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Offered is „Progression M550“ by Dan D Agostino as second-hand device from the category „Transistor-Poweramp“ on audio-markt.de - the online market place for high-end. The advert with the number 6318029027 ends on 27.10.2026 at 06:38 o'clock.
At €32,950, this single Progression M550 monoblock is ambitious, sitting well above the €27,016 75th percentile and the €20,296 median for used units in your database, though it remains below the current new price of roughly €37,000–€39,000. For a pair, the asking would be €65,900, which is still below new, but as a single unit, the price exceeds the typical used range significantly unless it includes rare extras.
The M550 is a revered 550W Class A mono delivering massive current with 0.015% distortion and a 1 Hz–80 kHz response, prized for its control and transparency. This early-build unit offers genuine upside if it’s original-owner condition with clean history, but at this price, verify the build date, ensure no missing accessories, and confirm it’s not a single where a pair is expected. If it’s truly a rare single in pristine shape, it’s a solid opportunity; otherwise, the price is tough to justify against the market.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Dan D’Agostino Master Audio Systems is a U.S. high-end audio brand founded in 2011 and based in Cave Creek, Arizona. It was created by Dan D’Agostino, one of the most influential names in modern American amplification and the longtime founder of Krell. The brand grew out of his decades of work in high-performance audio, with a clear emphasis on combining serious engineering, distinctive industrial design, and a deeply music-first philosophy.
The company is best known for amplification: flagship integrated amplifiers, power amplifiers, and preamplifiers are its core products, alongside phono stages and DACs in some lines. Its components are built for serious two-channel systems rather than broad consumer audio, and the lineup is organized around a few highly refined families rather than a wide mass-market catalog. Dan D’Agostino does not focus on speakers, turntables, headphones, or cables as its main identity.
In the market, Dan D’Agostino sits firmly in the ultra-high-end, boutique category. It is a statement brand associated with audiophile reference systems, luxury cabinetry, and very high performance expectations. Buyers tend to see it as a prestige manufacturer with strong engineering credibility and a distinctive visual signature, aimed at enthusiasts who want no-compromise amplification at the top end of the market.
See all Dan D'Agostino listings on RADAR.
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