What is your source? The jitter of the source is usually more important than the DAC.
If you are using a Transport, this is likely the problem. Reclocking with a good resampler like the Synchro-Mesh can make all the difference.
Here are plots of typical transport jitter:
https://www.audiocircle.com/index.php?topic=154408.0
Steve N.
Empirical Audio