In that case, I would rank them:
1. ZS1 v1
2. ZSN
3. ZSN Pro
4. ZS4
5. ED9
But keep in mind that >$20 used to be KZs bread and butter. There’s a lot of great budget choices in that price range that didn’t make the list - ZSR, ZS5 v1, HDS3, ATR, ATE, EDR1, etc
Thanks.
If a certain IEM with a piezoelectric driver were made by KZ, would it make the list ? I'm thinking of getting one.
Wish KZ would release a IEM with a piezoelectric driver. Reading about the other one seems to suggest there are QC issues.