Same here. I dont have any issue, treble is not ear-piercing to me even though I could be a basshead sometime. But I do miss the bass from the ZS3, I was having issue with seal on the ZS5 with medium tips, turns out that I need big tips for the ZS5 (M for ZS3). I'm using a Redmi Note 3 as a "dap". The ZS5 made me ditched Viper4Android, or at least depend a lot less on it. I now only use Spectrum Extension (1.0), Dynamic System (Extreme Headphones, 0% bass), AnalogX (Extreme) on V4A.