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 budget IEM with a single dynamic driver, and here are my impressions.

Gear used

- Stock cable

- HE Sonic eartips

- HE Sonic Galaxy Edition eartips

- Penon Liqueur Orange eartips

- Snowsky Echo Mini

The Cozoy D1 IEMs and their vibrant purple braided audio cable resting on a white background. They are displayed next to two small, sealed clear plastic bags containing the included stock silicone eartips.

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

A top-down view of the Cozoy D1 in-ear monitors neatly displayed inside their black foam retail packaging. The glossy blue resin shells with the silver Cozoy logo are attached to a vibrant purple braided cable. The lower section of the foam insert features a compartment clearly labeled "ACCESSORY BOX".

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.

A macro photograph of the two Cozoy D1 IEM shells resting on a white textured background. The image highlights the deep glossy blue faceplates with subtle dark striations, the silver "COZOY" branding, and the ergonomic 3D-printed black resin inner body.

Cozoy D1 Review: Did the Classic Brand Return with a Winner?

Disclaimer

Intro

Gear used

Pros

Average

Cons

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Comments

A Bassy Boy Begging You to Crank Up the Vol - DUNU X KOTO ITO