I was already highly satisfied with the Burson Timekeeper 3i Ref, but the Soloist Voyager takes performance to an entirely new level! My unit is a custom V7 Classic + Vivid, featuring SP2 and Fusion Core. The sound is incredibly clean and transparent, yet it also delivers powerful, punchy bass – comparable to the Cambridge Audio Azur 640 7x100W, even with demanding headphones. Additionally, its soundstage is as expansive and three-dimensional as my tube amp. Overall, the Soloist Voyager is an exceptionally impressive headphone amplifier!