At its core, the new m902 is a high-quality reference headphone amp. The m902 is built upon the remarkable success of the model 901 from Grace; but with addition of many new and essential features designed to make it invaluable for any critical audio application! Audio pros will be floored by the m902’s latest generation, high-performance 24-bit/192kHz DAC! It includes Grace’s unique s-Lock dual stage PLL for extremely low jitter and rock-solid digital performance. A full compliment of digital and analog inputs are available (including USB). New to the m902 is the ability to simulate the acoustics of a loudspeaker listening environment which significantly improves imaging while reducing listening fatigue when using headphones! Additionally, the m902 cleverly adds stereo analog line outputs for connection to studio monitors, allowing it to also function as an elegantly simple high-fidelity monitor controller!