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CVJ KE-S vs KZ Castor: which should you buy?

Specs, scores and condensed review verdicts for the CVJ KE-S vs KZ Castor, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

KZ Castor leads on 3 of 4 measures.

  • CVJ KE-S
  • KZ Castor
HearWiki score
-
73
Sound
-
6.8
Value
-
9.0
Price (USD)
$10
$16

Generation & platform

The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?

Same generation

Both shipped in 2023. These are the same generation of hardware - nothing in the radio, the codecs or the noise cancelling separates them. Nothing separates them on convenience features either, so the choice comes down to tuning and price.

  • KE-S2023
  • Castor2023

Specifications

KE-SCastor
Type
Wired IEMs
Wired IEMs
Price (USD)
$10
$16
HearWiki score
Not scored
73
Released
2023
2023
Availability
Discontinued
Still sold new
Driver
-
2× 10 mm dynamic
Driver type
-
dynamic
Driver size
-
10 mm
Drivers per side
-
2
Frequency response
-
20 Hz - 40 kHz
Impedance
-
31 Ω
Sensitivity
-
105 dB/mW
Active noise cancelling
-
No
ANC type
-
none
Transparency mode
-
No
Companion app
-
No
Custom EQ
-
Yes
Wear detection
-
No
Controls
-
none
Detachable cable
-
Yes
USB-C
-
No
Connector
-
3.5 mm

What reviewers said

CVJ KE-S

The CVJ KE-S is a wallet-friendly wired in-ear monitor that relies on a single dynamic driver to deliver sound. It uses a standard QDC-style two-pin connector and is aimed squarely at first-time buyers or anyone seeking a no-frills, ultra-affordable listening solution. With no active noise cancellation, it keeps things simple and purely analog.

  • Pro:Very affordable price point
  • Pro:Lightweight and comfortable fit
  • Pro:Standard 2-pin connector allows cable swapping
  • Con:No noise isolation features
  • Con:Build quality may feel basic
  • Con:Limited soundstage and detail retrieval

KZ Castor

The KZ Castor is a budget-friendly in-ear monitor with dual dynamic drivers and adjustable tuning switches, offering a fun, energetic sound that punches above its price. It's particularly well-suited for bass lovers and gamers, though its technical performance and accessory package are only average for the price.

  • Pro:Adjustable tuning switches for sound customization
  • Pro:Strong bass response and energetic sound signature
  • Pro:Good build quality and comfortable fit for the price
  • Con:Average technical performance and detail retrieval
  • Con:Stock cable and accessories feel cheap
  • Con:Slight treble sibilance and artificial vocals at times

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

Compare something else

Swap either side out, or start again from the picker.

New comparisonCVJ KE-SKZ Castor