External clock for Rose 130

ROSE Products RS130
#41

Using Gustard C18 master clock into RS130 via 50 ohm square wave connection with good results.

On good recordings the leading edges of notes, space and depth are superior to onboard clock to my ears. The midrange also seems more transparent highlighting more detail. The downside on poorer recordings it shows warts and all. The joy is with a button flick I can return to onboard clock or for a warmer presentation flick to the USB output and let the DAC to its asynchronous role bypassing both clocks. The joy of choice :grin:

20240621_170912
20240621_1709124032Ɨ3024 2.31 MB

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#42

I have both MSB DAC and RS130 streamer : MSB Word clock frequency is 22,579 MHz for 44.1KHz (or its multiples) signals, or 24,576 MHz for 48KHz (or its multiples) signalsā€¦ Cannot be input to the RS130, which requires a 10 MHz external clock ! I use a Cybershaft on my RS130, which improves layer separation, attaks and mostly decays. My 2 cents.

#43

Thank you so much. I wonder if it can be adjust by later firmware version or it is hardware matter.

#44

It is hardwareā€¦ No 10 MHz is generated by MSB DACs, but you may want to use an 10MHz external clock on the RS130.

Beyond the basic coaxial input and the already pretty good renderer (if you are ready to use Roonā€¦), you should try MSB USB input modules, especially the fiber PROISL comboā€¦

#45

Yes Iā€™m using msb renderer module. Iā€™m curious how good it is due to budget/performance for investment option:
1- rs130 coxial and ext clock to msb
2- rs130 + msb usb module
3- msb usb module + roon nuc.

Off course add rs130 on opt 2 is probably the best but how much it better than opt 1 as I still have some doubt about usb connection as it mostly bypass many high quality components a good streamer is equipped

#46

I use LHY OCXO EXTERNAL CLOCK TO CONNECT TO SWITCH / DAC / DDC. SOUND IMPROVEMENT CAN BE RELISED CLEARLY.

I USE HOLO RED AS STREAM TO CONNECT WITH DDC GUSTARD U18.

I CAN SAY THAT USING EXTERNAL MASTER CLOCK OXCO WILL MAKE SENSE. BY THE WAY, I CAN NOT REALISE SOUND IMPROVEMENT WHEN USING 2 SWITCH TO BE CONNECTED BY SFP PORT.

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#47

Hi ZABOKS,
Whatā€™s the impression you had with LHY OCK-2 ? Do you think it worths adding to the system?

#48

Hi,
Which cable do you use ? 50 ohm or 75 ohm ? square wave or sine wave ?

#49

Hi, iā€™m using a Cybershaft OP19A (sine wave), connected with a 1.5m 75 Ohm Cybershaft silver cable. It adds extra layering and improves note attaks.

Iā€™m not sure ock-2 clock specs are so much better than the INTERNAL OCXO, so I cannot predict its effetsā€¦

#50

Noted and thank you for the information.

#51

I can add that iā€™m using LHY SW6-SFP Switch (connected with Fiber to my RS130) which has probably the SAME INTERNAL OCXO than the OCK-2.

I also noticed some improvement by connecting its external clock input to my CYBERSHAFT clockā€¦

#52

Thanks a lot.
In your opinion, which one provides more improvements, the OCK-2 or the SW6-SFP ?
Also, are you using the SFP module coming with the LHY siwtch ? From spec, it is a SFP+ 10G module. There are people saying that SFP+ module is not recommended.
I am interested to buy the LHY OCK-2 clock and FMC receiver.

#53

Again, I donā€™t have the OCK-2, but a (better) Cybershaft.
I can tell though that the improvement due to this external clock is more important on the RS130 than on the SW6-SFP.
Iā€™m using FINISAIR 1310 dual simplex SFP modules, as recommanded by ROSE.

#54

Noted. Thanks very much.

#55

@ROSEHAN, I know this is an older thread, but is there any recommendation as to whether the 50 Ohm or 75 Ohm input is better?

Also, what will be the technical impact if a square wave clock is used?

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#56

@Tony22

Square wave has relatively low power efficiency and more EMI.
It also increases power consumption due to fast transitions.

Sine wave has low power loss and high efficiency due to smooth current transitions.
It also has excellent signal quality and low electromagnetic interference.

When connecting an external clock to RS130, both sine and square waves can be connected, but sine wave is recommended.

#57

Interesting, however -

The steep rising edges of a square wave provide for less ambiguity for the chips detecting clock transitions.
With a sine wave, the low slope means the time variations are large.

In addition, any 10MHz clock is going to be fed through some variety of clock synthesizer circuit to produce the frequencies actually required by the chips or circuits. The input receivers of most clock synthesizers are very sensitive to AM noise, which is much more prevalent with sine wave clocks. But for the same amplitude modulation amount a square waveā€™s time variation will be MUCH less. In other words, an input receiver is typically much more sensitive to AM on a sine wave than with a square wave.

John Swenson has written about this. Iā€™ll assume you all know who he is. :slightly_smiling_face:

#58

Regarding sine vs square.
No termination is perfect. Thus there are reflections down the cable and back. The harmonics, in the square wave, will arrive at different times than the fundamentals.

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#59

Anybody here in the meantime with RS130 on Mutec Ref10 Nano ?

#60

I have both mutec ref 10 and esoteric . Both are good.

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