The Momentum M400 Mono Amplifier delivers magnificently on the initial design goals of substantial power and incomparable refinement from a compact chassis. The Momentum M400 Mono Amplifier provides loudspeaker control at any volume level accompanied by unparalleled finesse to deliver a thrilling musical experience. Worldwide, reviewers, critics, and end users praise the performance and elegant aesthetic design. Global recognition includes more than a dozen “best of” awards and the highest ever review scores for sound and measured performance.


The Momentum S250 stereo amplifier conveys the extraordinary sound quality of the Momentum M400 Mono Amplifier in the same space as a single Momentum M400 Mono Amplifier. Sharing much of the same topology and chassis from its bigger brother, the Momentum S250 Stereo Amplifier is the ideal choice when the Momentum M400 Mono Amplifiers are not the right choice for a system. An optimized stereo input stage, designed explicitly for the Momentumn S250 Stereo Amplifier, maximizes the performance of the Momentum amplifier output circuitry. If circumstances change, the Momentum S250 Stereo Amplifier may be upgraded to the Momentum M400 Mono Amplifier.


Only the Momentum HD Preamplifier produces the dynamics and sound quality necessary to maximize the performance possible from the Momentum M400 Mono Amplifiers and Momentum S250 Stereo Amplifiers. The kernel of a new input stage idea had been hatched during the design of the Relentless Mono Amplifier. First thought of as a potential input stage for the future Relentless Preamplifier, the Momentum Preamplifier was the perfect test bed for this engineering experiment. The results were shocking and the Momentum HD was born.


Combining the technology from the Momentum Preamplifier and the Momentum Stereo Amplifier, the Momentum Integrated delivers the full Momentum experience in a sophisticated package. The elegantly crafted base houses the power supply components isolating any potential stray electrical or magnetic fields from the comprising the audio signal path. Solid Copper joins with machined, anodized Aluminum to create a remarkably efficient heat sink capable of wicking away the heat that is the enemy of all power amplifiers.


The Momentum Phonostage brings the impeccable craftsmanship and matchless audio quality of the Momentum ethos to the demanding field of vinyl record playback. Locked inside the grooves of every vinyl record is the most realistic, natural, moving sound one can experience. The trick is extracting this delicate information off the record and into your speakers. The result of tackling this pursuit at the highest level is the Momentum Phonostage. No less than three individual chassis are employed to achieve the magnificent results.


No name is more closely associated with high-end audio amplifiers than that of Dan D’Agostino. During his career of more than 35 years, D’Agostino pioneered countless advances in the design of amplifiers, preamplifiers, CD players, and surround-sound processors. He is known as the audio industry’s most passionate promoter of high-quality, high-powered amplification. Makers of the world’s finest loudspeakers rely on D’Agostino-designed amplifiers for their most important demonstrations.

Dan D’Agostino was founder and chief engineer of Krell Industries through 2009. Since the inception of DDMAS in 2011, energized with a new organization and new state-of-the-art designs, the products that bear his name not only achieve new levels of sound quality, they also look like nothing else in the industry. The new designs combine an elegant aesthetic flair coupled to inventive circuit topologies and innovative materials.

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.

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