The DCS clock is a standard OCXO of pretty good spec.
Using the master clock input on the DCS clock, you can use an external master clock which might improve sound.
Options for master clock are:
1. GPS clock - not a good choice because of poor short term stability
2. Rubidium clock- can be a real improvement however basic rubidium also has poor short term stability and you really need something where rubidium and OCXO are working together to get better performance.
3. BVA OCXO clock which is ultimate short term stability but at a price. Only commercial unit designed for audio use costs $35k!
BVA really makes a huge difference to sound quality in removing any hint of digital edge.
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