'' Okay let me ask my digital question in another way ''........

Good morning Mr. Mahler 123  -  thank you for your response and also thank you for the suggestion. I have been doing a ton of research on this topic and the reason that some of these master clocks when added on  '' don't work sonically '' is due to the question that I have presented. There are difference in the signal being made ; sine vs square. The MUTEC Ref 10 SE 120 Master Clock is an incredible product and unbelievably engineered and I am looking at that over staying in the Esoteric line. But ...but... its signal is a square wave and even though Esoteric players will accept both signals  …...it does effect the overall sound. Sometimes good and sometimes bad. I am looking for someone here who has gone through what I am looking at now and has an educated and accurate response.                

I recently purchased audiophile network switch with TXCO clock, rest of streaming and network optimized prior to the switch purchase. Extremely disappointed with switch in system, yes, there was lower noise floor. The one great defect of the switch and added clock was image outline excessively sharpened, like cookie cutter images. I've surmised this was clock issue, as I've heard previous clock upgrades affect sound stage and imaging. Perhaps DCS owners and mahler123 heard this same defect.

I don't recall having previously heard about square vs sine wave signal mismatch, could be my issue. I'd assume the dcs folks had no such mismatch.

Thanks sns much appreciated. This is why I am doing my home work before buying anything. The MUTEC clock is a XCXO oscillator which if we a are talking about the same thing is different. There is a lot in adding a clock as they must match. I hope things work out for you and thank you.  

Just out of curiosity where did you find out the Esoteric clock input can take a square wave the manual says 0.5 to 1.0 Vrms sine wave. 

Mutec you're looking at has OXCO clock, oven controlled oscillator, this is superior to TXCO in my switch, My dac runs OXCO clock for usb input. Widely varied opinions on clocks leads me to suspect there can be possible overuse of clocks in individual systems. Result is an excess of image, sound stage precision, in my case, loss of spaciousness, airiness. In real life, individual performers or images blend into one another. Image quality of my system sans switch/clock replicates this, With switch/clock in system, its like individual performers in segregated anechoic sound booths .
YMMV