No, the X-Dac does NOT have an I2S port, and no the USB is not an I2S port, CNiker. They are not the same. USB is a pc-based universal serial bus connection; I2S was developed as a micro-link between circuit boards and has become a sort-of purist connection for DACs as it connects directly into the DAC chip and is typically the native DAC connection, bypassing further jitter-producers. Other DACs that have I2S as options include the Perpetual Tech,Zanden and Audio Logic. I didn't think the Benchmark USB had an I2S connection stock; it needs to be modded (WEmpirical Audio, for example).
Best USB DAC implimenting I2S under $2.5K?
Other than the Benchmark DAC 1/USB are there any other hi end DACs that can utilize I2S from the USB port of a MacBook Pro? Does the Corda Opera, Stello DA220, Wavelenght Brick, Electrocompaniet ECD1, Bel Canto Dac-3, Apogee DA-16X ,Music Fidelity DM25 or any others have this capability???