Starting with the Momentum Mono amplifier, the D’Agostino product line now extends upwards to the awe inspiring Relentless Mono amplifier and outwards to the new Progression Integrated amplifier. The Relentless Mono Amplifier is an all-out assault on the amplifier category. Capable of driving any speaker to its fullest capability, the extraordinary power output of the Relentless Mono is only matched by its sublime low volume sound quality. The Progression Integrated amplifier connects the high-performance core of D’Agostino products to the exciting world of streaming audio with Tidal, Quobuz, and Spotify services as standard offerings. We are proud to say that all D'Agostino components are hand-built in the USA, by our team of craftsmen and technicians, in our Arizona facility. As impressive as these designs may sound on paper, the only way you can truly appreciate their warmth, detail and unmatched beauty is to experience them at your nearest Dan D’Agostino Master Audio Systems dealer.