Benefits of an external DAC


I need a sounding board from you folks.  I have a slightly upgraded Oppo 103 CD player that was a big SQ improvement over my Consonance tube CD player.  I need a DAC to take the stream from my iMac, turn into an analogue signal to my preamp.  Lots of folks rave about the benefits of an external DAC so, in progression, I got a Jolida tube DAC, a Schiit Gungnir, and a Channel Island Audio DAC.  I connect the Oppo to the CIA DAC with a coaxial cable.  I input the analogue signal from the Oppo into my preamp with RCA IC's.    

It is easy to switch between DAC in the path vs. the Oppo analogue signal straight into the preamp.  I tell ya, I have done the comparison between all three DAC's vs. the analogue signal run from the Oppo to the preamp and have been unable to discern any difference.   Zero, zip, nada.  I have done the comparison with lots of audio pals and nobody hears a wits worth of difference.

There clearly are lots of devotees using external DAC, but in my system (with a Don Sachs tube preamp, Pass Labs First Watt F5, and Spatial Audio M4 Turbo S speakers, with good cabling), I am perplexed as to why the use of an external DAC makes no difference in the SQ in my system. It sounds exactly the same.  

I am awaiting a demo of a Denafrips Ares DAC to see if this well-regarded DAC does something to the SQ -- one way or another.  So far, the employment of a DAC to improve the SQ of the signal from my Oppo has been an utter waste of time.  What am I missing?
whitestix

Showing 1 response by dlcockrum

Wisdom in that last post shadorne re: expectations. IME, there are the step-function improvements that result from moving step by step from mi-fi to hi-fidelity equipment, especially speakers and sources. Also getting the room right. Lots of "Holy Cow" moments during that phase. Lots of fun. This is the "audio enthusiast" phase.

Then the path becomes one of discovering the strengths and weaknesses of what was created in phase one. Some changes are usually inevitable depending on how wisely you chose and frankly how lucky you were re: the extent that changes are necessary. Lots of fallout in this phase so I think of it as the "sorting out" phase, both of equipment and also "the listener" that has now evolved (or fallen away).

Once that is sorted, then comes the phase of "the serious listener", comparing different very-good to excellent source components, improvements in cabling and the quality of AC power, vibration elimination, etc. Differences/improvement is often subtle compared to the earlier phase, but are just as significant to a serious listener as these things then determine whether you created a microscope, a telescope or merely some sunglasses.

All along the way, one learns, or should learn, not to hastily judge changes as it is almost always a mistake.

I do not agree however with prescribing things such as whether or not to use a preamp between DAC and amplifier as there are too many variables in each system and listener preferences, so others should simply be encouraged to experiment and decide for themselves.

Dave