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.