Progression S350

About the Progression S350

The Dan D'Agostino Progression S350 Stereo Amplifier is a high‑power, solid‑state stereo power amplifier that adds a potent stereo option to the Progression family. It leverages Dan D'Agostino's Super Rail circuitry, trickled down from the Relentless M550 monoblock, to improve dynamics, lower distortion, and maintain exceptionally tight control over connected loudspeakers. Housed in a graceful, anodized aluminum chassis with massive milled heatsinks, it incorporates a 2,000 VA power transformer and nearly 100,000 µF of power-supply capacitance feeding a fully complementary driver stage and an output section with 48 power transistors (24 per channel), enabling 350 watts per channel into 8 Ω, 700 watts per channel into 4 Ω, and 1,400 watts per channel into 2 Ω. Frequency response runs 1 Hz to 80 kHz (-1 dB), signal-to-noise ratio reaches up to 105 dB (unweighted), and THD is around 0.015% at 1 kHz, 350 W into 8 Ω. Connectivity is via stereo XLR inputs and dual pairs of speaker binding posts. It measures approximately 17.875" x 9.0" x 23.0" (W x H x D), weighs about 115 lb, and is available in silver or black finishes. Optional Progression amplifier floor stands are offered in matching silver or black.