About Dan D'Agostino

Dan D'Agostino is a renowned audio engineer and founder of the eponymous audio equipment brand. With over four decades of experience in the industry, D'Agostino has become a legendary figure in the world of high-end audio, and his brand is synonymous with exceptional quality, craftsmanship, and performance.

D'Agostino's audio equipment is highly regarded by audiophiles and music enthusiasts for its uncompromising sound quality and innovative design. The brand's flagship product, the Momentum stereo amplifier, is a testament to this reputation, boasting 300 watts of pure Class A power, a balanced input stage, and a range of advanced features such as a built-in phono stage and selectable impedance settings.


One of the hallmarks of the D'Agostino brand is the attention to detail that goes into every product. Each piece of audio equipment is hand-built in the company's factory in Arizona, using the finest components and materials available. This results in a level of quality and craftsmanship that is unmatched in the industry.

Another key aspect of the D'Agostino brand is the company's commitment to innovation. D'Agostino has always been at the forefront of audio technology, and his brand is constantly pushing the boundaries of what is possible in the world of high-end audio. From the use of new materials and manufacturing techniques to the development of advanced digital signal processing algorithms, D'Agostino is always looking for ways to improve the performance of his equipment and deliver the best possible listening experience to his customers.


The Relentless Mono Amplifier is the result of an all-out pursuit to design an amplifier without limits. Incorporating elements of the Momentum series, breakthrough circuit topologies, and a new power transistor, the Relentless Mono Amplifier maintains its harmonic integrity, dynamic structure, and dimensional soundstage from its first watt to the more than 11,000 watts it is capable of delivering into a 1ohm load. With its practically unlimited power, the Relentless Mono Amplifier will drive any loudspeaker to its fullest potential, from a mere whisper to thundering dynamics.


Combining engrossing sound quality, a flexible platform, and striking aesthetics, the Relentless Preamplifier is the ultimate centerpiece for a truly brilliant audio system.

Created for uncompromising listeners and needing three chassis to execute, the Relentless Preamplifier elevates every aspect of preamplifier design. Individual audio chassis and power sections ensure complete isolation from noise. Audio and power signals are carried through interlocking feet shortening signal feeds to the absolute minimum.