Just had my ZSE's delivered a few hours ago.
First impressions : Really awesome for pop music ! As in really, really awesome ...!!!
There's plenty of bass in these, but not the booming, lumpy/ thumpy kind you often get out of many earphones. These have an effortless smooth ease in the bass delivery.
I could probably call it 'clean' but really full-bodied bass, if that's the correct way to describe the bass delivery.
Instrument separation is there but not quite the level of detail you would get from hybrids with a good BA driver on top of the Dynamic driver. In that aspect, the Urbanfun Hi-fi is better. But it sure loses out in the bass part of the delivery. I was comparing them back to back.
If individual instrument separation and detail are not critical, these are simply awesome. Not that they are bad,they are pretty good already and for most pop music that has a heavy beat, its already very good.
In short, I just had the best delivery of U2's classic "Where the Streets Have No Name" in years.
I'm not sure how another 12~24 hours burn in may help as there was that murkiness when it came to some vocals delivered at certain wavelengths/frequencies. Shall have to wait that out to know.
Edit:
Play source: LG G6,