I run a Zenith into an Antelope Zodiac Platinum. Rather than opting for a Phoenix I got an Antelope Audiophile 10m clock for the Dac and an Intona Isolator 2.0 for the USB connection.
USB slaves the server to the DAC. While the Poenix improves the clocking of the server as well as provide galvanic isolation for the USB connection it does not improve the clocking of the DAC itself.
In my experience however, unless you run a top of the range DAc (MSB, DCS et al) that in itself is worthwhile doing. Also worth noting is the fact that USB cables have a major impact. I upgraded a solid core silver cable to a short Intona Reference cable with amazing improvement. In digital transmission timing accuracy is paramount, so short high quality cables and the best clock you can afford.
USB slaves the server to the DAC. While the Poenix improves the clocking of the server as well as provide galvanic isolation for the USB connection it does not improve the clocking of the DAC itself.
In my experience however, unless you run a top of the range DAc (MSB, DCS et al) that in itself is worthwhile doing. Also worth noting is the fact that USB cables have a major impact. I upgraded a solid core silver cable to a short Intona Reference cable with amazing improvement. In digital transmission timing accuracy is paramount, so short high quality cables and the best clock you can afford.