The Topping D90SE Desktop DAC is a converter for many digital signal sources. USB (Universal Serial Bus) coaxial optical & AES inputs can all be sent through the DAC circuitry in this device. What makes this one of the top range models is the inclusion of MQA support. Now you can listen to the music exactly as its heard in studios. D90SE supports up to 384k Hz PCM as well as DSD at 256 bits. With this range you can listen at whichever quality you may own music without any loss of fidelity. The D90SE is a very simple addition to your setup. Simply plug the device into your mac or pc with no additional drivers required. Additional software is required for playing the highest quality files. The D90SE has a preamplifier function built into the unit allowing you to connect to power amplifiers or speakers with little to no noise. For further expansion possibilities the D90SE partners up well with the A90 headphone amp.