The Vision Insight+ DAC has been upgraded from its factory design to deliver the ultimate listening experience.
This unit was upgraded by Frank using the OPA627AP chips.
From the original listing:
"The Insight+ DAC is designed using the circuit simulation and math capability we have been developing for the past 15 years. Thousands of hours of original advanced math and circuit analysis programing went into modeling the complete circuit from digital input to audio output. Our results show, more clearly than ever before, every nuance of the circuit performance.
This allowed us to understand all significant (and not otherwise predictable) non-linearities, and then model improvements into the circuit. After multiple iterations of improvement, testing, modeling, and analyzing, we are convinced the circuit is as perfect as possible. Thus was born the Insight DAC, easily the best piece of solid-state audio equipment we have ever designed, and likely the best at any price from any audio manufacturer.
It provides a source for your audio system so pure and real that it makes any system all new again and gives you music more lifelike than you ever thought possible. Musicality and inner detail are breathtaking. You must experience the performance—intelligibility, space, definition, absence of fatigue, and purity of voices—to believe this kind of music from digital. Gone are the grainy and hard artefacts that have come to be associated with digital audio. What remains is an utterly dynamic, liquid, and pristine look into the music."
This unit is in great condition and sounds really nice with the upgraded chips.