The DacMagic 200M includes the ability to connect to a computer via USB to allow high-quality audio playback using USB Class 2.0 Audio. For this it is required that the DacMagic 200M is connected to a USB 2.0 port using a suitable USB cable, and we would recommend any USB certified, high-speed USB 2.0 ‘A–B’ cable.
For connections via USB, the DacMagic 200M includes a ‘ground/lift’ switch on the rear panel. When connected to a PC via USB, and with the switch set to ‘ground’, the DacMagic 200M will ground itself via the USB connection. Setting the switch to ‘lift’ will ground the device via an internal network to reduce any hum in case of ground loops.
If you are experiencing noise, or hum whilst connected via USB it may be necessary for you to set the switch to ‘lift’ the disconnect the ground from the computer connection. This noise can be introduced in several ways, most of which can be resolved by ‘lifting’ the ground.
In some instances, the use of audio grade USB cables can cause compatibility issues, and the introduction of glitches. This is because the cable may not fully adhere to USB standards. If you are experiencing noise, hum, or glitches whilst connected via USB it may be necessary for you to set the switch to ‘lift’, which will disconnect the ground from the computer connection.