Dan D'Agostino Momentum M400 MxV Monaural Amplifier (sold as a pair)

One amp per speaker, and enough headroom that your speakers will never be the limiting factor again.

"To put it simply, the M400 is phenomenal..." — Ken Kessler, Hi-Fi News

"This is an amp with a six-pack." — Jacob Heilbrunn, The Absolute Sound

There's a certain kind of confidence that comes from an amplifier that's never straining. The M400 MxV is built around that idea — a dedicated monoblock for each speaker, engineered to deliver huge, effortless power no matter what you throw at it. Play quietly and it's silky and refined; push it during a big dynamic swing and it just... keeps going, without ever sounding stressed or congested.

That composure comes from a top-to-bottom rework of the amp's internals. A beefed-up transformer and a nearly 100,000 μF capacitor bank give it enormous reserves to draw on, while an increase in Class A bias — the setting most responsible for that rich, textured, "analog" sound — pushes the amp further into its sweetest-sounding operating range without overheating, thanks to new copper heatsinks purpose-built to handle it. The output stage borrows components straight from D'Agostino's flagship Relentless amplifiers, so you're getting trickle-down engineering from the company's most extreme design, in a chassis sized for the real world.

And if you already own an earlier Momentum monoblock, you don't have to start over — D'Agostino can upgrade your existing amp to full MxV performance in the same chassis.

Speakers that are hard to drive, big rooms, large dynamic swings — this is the amp you buy when you never want power to be the reason a system falls short.