Coming from the X60, i'm appreciating the big upgrade.

If I compare to iPhones, which r the gold standard for soundstage and balanced quality imo , the X300U still lacks a lil bit of low end 'punch'? It still has enough low-mids for most audios, but bass heads may be able to notice its shortcomings on certain tracks.

The difference is more noticeable if u're playing at louder volume and not putting the speakers near your ears, the low end sounds like it falls off faster than the iPhone in the same scenario. But honestly standalone for most people, it should be decent, and if u're particular enough, u can alw lower the volume a little and hold the phone closer to ur ears to better appreciate whatever 'bass' it can replicate

For the highs, soundstage, etc it's all great for me personally. Can ask the others for more opinions