The World’s Lowest Distortion Amplfiier: The THX Achromatic Audio Amplifier (THX AIAA) ensures the ultimate no-compromise headphone audio experience by delivering the world's highest fidelity audio with infinitesimally low levels of noise, distortion, and power consumption.AKM 4493 DAC Detailed Sound: AKM's new flagship 32-bit stereo premium DAC. It supports PCM inputs up to 768kHz and a Direct Stream Digital (DSD) input of 2.8/5.6/112 (maximum) MHz, the industry's highest level. An internal circuit employs a newly developed 32-bit digital filter for the ultimate in sound quality and musicality.DIRAC SENSAROUND Expand your headspace. Music is usually mixed with loudspeakers in mind, not headphones. . No fuzzy sound, fake spatial effects, or poorly placed sound objects. Just transparent and natural sound as in a well-designed cinema, studio, or any other professionally engineered space.VERSATILE INPUTS This amplifier features a USB and a 3.5mm optical input, as well as an analog 3.5mm stereo input for devices without digital outputs. TAILOR YOUR SOUND: PEQ and Shelf EQU - Use the powerful digital tools to tailor the sound to your personal preference.DYNAMIC RANGE CONTROL: Use the DRC functionality to set the shelving filters. The DRC starts with low-pass and high-pass filters to split the low and high frequencies (24dB/oct @ 140Hz), followed by two independent stereo compressors and a mixer to combine the low and high bands.