Disclaimer
This set was sent directly by Cozoy in exchange for an honest review. You can find it in their official AliExpress store.
Intro
Cozoy is a brand that more seasoned Chi-Fi enthusiasts may remember. After a long period of inactivity, it was acquired in 2025 and is now led by the former EPZ IEM tuner. The D1 marks their return. It is a single dynamic driver budget IEM, and here are my impressions.
Gear used
- Stock cable
- HE Sonic eartips
- HE Sonic Galaxy Edition eartips
- Penon Liqueur Orange eartips
- Snowsky Echo Mini

Pros
- Great attack and decay for the price
- Precise imaging
- The 3D-printed shell is very comfortable and works especially well for smaller ears
- Cable and shells look very good in person
- Excellent isolation with the Galaxy tips
Average
- The tuning follows Harman 2019 quite closely. It is not my personal preference, but it may suit your taste
Cons
- Bass sounds slightly detached with most eartips, except for the HE Sonic Galaxy Edition
- Soundstage is very narrow and mostly in-head
- Being Harman-leaning, it lacks some air and pushes vocals a bit too forward for my taste
- The included eartips are a bit odd, and I struggled to get a proper seal with most of them

The D1 feels like a solid restart for Cozoy. I think most people will find it enjoyable, and the technical performance is strong for the price.
With the HE Sonic Galaxy Edition tips, it becomes a genuinely enjoyable set. I would like to see Cozoy experiment with other tuning styles in the future. The potential is clearly there.




