Attached photo shows a Marantz CD-80 done right with the EZ Ultimate Clock System. No sense using a non-pedigreed CDP.

The original clock crystal was “fixed up” on the same socket used by the EZ Ultimate Clock so we could plug in one or the other for quick and convincing comparison.
The EZ Ultimate Clock System was a significant improvement, despite the fact that clock still needs to go through the SAA7220 as we used the “crystal emulation” mode (EZ installation).

Photo shows the CD-80, also with the UTS installed and with the Clock & Supply fitted.
The UTS too provided a major upgrade over the original analog stage, despite being already fitted OPA627 Op-Amp’s and many other upgrades including Elna Silmic Caps and Sanyo Os-Cons (as you can see).