PS Audio · amplification · House of Stereo
A dedicated foundation for stereo listening.
The Stellar S300 combines a Class A MOSFET input stage with Class D output stages in a slim stereo enclosure. Balanced and single-ended inputs make it a practical power amplifier for a separates system.
One stereo amplifier with left and right channels.
Stellar S300 Stereo Power Amplifier
Analog at the input, efficient at the output
PS Audio’s Analog Cell input stage uses MOSFET devices operating in Class A. It hands the signal to Class D amplification for the loudspeakers. This division of duties keeps the chassis compact while delivering the rated power of a dedicated stereo amplifier.
Stellar S300 Stereo Power Amplifier
A straightforward step into separates
The dual-mono arrangement gives each channel its own supply. Connect a preamplifier or a DAC with an appropriate variable analog output, then connect the speaker cables. A fixed-output source cannot safely replace volume control. The S300’s 3-inch chassis height can fit neatly into a rack, but ventilation and connector clearance still matter.
Make it work in your system
Thoughtful setup makes the difference.
Begin with volume control
Connect a preamplifier or a correctly configured variable-output source. Start at a low level and use the input type suited to your system.
Give the amplifier room
Leave ventilation and cable clearance. Check speaker impedance and mains requirements in the manual before installation.
Match power to the room
Speaker sensitivity, listening distance, and playback level affect useful headroom. Ask House of Stereo to help compare an amplifier with your speakers.
The details that matter
Specifications
| Output per channel | 140 W into 8 Ω / 300 W into 4 Ω |
|---|---|
| Rating conditions | Both channels driven, 120 V AC, 1 kHz, 1% THD |
| Architecture | Class A MOSFET input / Class D output; dual mono |
| Inputs | XLR and RCA |
| Gain | 30.5 dB |
| Dimensions | 17 W × 3 H × 12 D in; 13 D in including connectors |
| Weight | 13 lb / 5.9 kg |
| Idle consumption | 13 W |
Ratings are manufacturer specifications. Check the linked manual for complete operating conditions, regional requirements, and installation instructions.
Before you choose
Common questions
Do I need a preamplifier?
Yes, you need a suitable source-selection and volume-control stage. This is a power amplifier, not an integrated amplifier.
Are speakers included?
No. This listing covers the amplifier package described above. Speakers and source components are separate.
Keep researching.
Read the manufacturer’s owner’s guide (PDF)
