4/6, never picked 128kbps.

Used $50 Audio Technica ATH-M20X on $90 Behringer UMC202HD.

Did audio production in the past (amateur level).

Failed Coldplay, and Neil Young, the latter I argue has such poor source quality that it's hard to tell a difference.

Tip: listen to the "air" of you want to spot the difference, that's the first stuff the compressors throw away. "Air" is the ambient sound of the room, the tail of the reverb, the stuff you hear when you don't hear anything if that makes sense.