear performance—something only a vacuum tube-based powerhouse like the M1200 can unquestionably provide.

Read more

Power amplifiers deliver only the number of watts required by your speaker to achieve the desired loudness. Even the most powerful amplifiers deliver only what's asked of them. What's been missing in most amplifiers is adequate headroom and effortless linear performance—something only a vacuum tube-based powerhouse like the M1200 can unquestionably provide. From the most subtle of details to unheard of explosive dynamics, Stellar M1200 represents the pinnacle of high-powered musicality that must be heard to be believed. Regardless of the power demands—or power limitations—of your loudspeakers, Stellar M1200 is the perfect choice if effortless musicality is in your future.

The rich warmth and musicality of vacuum tubes.

Design

How it's built

To preserve both uncompressed dynamics as well as the tiniest of nuanced details requires a cost-no-object input stage, like that of a high-performance vacuum tube. The amp's delicate input signals, now faithfully preserved by its vacuum tube input, then need to be amplified without restriction by taking advantage of a new type of Class D output power module.

Read the full design story

To preserve both uncompressed dynamics as well as the tiniest of nuanced details requires a cost-no-object input stage, like that of a high-performance vacuum tube. The amp's delicate input signals, now faithfully preserved by its vacuum tube input, then need to be amplified without restriction by taking advantage of a new type of Class D output power module. This extraordinarily high current, low distortion, MOSFET output stage combines state-of-the-art topologies with decades of design and listening experience to produce what we believe is the most musically satisfying amplifier of its kind.

1,200 W
into 4Ω, per monoblock
600 W
into 8Ω
2Ω
stable
>1,100
damping factor

01

Overview

The Stellar M1200 mono amplifiers solve a classic problem with nearly every power amplifier made: sonic compression. When the orchestra gets loud and complex, or the band really starts to rock it out, most power amplifiers get out of their comfort zone and we hear their stress and strain as compression.

Read more

The Stellar M1200 mono amplifiers solve a classic problem with nearly every power amplifier made: sonic compression. When the orchestra gets loud and complex, or the band really starts to rock it out, most power amplifiers get out of their comfort zone and we hear their stress and strain as compression. The M1200 was designed to play any music into any loudspeaker with zero compression. Rated at 600 Watts into 8Ω and a whopping 1200 Watts into 4Ω, the M1200 combines the best of two worlds: ultra-linear, high-current, ICE Edge Class D technology for the output stage; and a discrete, Class-A vacuum tube for the all-important input stage. The M1200’s rich, warm, and beautifully nuanced reproduction of music comes first from the zero feedback, class A vacuum tube input stage. Here nothing is lost in its hand-selected 12AU7 vacuum tube, fed from its own analog power supply.

02

The Vacuum Tube Input

The power amplifier is technology always present in stereo systems. Yet, despite the fact everyone uses them, few appreciate the power amp’s critical role in preserving music’s nuanced details because most amplifiers fail to preserve them.

Read more

The power amplifier is technology always present in stereo systems. Yet, despite the fact everyone uses them, few appreciate the power amp’s critical role in preserving music’s nuanced details because most amplifiers fail to preserve them. Overtones from plucked instruments, subtle cues defining placement, depth, soundstage width, and transient decays are often lost in the power amplifier. The M1200 loses nothing because of its vacuum tube input stage. In the M1200 a zero feedback class A vacuum tube input stage captures every whisper of music while preserving intact the most dynamic crescendos and quick rise time transients with zero loss. The listening experience with the M1200 is nothing short of a revelation. Where most amplifiers do their best to preserve dynamics, they fail to present them as if they were live. The M1200 eliminates the tendency of nearly every power amplifier to change its sonic character as the music gets louder.

03

Output Stage

The Stellar M1200 has a massive power supply and ultra-linear, high-wattage power amplification stage based on a modern Class D ICE module. Class D output stages provide near-perfect linearity, low distortion, and high efficiency.

Read more

The Stellar M1200 has a massive power supply and ultra-linear, high-wattage power amplification stage based on a modern Class D ICE module. Class D output stages provide near-perfect linearity, low distortion, and high efficiency. Modern Class D amplifiers, like the type used in Stellar, extend high frequencies to about 50kHz. Human hearing limitations are 20kHz, though most listeners rarely have hearing exceeding half that. Providing excellent frequency extremes, low distortion, high efficiency, high damping factor, and a generous and powerful output of 1200 watts into the most common loudspeaker loads of 4Ω, the M1200 is nothing short of breathtaking. The massively powerful nature of the M1200 works well with any loudspeaker—big or small—providing huge amounts of headroom and effortless sound quality for even the most demanding orchestral crescendos.

Features

At a glance

  • Mono power amplifier pair
  • Zero-loss tube input stage
  • Powerful mosfet output stage
  • Rca single ended input
  • XLR "true" balanced input
  • 600 watts per channel 8ω
  • 1200 watts rms into 4ω
  • 2ω stable
  • Ice edge technology
  • Damping factor > 1100
  • Front panel standby button
  • Very little heat production
  • Dual, solid, copper plated output posts
  • 27 lbs. each

Specifications

Full specifications
Stellar M1200 Mono Amplifier
Unit Weight27 lbs [12.2 kg] (each)
Unit Dimensions17”W x 3.75”H x 12”D (13"D w/connectors) 17”W x 7.5”H x 12”D (Stacked)
Shipping Weight29 lbs [13.15 kg] (each)
Shipping Dimensions22”W x 8”H x 17”D (each)
Color OptionsBlack Silver
Vacuum tube type12AU7
Voltage Options (Factory set only)Japan 100V North America 120V Europe/Asia/Australia/New Zealand 230V
Mains Power InputsIEC C14
Idle Power Consumption27W
Power Factor>0.9 @ rated power 4Ω
Accessories IncludedUS (NEMA 5-15P) (all versions) Schuko (CEE7/7) (230V version) UK (BS 1363) (230V version)
Audio InputsRCA (Unbalanced) XLR (Balanced)
Speaker OutputsCopper base nickel plated binding posts (2 pair)
DC Trigger Input3.5mm 5-15VDC
Warranty3 years parts and labor
Signal
Gain30.5dB +/-0.5dB
Sensitivity for rated output power2.08V
Signal to Noise1kHz@1200 Watts > 112dB
Input impedanceUnbalanced 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 – 45KHz +0.1/-3.0dB
THD & IM
1KHz, 1W/4Ω< 0.005%
10-20KHz, 1W/4Ω< 0.01%
1KHz, 150W/4Ω< 0.02%
Output Power120vac mains, 1kHz, 1% THD
8Ω600W minimum
4Ω1200W minimum
2ΩStable for musical transients

Compare

How it compares

M800M400S400S200M1200This oneM700S300Strata
Price$29,998 / pair$17,998 / pair$9,999$7,999$6,998 / pair$3,498 / pair$1,999$3,499
Speakers & roomLarge rooms, any speakerLarge floorstanders, medium to large roomsFloorstanders, typical roomsBookshelf or efficient speakers, smaller roomsLarge or hard-to-drive speakersFloorstanders, typical roomsBookshelf speakers, smaller roomsAdd your speakers, bookshelf or floorstanding
Power400 W into 8Ω · 800 W into 4Ω200 W into 8Ω · 400 W into 4Ω200 W into 8Ω · 400 W into 4Ω, per channel100 W into 8Ω · 200 W into 4Ω, per channel600 W into 8Ω · 1,200 W into 4Ω350 W into 8Ω · 700 W into 4Ω140 W into 8Ω · 300 W into 4Ω, per channel—
DesignMono pair, one per speakerMono pair, one per speakerStereo, one boxStereo, one boxMono pair, one per speakerMono pair, one per speakerStereo, one boxIntegrated, one box
What sets it apart50 W of Class A bias: 99% of typical listening in pure Class A30 W of Class A bias10 W of Class A bias per channel10 W of Class A bias per channelVacuum tube input stageStable down to 2ΩDual mono, a separate power supply for each channelMoving magnet and moving coil phono, plus a Class A headphone amp
What's inside———————Streaming DAC, preamplifier, phono stage, amplifier

Build your system

What it pairs with

Trade Up and Save

Save up to $1,750 on your Stellar M1200 Monoblocks

Your old gear is worth more than you think. PS Audio credits the full original retail value of what you trade, up to the limit, straight off your new purchase.

  1. Tell us what you have. Press Start your trade-in and list your gear. Nearly any working hi-fi component counts, from any brand.
  2. Pay the adjusted price. At checkout you are charged only the price after your credit. Our sales team reviews every trade within 48 hours.
  3. Send yours back. We email a return label number. You have 30 days to ship your trade.
Start your trade-in
The fine print

What we accept. Nearly any hi-fi make and model at component level: a preamplifier, power amplifier, DAC, phono stage, loudspeaker pair, turntable, headphones or CD transport. It must work and be in respectable cosmetic condition.

What we don't. Broken or non-working products, and most accessories, phono cartridges, power cables and interconnects. Exceptions can be made based on value.

Several items? Yes. Trade as many as you like, up to the credit cap. Use "Add another" on the Trade Up form.

Not sure it qualifies? Call 800-PSAUDIO (800-772-8346) or email sales@psaudio.com, and a real person will answer.

Reviews

More reviews

"There are few, if any, amplifiers that will grip the bass drivers as tenaciously as the M1200.

Its transient speed can only be described as stunning. "

AAbsolute Sound Magazine2025

"Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience"

SStereophile Magazine2025
Read the full review

I just upgraded from M700s to M1200s.

Punch, authority, better separation of instruments, and loads of new detail. I got chills listening to some familiar symphony tracks! This is such a rewarding endeavor! I was very satisfied with my system before this latest upgrade and yet I now have renewed enthusiasm and...

FForum memberOwner · PS Audio forum · 2025

As it happened, however, my system was in flux, with gear whizzing in and out the door; so, I put the M1200s first on the WAMM main loudspeakers without harboring too great expectations.

Boy, was I in for a surprise! The M1200 is not a good amplifier; it is a superb one

JJacob Heilbrunn, The Absolute Sound2021
Read the full review

PS Audio Stellar M1200 proved itself to be one hell of an amplifier when it was delivering the sound of all the pianos I auditioned

RRoger Hargreaves, What HiFi2021
Read the full review

Questions for a specialist?

We're happy to help with system matching and upgrades. Talk to a real person at 800-PSAUDIO, Monday to Friday, 8:30 to 5 Mountain Time, or email sales@psaudio.com.

Contact a specialist

Outside the US?

Buy or audition through an authorized PS Audio dealer in your country. Can't find one near you? Contact us directly.

Find your local dealer

Hear it in your own room

Stellar M1200 Monoblocks

$6,998 / pair

  • 30-day in-home trialThe PS Audio Home Experience. Love it or return it.
  • Save up to $1,750 with a trade-inCredit comes off the price at checkout.
Add to cartTrade up your gear and save
Silver, pair
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Silver, pair
href="/products/m1200-amplifier?variant=43692480037154" class="link" >M1200 Amplifier Pair

M1200 Amplifier Pair

$6,998.00
Shipping calculated at checkout.
Details
The Stellar M1200 monoblock power amplifier combines the rich warmth and musicality of vacuum tubes with the jaw-dropping power and seemingly infinite headroom of a 1200 watt high-performance output stage.
Home Audition

Get 30 days to listen to your M1200 Amplifier Pair and see if you like it. If not, send it back.

Shipping

UPS Ground USA
FedEx International

M1200 Amplifier Pair

At home

Where it disappears into the music.

The Stellar M1200 monoblock power amplifier combines the rich warmth and musicality of vacuum tubes with the jaw-dropping power and seemingly infinite headroom of a 1200 watt high-performance output stage. This extraordinary hybrid amplifier knows no limits. From the subtlest musical whisperings to the loudest crescendos an orchestra or rock band is capable of, Stellar M1200 never flinches. Regardless of your speaker’s power demands or limitations, enjoy the once unachievable uncompressed effortlessness afforded by this design. Pure musical bliss for any loudspeaker made, from the smallest to the biggest. Stellar.

Overview

The Stellar M1200 mono amplifiers solve a classic problem with nearly every power amplifier made: sonic compression. When the orchestra gets loud and complex, or the band really starts to rock it out, most power amplifiers get out of their comfort zone and we hear their stress and strain as compression. The M1200 was designed to play any music into any loudspeaker with zero compression. Rated at 600 Watts into 8Ω and a whopping 1200 Watts into 4Ω, the M1200 combines the best of two worlds: ultra-linear, high-current, ICE Edge Class D technology for the output stage; and a discrete, Class-A vacuum tube for the all-important input stage. The M1200’s rich, warm, and beautifully nuanced reproduction of music comes first from the zero feedback, class A vacuum tube input stage. Here nothing is lost in its hand-selected 12AU7 vacuum tube, fed from its own analog power supply.

The Vacuum Tube Input

The power amplifier is technology always present in stereo systems. Yet, despite the fact everyone uses them, few appreciate the power amp’s critical role in preserving music’s nuanced details because most amplifiers fail to preserve them. Overtones from plucked instruments, subtle cues defining placement, depth, soundstage width, and transient decays are often lost in the power amplifier. The M1200 loses nothing because of its vacuum tube input stage. In the M1200 a zero feedback class A vacuum tube input stage captures every whisper of music while preserving intact the most dynamic crescendos and quick rise time transients with zero loss. The listening experience with the M1200 is nothing short of a revelation. Where most amplifiers do their best to preserve dynamics, they fail to present them as if they were live. The M1200 eliminates the tendency of nearly every power amplifier to change its sonic character as the music gets louder.

Output Stage

The Stellar M1200 has a massive power supply and ultra-linear, high-wattage power amplification stage based on a modern Class D ICE module. Class D output stages provide near-perfect linearity, low distortion, and high efficiency. Modern Class D amplifiers, like the type used in Stellar, extend high frequencies to about 50kHz. Human hearing limitations are 20kHz, though most listeners rarely have hearing exceeding half that. Providing excellent frequency extremes, low distortion, high efficiency, high damping factor, and a generous and powerful output of 1200 watts into the most common loudspeaker loads of 4Ω, the M1200 is nothing short of breathtaking. The massively powerful nature of the M1200 works well with any loudspeaker—big or small—providing huge amounts of headroom and effortless sound quality for even the most demanding orchestral crescendos.

What owners and reviewers say

"There are few, if any, amplifiers that will grip the bass drivers as tenaciously as the M1200. Its transient speed can only be described as stunning. "
Absolute Sound Magazine
"Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience"
Stereophile Magazine · Read full review
I just upgraded from M700s to M1200s. Punch, authority, better separation of instruments, and loads of new detail. I got chills listening to some familiar symphony tracks! This is such a rewarding endeavor! I was very satisfied with my system before this latest upgrade and yet I now have renewed ...
PS Audio Forum
As it happened, however, my system was in flux, with gear whizzing in and out the door; so, I put the M1200s first on the WAMM main loudspeakers without harboring too great expectations. Boy, was I in for a surprise! The M1200 is not a good amplifier; it is a superb one
Jacob Heilbrunn, The Absolute Sound · Read full review
PS Audio Stellar M1200 proved itself to be one hell of an amplifier when it was delivering the sound of all the pianos I auditioned
Roger Hargreaves, What HiFi · Read full review

Trade up to it

You do not have to have bought from us before, and it does not have to be ours. Trade in almost any component from any brand and we credit its full original retail value against this one — up to a per-component cap that appears the moment you start a trade. See what yours is worth.

Hear it first

Every piece comes with a 30-day in-home trial. PMG Signature pieces get 60 days, with return shipping on us.

Not for sale

We build these in Boulder, Colorado, and we are glad to show our work. Paul answers questions on video most weekdays, and the factory is open to visitors.

Try it at home $6,998.00
Take it home

Overview

The Stellar M1200 mono amplifiers solve a classic problem with nearly every power amplifier made: sonic compression. When the orchestra gets loud and complex, or the band really starts to rock it out, most power amplifiers get out of their comfort zone and we hear their stress and strain as compression. The M1200 was designed to play any music into any loudspeaker with zero compression. Rated at 600 Watts into 8Ω and a whopping 1200 Watts into 4Ω, the M1200 combines the best of two worlds: ultra-linear, high-current, ICE Edge Class D technology for the output stage; and a discrete, Class-A vacuum tube for the all-important input stage. The M1200’s rich, warm, and beautifully nuanced reproduction of music comes first from the zero feedback, class A vacuum tube input stage. Here nothing is lost in its hand-selected 12AU7 vacuum tube, fed from its own analog power supply.

The Vacuum Tube Input

The power amplifier is technology always present in stereo systems. Yet, despite the fact everyone uses them, few appreciate the power amp’s critical role in preserving music’s nuanced details because most amplifiers fail to preserve them. Overtones from plucked instruments, subtle cues defining placement, depth, soundstage width, and transient decays are often lost in the power amplifier. The M1200 loses nothing because of its vacuum tube input stage. In the M1200 a zero feedback class A vacuum tube input stage captures every whisper of music while preserving intact the most dynamic crescendos and quick rise time transients with zero loss. The listening experience with the M1200 is nothing short of a revelation. Where most amplifiers do their best to preserve dynamics, they fail to present them as if they were live. The M1200 eliminates the tendency of nearly every power amplifier to change its sonic character as the music gets louder.

Output Stage

The Stellar M1200 has a massive power supply and ultra-linear, high-wattage power amplification stage based on a modern Class D ICE module. Class D output stages provide near-perfect linearity, low distortion, and high efficiency. Modern Class D amplifiers, like the type used in Stellar, extend high frequencies to about 50kHz. Human hearing limitations are 20kHz, though most listeners rarely have hearing exceeding half that. Providing excellent frequency extremes, low distortion, high efficiency, high damping factor, and a generous and powerful output of 1200 watts into the most common loudspeaker loads of 4Ω, the M1200 is nothing short of breathtaking. The massively powerful nature of the M1200 works well with any loudspeaker—big or small—providing huge amounts of headroom and effortless sound quality for even the most demanding orchestral crescendos.

Recommended products

Specifications

Stellar M1200 Mono Amplifier

Unit Weight 27 lbs [12.2 kg] (each)
Unit Dimensions 17”W x 3.75”H x 12”D (13"D w/connectors)
17”W x 7.5”H x 12”D (Stacked)
Shipping Weight 29 lbs [13.15 kg] (each)
Shipping Dimensions 22”W x 8”H x 17”D (each)
Color Options Black
Silver
Vacuum tube type 12AU7
Voltage Options
(Factory set only)
Japan 100V
North America 120V
Europe/Asia/Australia/New Zealand 230V
Mains Power Inputs IEC C14
Idle Power Consumption 27W
Power Factor >0.9 @ rated power 4Ω
Accessories Included US (NEMA 5-15P) (all versions)
Schuko (CEE7/7) (230V version)
UK (BS 1363) (230V version)
Audio Inputs RCA (Unbalanced)
XLR (Balanced)
Speaker Outputs Copper base nickel plated binding posts (2 pair)
DC Trigger Input 3.5mm 5-15VDC
Warranty 3 years parts and labor

Signal

Gain 30.5dB +/-0.5dB
Sensitivity for rated output power 2.08V
Signal to Noise 1kHz@1200 Watts > 112dB
Input impedance Unbalanced 50KΩ
Balanced 100KΩ
Output Impedance 50Hz, 2.8VRMS <0.007Ω
Damping factor 50Hz. 2.8VRMS
8Ω >1100
4Ω >550
Frequency Response 2.8VRMS into 4Ω
10Hz – 20KHz +/- 0.5dB
10Hz – 45KHz +0.1/-3.0dB

THD & IM

1KHz, 1W/4Ω < 0.005%
10-20KHz, 1W/4Ω < 0.01%
1KHz, 150W/4Ω < 0.02%

Output Power

120vac mains, 1kHz, 1% THD
8Ω 600W minimum
4Ω 1200W minimum
2Ω Stable for musical transients