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Dan D'Agostino Progression S350 Stereo Amplifier, Black - As Traded
Condition: Used. Excellent, presents as new with no obvious marks or scratches
Includes: All Original Packaging, Power Cable
Does not include amp isolation platform pictured
SN: PS0339P
Includes 3 month (90 day) warranty
Overview
An endgame stereo power amplifier, the S350 sounds as good as it looks. With a beautiful VU meter gracing the chassis' front that could rival the finest Swiss watch face, that's saying a lot!
This particular unit is in as-new condition and includes all original packaging.
Leveraging innovative Super Rail circuitry, the Progression S350 Stereo Amplifier exploits this unique technology delivering remarkable control and fidelity to any connected loudspeaker. Borrowing the idea of a turbo in a car engine, the Super Rail employs higher voltage rails in the sections prior to the output stage. This voltage "boost" allows the musical signal to exploit the full capability of the output voltage rails. Extending the musical signal swing closer to the output rails maximizes the performance of the output circuitry design itself. The result is improved dynamics, lower distortion, and a fierce grip of the speaker.
A graceful anodized Aluminium chassis houses a 2,000 VA power supply transformer coupled to nearly 100,000 microfarads of power supply storage capacitance. Paired to this foundation is a fully complementary driver stage, and output circuitry outfitted with 48 power transistors - 24 each for the left and right channels generating an imposing output. Initially used in the Relentless Mono, the output power device provides the foundation for an upgraded output stage. This transistor extends high frequency response, increases power handling 50%, and features tighter tolerance gain matching between complementary NPN/PNP pairs.
Specification
Signal-to-Noise Ratio 105 dB, unweighted / 75 dB A weighted
Finish Silver or Black with Custom Finishes Available Upon Request
Total Harmonic Distortion 350W @ 8Ω .015% @ 1 kHz
Input Impedance 100 KΩ
Output Impedance 0.1Ω
Power 350 watts @ 8Ω 700 watts @ 4Ω 1,400 watts @ 2Ω
Distortion Inputs 2 balanced XLR
Dimensions 17.875 x 9.0 x 23.0 in / 45.4 x 22.9 x 58.4 cm
Weight 115lb / 52.2 kg
AUDIO CONNECTION QUALITY GUARANTEE
✔️Comprehensive three month warranty on Trade In's*
✔️Passed our checks for functionality
✔️A full inspection noting for any defects
✔️A full completeness check for all included parts and accessories
Generating expert take…
Dan D'Agostino Master Audio Systems emerged in 2011 from the vision of its founder, Dan D’Agostino, a legendary audio engineer whose career began with founding Krell Industries in 1981. After leading Krell as owner, CEO, and chief designer—shaping the modern high-performance amplifier—he was ousted in 2009 amid a dispute with investors. Relocating to Cave Creek, Arizona, he launched this boutique brand to pursue uncompromised designs, drawing on decades of innovation in power amplification and music reproduction.
The company focuses exclusively on elite amplification categories, producing three core families: Progression, Momentum, and Relámpago series. These encompass monoblock and stereo power amplifiers, preamplifiers, integrated amplifiers, and specialized components like phono stages supporting multiple MM and MC cartridges, plus DAC and streaming options. Handcrafted by dedicated artisans, the products emphasize mechanical grounding, thermal management, and signal purity, with no foray into speakers, turntables, headphones, or cables.
Positioned at the pinnacle of the high-end audio market, Dan D'Agostino commands reverence among discerning audiophiles for delivering reference-level transparency, dynamics, and warmth. Its limited-production gear represents the ultimate in boutique luxury, where engineering precision meets musical artistry, justifying six-figure price tags for systems that redefine playback fidelity.
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