I am still continuing to test the use cases that
@NickT23 was asking about.
Spotify or Youtube source>poor quality recordings>laptop streaming>usb cable>mojo or hugo 2 >Beyer DT 770 Pro 250 ohms
He also asked about scalability of headphones, so I am also comparing the DT 770 Pro 250 ohms with my Aeon Flow Closed headphones.
My preliminary findings are that he must have an issue somewhere with his laptop, usb cable, quality of the music that he listens to, or headphones.
I disagree with those posters who insisted that all music on Spotify or Youtube is crap.
Using Spotify or Youtube source>good quality recordings>desktop streaming>optical cable>hugo 2 >Beyer DT 770 Pro 250 ohms and Aeon Flow Closed
- Beyer DT 770 Pro 250 ohms - generally the music is quite good quality, and listenable, but the transients feel slow and the music does sound slightly veiled
- Aeon Flow Closed - generally the music is good quality, and listenable, but now the transients feel much faster and the music does sound close to CD quality
I have yet to compare the usb input, or try the Mojo or a dap - but certainly my DT 770 Pro 250 ohms are coming out second best, in every test that I try. This answers one of my own questions - time to sell the Beyers.
So yes streaming good recordings>optical cables>a good dac> good headphones, allows a good music listening experience.
This influences my preliminary findings above, because
@NickT23 seems to be having such a bad experience
Inevitably using CD or FLAC stored on a SD card is better (from experience).