Why in some instances does changing streamers makes a bigger difference?

Thanks for the responses, I generally agree with your points.  The first portion of the video dispels with the notion that problems in sound quality arise from subtle problems in digital signal processing, either it works or it doesn’t, and when there is a problem, the result is obvious, clicks, dropouts or no sound.  His second associated point is that many modern streamers get handling of digital data from source to DAC right.  

His other main point is that challenges that can affect sound we experience from a digital music reproduction have to do with system related impacts to the analog signal coming out of the DAC.  Electrical noise generated in the streamer circuits or power supply can leak into non-optical digital cables and affect the analog circuits in the analog output of an external DAC, or easily affect the output of a built in DAC. Electrical noise can also be transferred to the mains and affect any other gear plugged into the same circuit (why power conditioning), and emf generated by the streamer or other gear can affect the analog circuits involved in digital music reproduction at any point in the chain.

So, in theory, if everything around the streamer in the system from power supply to connecting cables to DAC filtering and analog circuits are buttoned down, most steamers can supply an accurate digital signal for the rest of the system to process into good sound.  The problem with this logic is that an inexpensive streamer with “perfect” digital processing can still generate a lot of noise that can be heard on the analog side of things.  Why replacing the stock switching supply in a Bluesound Node with a quality linear supply helps and why @ghdprentice chose a streamer that runs off a battery when playing.  And why every cable in your system matters.

kn

Much has to do of the quality of the streamers you are matching in $$

the better ones will have several linear power supplies  ,plenty of storage capacitance as well of vibrational isolation .

one not too expensive improvement is getting rid of the cheap stock fuses 

I have been using AUDIO magic  masterpiece 2 fuses  in dac ,and streamer 

amplifier each fuse after 6 days made a very welcome improvement , streaming sounds more natural  and detailed , and ALFRED OFFERS A 30 day trial period .

very little risk and imo better then the synergistic masterpiece fuse ,more natural  sounding.

Are you saying it took 6 days of using these fuses to hear improvement?

There like computers they have different engineers designing and differing levels of quality parts. The ess dac chip is advertised at around 200$ but some companies charge 109 pluss k for them. Then we could talk about wire and is there a difference in cables as I've seen some advertised > 70 k. Some like the all in one because they have a shorter distance between components.hope you have audio stores or audio clubs you can go listen to on different components. Enjoy the search.

I dont know much about streamers. Ive only had and still use Bluesound Node 2i using ethernet cable. I really like the app. Very consistant streaming, Qobuz. No issues after 4 years.

A noticeable improvement occured after moding the sps to a board that lets me use an external lps, Keces in my case. Also, bypassed the Nodes dac and running it through, first, a Geshelli J2 now a MDHT Orchid with upgrade tubes. 

Im happy with the sound even though vinyl is the better part of my system. Like vinyl there are very good, good and bad digital recordings.

 I would probably have to make a huge upgrade in a streamer to notice a significant improvement.