For all KZ ZS5 owners out there who wants to make it's sound less U or V sahpe, here's an easy fix. I've been experimenting with tips rolling on the ZS5 for a while now and for those who yearn for a more neutral and balanced sound (which is not as U or V shaped) with very clear detailed mids from their ZS5, use the Comply T400 tips...and the next tip is very important...Use Comply T400 tips one size smaller than your normal size eg. my tips size is L but I use size M instead. Due to the nature of Comply foam tips, one size smaller tips still fit snugly for my ears and I no longer need to roll the tips between my fingers to make them smaller before insertion. This combi works superbly for me, the high frequency peaks are no longer there and the low frequencies are now tamed quite a bit and is actually tighter without the blooming/wooly bass effect. Mids are now very detailed and up front, percussive instruments have better transient attack and I'm actually very surprised with the ZS5 with this combi and I can now confidently say that it sounds as good or even better than many $100+ IEMs out there. I think I've finally found the perfect tips for me to pair with the ZS5
PS: The one size smaller Comply T400 actually attenuates the excessive bloat of the ZS5 and therefore result in a more controlled and tight bass yet retaining the low end extension, right down to 20Hz actually. It also attenuates the high frequency peaks and make the the ZS5 sound smoother yet retaining the high frequency extension. Due to the attenuation on both ends of the frequency spectrum, the ZS5 no longer sound bloated at the bottom and neither does it sound sibilant up top anymore....better still, the mids now become much more clearer and detailed because of the attenuation on both ends therefore the ZS5 does not sound as V shaped as the ZS5 paired with the stock tips. Percussive instruments' transient attack is therefore more prominet with a fast and snappy attack. This by far is the best sounding configuration of the ZS5 for me. Oh btw, this method does not apply to those who particularly like V shaped, nor bass-head level sound signature. This method only applies to those who loves a more balanced, more detailed and less V shaped sound signature. YMMV.