What are TCXO and Superclock?


What are TCXO and Superclock?
What are their differences?
Which one gives better performance on CD players?
What kind of improvements (of a modded player) over stock CD players should one expect to hear?
When looking for (good/excellent) aftermarket TCXO or Superclock, what should one look for?
ethifi
TCXO is a temperature controlled oscillator. The advantage is that the frequency tolerance is very tight.

Superclock is a module oscillator that has circuitry to minimize jitter in the output signal. It may drift and change frequency more than the TXCO, but absolute frequency is not that important in audio. The jitter is more important because the S/PDIF interface is affected by jitter.
My Eastsound CDP has a TCCO as standard. A importer borrowed mine and was really suprised that it was a all SS design. He was very suprised there weren't any tubes in the unit.

How much the TCCO contributes to the "analog/tube" sound I'm not sure. What I did find out reading on line was that a TCCO theoretically can cut timing errors to 1/20th of a non TCCO unit. How this works out in practice and the advantages in real life, as stated not really sure. I do know several CDP's above $4000 use the TCCO. Wadia, Gryphon and Gamut being among those

BW Maxx
I plan to mod my Marantz SA-14 v2 CD/SACD player and has two options: use a TCXO (available locally) or a Superclock (need to import).
If I understand Audioengr's point correctly, because TCXO has minimal/no circuit to minimize jitter, Superclock is a better choice to improve CD playback performance? I read that some superclocks use TCXO for the timing part.