Summary: lack of high fidelity sound, bass it way overwhelmed hinder the mid and high, there's a mid hump bass, not good enough sub-bass, no punchy drum bass pedal. don't buy it, it's not worth it. even philips she3595 is so much better when using EQ in poweramp app for android.
Summary: These iems are better than some entry levels (Shure 215/ hifiman RE0/ RE 400/ Sennheiser CX300) with a wider soundstage due to the 13mm dynamic driver , however need serious burn in for at least 50 hours to shine , lack sub bass and treble , perfect with vocals (Norah Jones / Yael Naim/ Celine Dion), not so convincing with classical music even at 24/96, bass not punchy enough for electronic /dub but should be fine with reggae, pop and alternative genres.
Pros: level of details, vocals, soundstage
Cons: poor treble, need burn in for at least 50 hours , muddy with bad recordings
Summary: I bought this at the Sony Store and regretted by purchase for the first two days. They were very dull sounding. I found myself searching for eq setting to get some high frequency response. But on the third say I noticed the treble opening up. Previously select EQs became to bright. These will never be Grado-revealing, but the highs opened up to reveal a nicely balanced earbud. I won't even mention the bass because that was always fabulous.
Summary: here's a weird thing about them: these sounds punchy and more enjoyable if worn around the ear (worn somehow like se215), if worn normally, these sound little bit muddy and mainstream, unrefined and lacks punch. i don't know why, but it's true (might not work for you, don't blame me). wearing them around the ear is a bit tricky though!
Sound: After burn-in (and worn around ear), the soundstage is large, bass extended well and punchy.
Summary: These earphones are massive, they stick right out of your ear and are so uncomfortable. They are meant to be 'extra bass' but there is barely any bass to them. Not at all what I would expect from Sony as a brand. Disappointed.