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7Hz x Crinacle Zero: 2 vs KZ Castor Pro: which should you buy?

On aggregated review scores the 7Hz x Crinacle Zero: 2 comes out ahead with a HearWiki score of 83. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: 7Hz x Crinacle Zero: 2 - Outstanding overall at around $25.

Score breakdown

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

7Hz x Crinacle Zero: 2 leads on 4 of 4 measures.

  • 7Hz x Crinacle Zero: 2
  • KZ Castor Pro
HearWiki score
83
73
Sound
8.1
7.0
Value
9.8
8.7
Price (USD)
$25
$28

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

KZ Castor Pro (2024) against 7Hz x Crinacle Zero: 2 (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.

  • x Crinacle Zero: 22023
  • Castor Pro20241 yr newer

Specifications

x Crinacle Zero: 2Castor Pro
Type
Wired IEMs
Wired IEMs
Price (USD)
$25
$28
HearWiki score
83
73
Released
2023
2024
Availability
Still sold new
Still sold new
Driver
1DD
2× 10 mm dynamic
Driver type
dynamic
dynamic
Driver configuration
1DD
-
Driver size
10 mm
10 mm
Drivers per side
1
2
Frequency response
-
20 Hz - 40 kHz
Impedance
32 Ω
16 Ω
Active noise cancelling
No
No
ANC type
-
none
Transparency mode
-
No
Companion app
-
No
Custom EQ
-
No
Wear detection
-
No
Controls
-
buttons
Voice assistant
-
No
Detachable cable
Yes
-
USB-C
-
No
Connector
2-pin 0.78 mm
3.5 mm

What reviewers said

7Hz x Crinacle Zero: 2

The 7Hz x Crinacle Zero: 2 is a budget-friendly wired IEM that delivers a warm, fun sound signature with excellent tuning for its price. It's a highly recommended value pick that balances musicality with solid everyday performance, making it a worthy successor in the affordable audio space.

  • Pro:Excellent price-to-performance ratio
  • Pro:Warm, enjoyable tuning
  • Pro:Detachable 0.78 mm 2-pin cable
  • Con:No active noise cancellation
  • Con:Not a technical showcase
  • Con:Limited to wired use

KZ Castor Pro

The KZ Castor Pro is a budget-friendly dual-dynamic IEM that offers lively, adjustable sound via its quad-switch tuning system. With a strong focus on bass flexibility and overall value, it provides a comfortable fit and good technical performance for the price, though it may not drastically outperform the original Castor for everyone. It is particularly suited for bass-heavy genres and gaming, making it a versatile pick in the affordable segment.

  • Pro:Quad-switch tuning for flexible sound adjustment
  • Pro:Strong bass response and low-end control
  • Pro:Comfortable fit for long listening sessions
  • Con:May not be a major upgrade over the standard Castor
  • Con:Lacks advanced features like ANC or app support
  • Con:Sound signature might be too bass-forward for some listeners

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 comparison7Hz x Crinacle Zero: 2KZ Castor Pro