Xonar dg head phone amplifier 51 pci sound card hear all dominate all the xonar dg is the latest addition to the already outstanding xonar range and is optimized for immersive gaming through precision audio at an affordable price the xonar dg sound card offers a combination of the dolby headphone 51 high definition surround feature asus own gx 25 gaming audio engine providing eax 50 support in even the latest windows 7 operating system and an on board headset amplifier with 3 settings