Creative Sound Blaster X7 High-Resolution USB DAC 600 ohm Headphone Amplifier with Bluetooth Connectivity 24-BIT 192KHZ HIGH-RES AUDIO FOR GREAT SOUND QUALITY  Hear more details and nuances of your audio playback, be it in games, movies, or music. KICKASS 100W STEREO AMPLIFIER  Highly efficient amplifier lets you enjoy powerful audio with crystal-clear details when you pair with the E-MU XM7, a pair of passive bookshelf speakers. KNOCK-OUT QUALITY DAC WITH DOLBY DIGITAL DECODING  The Burr-Brown PCM1794 127dB digital-to-analog converter (DAC), coupled with a built-in Dolby Digital decoder, lets you experience cinematic true-to-life 5.1 channel playback in high resolution. CLASS-LEADING HEADPHONE AMPLIFIER  top-of-the-range TPA6120A2 headphone amplifier is capable of driving high-end 600 headphones, delivering powerful and pristine audio. ADVANCED SOUND AND VOICE PROCESSING  SBX Pro Studio Technology adds a new level of immersion to your audio experience, while Crystal Voice Technology enhances audio pickup and focuses on your voice. Connectivity technology : Bluetooth