AS06 biggest effect was psychological visual one. Best looking KZ till date
second was AS10 sound with slight bass boost and some decay, making it natural
plus KZ AS06 has actual memory wire instead old era metal molding ear hook
get the silver-copper or silver-gold TRN or KZ new 8braid cable
they look and feel damn premium(no change in sound though, not a cable believer untill or unless they start using carbon Nanotube yarn for wire which is league better than silver, i mean 15Ms/s of CNT compared to 5Ms/s of silver and 3Ms/s of copper)
by the way, add 75ohm impedance adapter from dunu to any KZ except ZS10 and old era KZ(excpet ED9) and feed them power, ohh dayumm they sound so premium
KZ has issue with random peak burst and decay in treble which impedance adapter fix
second is wide bore eartips, because narrow bore tends to increase bass and peak at 7 to 8kHz region
KZ ES4 with Dunu 75ohm and stock eartips on Stray Kids "My Pace" makes the vocal intimate and lower the treble ssh treble sibilance and instrument on good stage. Not joking, it reminds of Senn HD660s of mine but better bass control due to IEM
KZ ZS10 treble dies
KZ AS10 loses impactful bass and seems way more extended and hall like stage comes in play, like Focal like sound imaging(Focal ELEX like Hall Image) and treble comes more mature
KZ BA10, sold off, not a cup of tea for me as bass was lean already and mid bass thump die, making mids coming in centre like A shape iem
due to reduced volume on adapter, lower volume and less peak treble point, make the bass shine and coherency issue is not a issue
plus i can crank it loud without harming my ear due to peak burst are also damped with low frequency impedance is smoothened up
so everything sounds effortless
this was my experience
I went for a 30ohm impedance adapter for a ZSN, just waiting for it. Let’s see...