Very impressive, I used a Soundblaster Titanum HD with OPA2111A and LME49710HA Opamps for 8 years. Now 2018 I have an Asus STX II with Buson V6 Classic’s and I say another dimension of Sound and Space. Better clarity, realistic bass and crispy high’s. Together with the MPK mod a true pleasure. It takes 2 weeks to burn in to hear full gorgeous soundstage and details. Thank you for this experience. Greetings from Germany F. Hohmann