Mark Levinson № 631 Monaural Power Amplifier

The flagship of the 600 Series amplifiers, the № 631, is a fully differential, fully discrete, monaural amplifier powerhouse capable of driving virtually any loudspeaker with effortless dynamics and incredible sonic detail. Designed and built with Pure Path circuit design philosophy, the № 631 provides a deep, expansive soundstage with extremely accurate image placement.

Anchored internally by a centrally located and structurally isolated custom designed ultra-low-noise toroidal transformer, the № 631 effortlessly delivers massive power to the loudspeaker unleashing the full potential of music like never before. Because the amplifier circuitry was designed to have such inherently high performance, it requires very little feedback to achieve impeccably low distortion and enormously wide bandwidth. By employing unusually high bias current, the amplifier enables superb linearity with wide bandwidth creating an amplifier that is nearly immune to the effects of parasitic capacitances, able to change voltage with unreserved agility. These design principles are the hallmarks of Mark Levinson amplification: effortlessness, openness, and unadulterated smoothness throughout the entire frequency range, regardless of load or listening level.

The floorstanding chassis of the № 631 utilizes a modular architecture to isolate critical low-level analog circuitry from the power supply with critical components isolated on rubber mounts. The № 631 utilizes Mark Levinson’s latest vibration-damping, mechanically isolated foot design to provide the most stable and decoupled connection from the surface upon which it sits.

The Tectonic exterior design features an aluminum and steel chassis anodized in black with a silver plinth. A glass center panel cascades down the front accented with red lighting on either side forming the focal point of the front panel. The top panel includes the glass Core element with red accent lighting surrounded by generous ventilation that combines with custom heat sink side panels for maximum thermal efficiency.