The Grace m9XX has a direct-coupled design with no capacitors in the signal path and the output amplifier is DC servo-controlled, ensuring zero phase shift for the ultimate in clarity and resolution. High-quality resistors in the circuit path help the m9XX deliver a low-noise, low-distortion signal, along with dynamic accuracy and excellent channel matching to the headphones. The amplifier section is built around the TI THS6012 current feedback chipset, but has been modified with a proprietary circuit topology to zero output impedance for a maximized damping factor, even with sensitive IEMs. This allows the m9XX to deliver all of the ultra-high resolution and clarity of a current feedback amp with all of the control and dynamics of a zero-output impedance headphone amplifier. The compact m9XX even includes new crossfeed circuitry that sonically distributes the stereo image across your headphones’ soundstage, helping to reduce listening fatigue over time. Toggle this on or off from the device menu.