7Hz x Crinacle Zero: 2 vs HZSOUND HEART MIRROR: which should you buy?

On aggregated review scores the 7Hz x Crinacle Zero: 2 comes out ahead with a HearWiki score of 79. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

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

Wired IEMs

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
HZSOUND HEART MIRROR

HearWiki score

Sound

8.1

6.9

Value

9.8

6.4

Price (USD)

$25

$49

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

The 7Hz x Crinacle Zero: 2 is 3 years newer, but it is 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. For 3 years between them, that is a thin return - treat this as a restyle rather than a new platform.

x Crinacle Zero: 220233 yr newer
HEART MIRROR2020

Specifications

x Crinacle Zero: 2HEART MIRROR

Type: Wired IEMs; Wired IEMs
Price (USD): $25; $49
HearWiki score: 79; 63
Released: 2023; 2020
Availability: Discontinued; Discontinued
Driver: 1DD; 10 mm dynamic
Driver type: dynamic; dynamic
Driver configuration: 1DD; -
Driver size: 10 mm; 10 mm
Drivers per side: 1; -
Impedance: 32 Ω; 32 Ω
Active noise cancelling: No; -
Detachable cable: Yes; -
Connector: 2-pin 0.78 mm; -

Specification comparison of 7Hz x Crinacle Zero: 2 vs HZSOUND HEART MIRROR
Spec	7Hz x Crinacle Zero: 2	HZSOUND HEART MIRROR
Type	Wired IEMs	Wired IEMs
Price (USD)	$25	$49
HearWiki score	79 / 100 Great	63 / 100 Good
Released	2023	2020
Audio
Driver	1DD	10 mm dynamic
Driver type	dynamic	dynamic
Driver configuration	1DD	-
Driver size	10 mm	10 mm
Drivers per side	1	-
Impedance	32 Ω	32 Ω
Features
Active noise cancelling	No	-
Design
Detachable cable	Yes	-
Connector	2-pin 0.78 mm	-

What reviewers said

7Hz x Crinacle Zero: 2

The 7Hz x Crinacle Zero: 2 is a budget-friendly dynamic IEM that delivers a warm, engaging sound signature with impressive tonal balance for its price. It stands out as an easy recommendation for everyday listening, offering strong performance and value without trying to be a technical marvel.

Pro:Excellent tuning for the price
Pro:Warm and fun sound presentation
Pro:Removable cable with standard 2-pin connector

Con:No noise cancellation
Con:Not a technical showcase
Con:May lack detail for critical listeners

HZSOUND HEART MIRROR

The HZSOUND Heart Mirror is a budget-friendly wired IEM that delivers a neutral-bright sound signature, prioritizing vocal clarity and natural timbre over booming bass. It offers solid build quality and a mature, reference-leaning tuning that appeals to listeners wanting a balanced, monitoring-style experience rather than a V-shaped, fun-oriented response. The main drawback is that achieving an optimal fit and seal may require experimenting with different ear tips. Overall, it stands out as a strong value pick for those who favor clean, articulate sound over bass-heavy presentation.

Pro:Clear and articulate vocal reproduction
Pro:Natural timbre with a clean, balanced presentation
Pro:Excellent value for a reference-style tuning

Con:Fit and seal can be finicky, needing tip rolling
Con:Not for bass lovers seeking a fun, V-shaped sound
Con:Neutral-bright tuning may come off as lean to some listeners

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

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