Jason Victor Serinus

Located by itself in the Orange County Hilton’s Dana Point room, half-obscured beyond a display of several luxury cars, Joseph Cali System Design's Gryphon Audio Design System put on a show all its own. That it sounded as good as it did in a hotel space formerly occupied by a hair salon—hair salons are hardly prized for their acoustics—was a near miracle. Everything from recording studio Gobos and ASC Tube Traps to Vicoustic Diffusers and black draping (covering floor-to-ceiling glass windows) was employed to deliver sound that, if at all bettered at T.H.E. Show, will have to be sensational and then some.

That's another way of saying that Joseph Cali (left in photo) and Rune Skov (right), had every reason to be proud of their accomplishment.

The Momentum M400 MxV Mono amplifier ($79,500/pair) is the latest iteration of Dan D'Agostino Master Audio Systems' debut amplifier of 2011, the Momentum Mono amplifier. Weighing 95lb, it is smaller and lighter than its entry-level sibling, the more powerful, 125lb Progression M550 Mono amplifier ($47,500/pair), and is veritably dwarfed by some other monoblocks, including the flagship D'Agostino Relentless Epic 1600 (570lb) and the Karan Acoustics POWERa mono (231lb), which I reviewed in May 2023. But if the M400 MxV's rock-solid look and feel and its exquisite aesthetics—a sleek amalgam of silver and copper fronted by a power meter that glows green and radiates Rolex quality—are any indication, a helluva lot is going on beneath its showy exterior.

What a show. During its four days in the MOC event center, the first two reserved for industry and press, Munich High End attracted 22,137 visitors from approximately 100 different countries. With 550 exhibitors and more than 1000 brands from 54 nations, they had plenty to hear and see.

In the extremely large, all-sonic-bets-are-off, glass-enclosed Atrium display mounted by Mansour Mamaghani's Audio Reference Munich, Dan D'Agostino, and his indispensable sidekick (aka company President) Bill McKiegan, joined forces with Wilson, dCS, and Perlisten to blow people's minds. When the new Relentless Epic and Relentless Epic 800 mono amplifiers got fired up, it was a case of which dazzled you first, the sound or the sheer enormity and shine of the display.