Sonics of Streaming

4 of my 5 do NOT exhibit the differences you allude to. Maybe try a different DAC. Or use a different cable.  
The only laggard is the first, a BluSound.

Streamers don’t all sound the same for the same reason that all DACs don’t sound the same. They’re still processing the digital signal, and slight differences in circuitry and components lead to slight differences in sound. 

Tried streaming at my cousins house with my music.
  Many songs Sounded flat to me.


   LP & CD, is the way to go.
it just sounds way better, bass tighter, guitar is much more realistic sounding, highs are not so subdued. 
 My main speakers are Energy RC-70s’, with the 600 MHz or hz roll off of the tweeter, a nice warm speaker, 
the tritons have a nice tweeter' much more powerful than my rc-70s’,
yet, the treble sounded even more subdued on much of the high treble music I listen to.


 Mostly 
motorhead
slayer
raven
Megadeth
assassin
kreator

humble pie
Foghat
CCR
Y&T
thin lizzy 
schenker
john denver
donovan

much more, tried all types of music.

 Your ears may be different than mine, just not for me.

 Happy listening. 
 Enjoy the hunt, that’s the fun part.

  

I meant streamer/transports -- digital-out processors with no integrated DAC. For example, the Aurender N10 versus the N100H.