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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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
Its transient speed can only be described as stunning.
Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience
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 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 |
Compare
How it compares
| M800 | M400 | S400 | S200 | M1200This one | M700 | S300 | Strata | |
|---|---|---|---|---|---|---|---|---|
| Price | $29,998 / pair | $17,998 / pair | $9,999 | $7,999 | $6,998 / pair | $3,498 / pair | $1,999 | $3,499 |
| Speakers & room | Large rooms, any speaker | Large floorstanders, medium to large rooms | Floorstanders, typical rooms | Bookshelf or efficient speakers, smaller rooms | Large or hard-to-drive speakers | Floorstanders, typical rooms | Bookshelf speakers, smaller rooms | Add your speakers, bookshelf or floorstanding |
| Power | 400 W into 8Ω · 800 W into 4Ω | 200 W into 8Ω · 400 W into 4Ω | 200 W into 8Ω · 400 W into 4Ω, per channel | 100 W into 8Ω · 200 W into 4Ω, per channel | 600 W into 8Ω · 1,200 W into 4Ω | 350 W into 8Ω · 700 W into 4Ω | 140 W into 8Ω · 300 W into 4Ω, per channel | — |
| Design | Mono pair, one per speaker | Mono pair, one per speaker | Stereo, one box | Stereo, one box | Mono pair, one per speaker | Mono pair, one per speaker | Stereo, one box | Integrated, one box |
| What sets it apart | 50 W of Class A bias: 99% of typical listening in pure Class A | 30 W of Class A bias | 10 W of Class A bias per channel | 10 W of Class A bias per channel | Vacuum tube input stage | Stable down to 2Ω | Dual mono, a separate power supply for each channel | Moving 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.
- Tell us what you have. Press Start your trade-in and list your gear. Nearly any working hi-fi component counts, from any brand.
- Pay the adjusted price. At checkout you are charged only the price after your credit. Our sales team reviews every trade within 48 hours.
- Send yours back. We email a return label number. You have 30 days to ship your trade.
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. "
"Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience"
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...
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
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
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 specialistOutside 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 dealerHear 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.
M1200 Amplifier Pair
Details
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
Amplifier
M1200 Amplifier Pair
The Stellar M1200 mono amplifiers are a high power super linear amplifier with a vacuum tube input providing uncompressed performance.








At home
Where it disappears into the music.
Overview
The Vacuum Tube Input
Output Stage
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. "
"Designer Myers has certainly done his job: creating a small, lightweight, cost-effective, powerful miracle performer that's sure to find a vast audience"
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 ...
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
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
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.
Overview
The Vacuum Tube Input
Output Stage
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 |