My only gripe with the zs6 is the isolation when walking in traffic, commuting etc. I had been considering buying the zsr for the isolation. How do the new ES4 and ED16 stack up against the zsr in terms of isolation?
ED16 is less bulky and isolates similar to ZSRs, didn't try ES4 but I guess it fits and seals like ZSTs. In my ear ZSR and ED16 have the best isolation, ED16 is smaller and sound more natural IMO. So I recommend ED16, very good IEMs.
Thanks for the isolation comments!
How much worse is the ZST/ES4 than the ZSR/ED16?
Have you compared other brands IEMs isolation? Or the KZ EDR2 style?