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

 I started listening to the video... to much gesticulating and not fast enough information flow. 

I have owned a lot of streamers... from using PCs... modifying how they run, what software, using MacBooks on battery. Cheap streamers ( ~$300) up to the $22K streamer in my main system. 

First it depends on the quality and resolution of the rest of your system. The better it is, often the bigger the difference. 

The better a streamer the more it isolates you from the network: the noise and any latency or interruptions of network. I have had my streamer work flawlessly when I have not been able to switch browser pages on my iPad. 

Also, internally created noise and vibration, Great streamers have incredible power supplies... mine operates on battery that does not get charged when in use to drop the noise floor even more. 

All this adds up to dead silent, natural and detailed sound. A feat not easily accomplished in any high end audio component. 

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?