Yes. Passive for a long time now. Sources: Marantz SACD player (Single-Ended out to Freya, or SPDIF out to Yggdrasil) T+A Dac8 DSD (Balanced out to Freya) Yggdrasil (Balanced out to Freya) Amplifiers: DIY M3 Balanced Headphone Amp (Balanced in from Freya) DIY Single-Ended Tube Amplifier (2A3 or 300B) (Single-Ended in from Freya) Speakers: Klipsch Heresy IIIs Headphones: HD800 LCD-X HD600 HD650 AKG501 With my speakers in my listening space (treated with GIK acoustic panels) I get a spacious soundstage that goes around the speakers, nice extension hi/low, detail, good imaging. It doesn't sound dark, soft or congested. Soundstage depth is problematic in my space because the speakers are only about 1-2ft from the front wall, and I have a television setup in between. Front wall to back wall is only 12ft. So, I can't blame the Freya for that. Also, changing output tubes in my tube amplifier does make a noticeable difference in presentation. But, I'm willing to try the SYS in my setup.