What did a good 10 MHz clock do for your Gustard R26?


I'm auditioning an R26 and it's lovely (musical, high resolution in the microdynamics for example) but a little soft on the highest octave. The imaging is not great. On my speaker system (B&K ST120, Spendor S3/5) the images tend to collapse into left, right, center. I have a guy who does really impressive mods ... beefs up the power supply, adds ERS paper for shielding, bypass caps, etc.... but that's irreversible in case I don't like the result... I'm worried about it getting too bright after the mod. So I thought, why not try a good 10 MHz clock? I don't have the budget for a Mutec, but I could try a less expensive one and have my guy mod it and also create a good BNC cable for it. So I'm wondering what has a good 10 MHz clock done for your R26? Improve the extension on top? Improve the imaging? Has it changed the tonal balance in any way? I'd like more extended but not brighter.

magon
For the sake of argument, since I basically have a similar system as dspringham in above post, but unlike him I keep the dac on ext clock which provides a wider more expanded sound than using the int clock. I am of the school that thinks the entire chain gains from being on the same master clock, even I2s. At least it is true to my ears in this system.

 

When you run the clock cable to the DDC on Ext Ref and then I2S from DDC to DAC, the 10Mhz clock signal is supplied to the DAC via the I2S signal. There is no need to run another clock feed as external reference for the DAC. In this case, the DAC clock should be set to Internal. When used in this fashion with I2S It is redundant to run separate 10 Mhz clocks to both the DDC and the DAC. Saves the cost of an additional clock cable.

 

 

 

 

@audphile1 You're talking about my R26 right? Mine doesn't seem to match the descriptions of others' R26s. Like the imaging. I suspect mine is broken.

I got a Gustard 10 MHz clock, the $750 or so model, from Amazon, could return. After an hour of warmup of the clock (the R26 DAC was already warmed up), I hear an improvement in extension and tonal balance, more midrange where there seems to be an upper midrange recession in the stock R26. But it's a small difference. Call it one step of difference. I would want about 5 steps of difference to be worth $1000 (The Gustard clock plus Gustard clock cable plus tax). I don't think I'm keeping either the clock or the R26. Not sure what I'll do. Maybe just go back to previous DAC (a modified iFi iDSD Nano, surprisingly good after mods). And wait. Maybe try the Denafrips.

Yep I’m talking about R26. If you have a second unit that doesn’t sound right then you should be done. 
 

there’s a lot of hype going on around the LAiV Harmony DAC. May be try that? Seems to be receiving lots of praise from the reviewers.