S300 Amplifier


S300 Amplifier
S300 Amplifier
From the deepest bass to the warmest, sweetest highs, the Stellar S300 makes any loudspeaker sing and is our most affordable stereo power amplifier ever.
Breathe new life into your loudspeakers with the Stellar S300, a full-sized, affordable stereo power amplifier that honors the music and controls your loudspeakers better than you ever imagined possible. The S300 combines the slam, linearity, and toe-tapping 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 ground breaking. Liberate a wealth of untapped energy trapped in your media library. Plumb music’s subterranean depths and finally hear the bass your speakers were capable of. Revel in rich layers of fine, full detail. Marvel at the deep, extraordinary, wall-to-wall soundstage. Effortless. Lush. Stellar.
Regular price
$1,999.00 USD
Regular price
Sale price
$1,999.00 USD
Unit price
per
Shipping calculated at checkout.
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Eligible for up to $600 of credit
Eligible for up to $600 of credit
With PS Audio's trade-in program we can buy back your treasured old gear, regardless of its brand or type, for its full retail value. As if your trade-in were new.
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Design
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Application
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Features
Specifications - S300 Amplifier
Stellar S300 Stereo Amplifier |
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Unit Weight | 13 lbs [5.9 kg] |
Unit Dimensions | 17”W x 3”H x 12”D (13"D w/connectors) |
Shipping Weight | 16.5 lbs [7.5 kg] |
Shipping Dimensions | 22”W x 8”H x 17”D |
Color Options | Black Silver |
Voltage Options (Factory set only) |
Japan 100V North America 120V Europe/Asia/Australia/New Zealand 230V |
Mains Power Inputs | IEC C14 |
Idle Power Consumption | 13W |
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 per channel) |
DC Trigger Input | 3.5mm 5-15VDC |
Warranty | 3 years parts and labor |
Signal |
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Gain | 30.5dB +/-0.5dB |
Sensitivity for rated output power | 1.01V |
Noise | 1kHz@300 Watts < -100dB |
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 – 50KHz +0.1/-3.0dB |
THD&IM |
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1KHz, 1W/4Ω | <0.02% |
10-20KHz, 1W/4Ω | <0.02% |
10-50KHz, 1W/4Ω | < 0.05% (90kHz BW) |
1KHz, 37.5W/4Ω | < 0.01% |
Output Power |
Both channels driven 120vac mains, 1kHz, 1% THD |
8Ω | 140W minimum |
4Ω | 300W minimum |
2Ω | Stable for musical transients |
Reviews

The result of all these strengths gives the S300 a beautiful voice which mates well
with the variety of upstream gear we had on hand for testing. It holds its own against
components that exceed its price tag. This PS Audio component deserves a spot on a short
list of bargain amps that perform beyond what one should expect for the money.
After a few weeks with the S300 in my reference system, I must admit I am smitten with it.
I applaud PS Audio’s new approach to circuit design bringing together the benefits of both
Class A and Class D technology.
Tone Audio
Rob Johnson

They sounded so good together I couldn't bring myself to try too many other speakers. The sound was rich with resolution to die for.
Magnepan speakers aren't known for their deep bass punch, but here with the two Stellars the .7 speakers' low bass was kicking with "The Legendary Skatalites in Dub" reggae album with really low, feel-it-through-your-toes bass. Austin Wintory's orchestral score for "The Banner Saga" sounded downright huge, and the low bass drums definition was truly stellar!
C/NET
Steve Guttenberg

The Stellar DAC/Pre-Amp/Power Amplifier filled my listening room with 3D sound, and they matched well with each of my speakers; the floor standing Audio Physic Tempos, the stand mounted Platinum Audio ST 1’s and the low-to-the ground Mission 727s. I was surprised how different they made each sound and I spent a great deal of time swapping out my Parasound Halo 2.1 integrated amplifier, Bel Canto s300 integrated amplifier to make sure I wasn’t fooling myself. And, yes, I was hearing something new and more evocative from my usual suspects.
HiFi Pig
David Blumenstein

Folks, this is the future. We have heard vast improvements of Class D amplifiers during the last 10 years, and we are at or near the point where the technology is largely irrelevant to the final sound. The sound of audio components is more dependent on the implementation than on the underlying technology. The PS Audio Stellar S300 gets so close to perfection that the low purchase price is an out-of-this-world value. The PS Audio Stellar S300 adds nothing objectionable while delivering wonderful musical performances.
10 Audio
Jerry Seigel