Digital clock - any recommendations?

What are you gonna use the external clock with? Does your preamp/integrated also have a word clock jack? You don’t just plug it into your transport/player. 
 
Or are you talking about a re-clocker? 
 
As I’ve stated on this forum, there is no real technical benefit to DSD in regard to music listening, so I wouldn’t be worried about losing it. 
 
As also discussed, the Esoteric is a multi-box digital system, the clock is used to sync all the components, it is not needed if you are just going analog out from your Marantz to your preamp/integrated.  
  
Room treatment, room correction, and subwoofers would add magnitudes more benefit.

“As I’ve stated on this forum, there is no real technical benefit to DSD in regard to music listening, so I wouldn’t be worried about losing it”

Please spare us with your worthless knowledge on DSD, jitter and anything that has to do with digital. You keep peddling your generalizations and bookish knowledge off the internet. As I have asked you in the past, before you share anything here; please state if you have any direct experience with the components in discussion.

Which preamp / Integrated has a word clock jack…please do tell us.

Y@tzh21y I’m sure you know this but be sure you get a clock that offers 44.1kHz multiple outputs not just 10MHz. The Mutec Ref10 I use or the Abendrot Stute I linked to are 10MHz only and to be used as a Master reference for a playback frequency clock such as the dCS models.

Any of the Esoteric models will work fine or the dCS Rossini or Puccini u clock or the Mutec MC-3, of course any of these can then also have a 10 MHz reference added ... it can get pretty spendy 😉

@folkfreak

Name an audible benefit DSD provides over PCM; or explain an audible defect of PCM. To save time, “smearing” isn’t a valid response. PCM perfectly captures the waveforms below Nyquist and even undithered 16Bit has a larger dynamic range than our rooms allow. 16/44.1 is audibly perfect, assuming your DAC is good enough, it is easily verified by measurements/math as well as human trials; it’s all marketing.
  
Here’s a preamp with an internal word clock in/out
 

Direct experience makes no difference if it’s under sighted conditions. There is a company that sells anti-vibration stickers, and people believe they work.

And again, OP has never stated what he owns except the Marantz, so maybe an external word clock can’t even be used. Multi-box systems for residential use are extremely rare. I stated pre-amp for if one had a digital input that OP would use for plain CD, meaning if it was better than the DAC in the Marantz, which would be used for SACD. As again, What would this external clock going to be syncing, the Marantz and what?

And I still don’t buy that an external upsampler vs an internal one makes an audible difference, 44.1kHz filter performance by the Benchmark DAC3B, which internally upsamples to >200khz, no audible aliasing or imaging, or are you saying the Vivaldi performs worse than a $2K DAC?

Stereophile measurements show the Marantz is of transparent performance, so there is no need to add any tweaks for analog output.

Spending $4K on an external word clock for residential use is just throwing money down the drain.

Hey, if there’s no advantage to DSD how come DSD CDs sound so good? I have a bunch. Am I the unwitting victim of psychological mischief? 😳 Do my ears need a good candling? 🕯