PS Audio Stellar S300 Stereo Power 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 PS Audio Stellar S300 stereo amplifier is a terrific performer and an affordable option for those wishing to upgrade from a receiver or integrated amplifier to separates. It's not often that an audio product exhibits such high-end performance at such an affordable price, but the S300 hits it out of the park on both counts and has high-end build quality to boot. It's the perfect amp for someone looking to enter the world of separates for two-channel playback in a small to medium-sized room Bob Barrett, Future Audiophile


Sale price$3,495.00
Colour: Black

Key features

DUAL MONO WITH SEPARATE POWER SUPPLIES

300 WATTS PER CHANNEL 4Ω

VERY LITTLE HEAT PRODUCTION

Noise 1kHz@300 Watts < -100dB

Finishes Black & Silver

PS Audio Stellar S300 Stereo Power Amplifier

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PS Audio Stellar S300 Stereo Power Amplifier

The Stellar S300 Stereo Power Amplifier is designed for listeners who want their loudspeakers to deliver more than simply sound—it is built to reveal the full scale, depth, energy, and emotion hidden within their music collection. Combining a high-current Class D output stage with PS Audio’s discrete Class A MOSFET-based Analog Cell, the S300 brings together power, precision, warmth, and musicality in one remarkably compact amplifier.

With 140 watts per channel into 8Ω and 300 watts per channel into 4Ω, the S300 has the authority to drive a wide range of demanding loudspeakers with confidence. Its dual-mono architecture, separate power supplies for each channel, and extremely high damping factor provide exceptional control over speaker drivers, producing tight bass, a stable soundstage, and effortless dynamics.

What makes the S300 particularly compelling is its ability to combine the efficiency and control of modern Class D amplification with the rich, engaging character associated with Class A circuitry. The result is a sound that is powerful yet refined, detailed yet natural, and controlled without becoming sterile.

Whether you are upgrading an existing hi-fi system or building a serious two-channel listening setup, the Stellar S300 offers an impressive level of performance, connectivity, and engineering in a full-sized stereo power amplifier.

PS Audio Stellar S300 Stereo Power Amplifier

Powerful 140W / 300W Stereo Output

The Stellar S300 delivers 140 watts per channel into 8Ω and 300 watts per channel into 4Ω, giving it substantial power reserves for demanding loudspeakers. It is also 2Ω stable for musical transients, allowing the amplifier to handle difficult speaker loads with confidence.

PS Audio Stellar S300 Stereo Power Amplifier

Class A Analog Cell for Rich, Detailed Sound

At the heart of the S300 is PS Audio's proprietary Analog Cell, a fully differential, zero-feedback, discrete Class A MOSFET input stage designed to preserve delicate musical information. It is specifically engineered to retain micro-dynamics, texture, and subtle layers that can easily disappear in conventional amplifier designs.

PS Audio Stellar S300 Stereo Power Amplifier

Dual-Mono Design with Separate Power Supplies

The S300 uses a true dual-mono architecture, meaning each stereo channel has its own independent power supply and amplification stage. This minimizes interaction between the left and right channels and gives each side of the amplifier the power it needs to perform independently.

PS Audio Stellar S300 Stereo Power Amplifier

High-Current Class D Output Stage, Exceptional Speaker

The S300 combines its Class A input stage with a highly linear, high-current Class D output stage. This architecture provides high efficiency, low distortion, low output impedance, and a very high damping factor, allowing the amplifier to maintain strong control over your loudspeaker drivers.

PS Audio Stellar S300 Stereo Power Amplifier

Balanced XLR and RCA Inputs for Flexible System

The S300 provides both true balanced XLR and single-ended RCA inputs, making it easy to integrate into a wide variety of high-end audio systems. Whether you use a balanced preamplifier, DAC, streamer, or a traditional RCA-based setup, the amplifier can adapt to your existing equipment.

PS Audio Stellar S300 Stereo Power Amplifier

High Performance with Low Heat and Compact Design

Despite its substantial power output, the Stellar S300 is highly efficient and produces very little heat, thanks largely to its Class D output architecture. This makes it easier to incorporate into a modern audio system without the excessive heat associated with many traditional high-powered amplifiers.

PS Audio Stellar S300 Stereo Power Amplifier
The PS Audio Stellar S300 stereo amplifier is a terrific performer and an affordable option for those wishing to upgrade from a receiver or integrated amplifier to separates. It's not often that an audio product exhibits such high-end performance at such an affordable price, but the S300 hits it out of the park on both counts and has high-end build quality to boot. It's the perfect amp for someone looking to enter the world of separates for two-channel playback in a small to medium-sized room

Bob Barrett, Future Audiophile

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