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7Hz Sonus vs KZ PRX: which should you buy?

On aggregated review scores the KZ PRX comes out ahead with a HearWiki score of 80. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: KZ PRX - Great overall at around $55.

Score breakdown

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

KZ PRX leads on 4 of 4 measures.

  • 7Hz Sonus
  • KZ PRX
HearWiki score
73
80
Sound
7.4
7.8
Value
8.0
8.6
Price (USD)
$60
$55

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 PRX (2024) against 7Hz Sonus (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.

  • Sonus2023
  • PRX20241 yr newer

Specifications

SonusPRX
Type
Wired IEMs
Wired IEMs
Price (USD)
$60
$55
HearWiki score
73
80
Released
2023
2024
Availability
Still sold new
Still sold new
Driver
1DD + 1BA hybrid
planar magnetic
Driver type
hybrid
planar
Driver configuration
1DD + 1BA
-
Drivers per side
2
-
Impedance
30 Ω
15 Ω
Detachable cable
Yes
-
Connector
2-pin 0.78 mm
-

What reviewers said

7Hz Sonus

The 7Hz Sonus is a budget-friendly hybrid IEM that delivers a balanced, detailed sound with controlled bass and articulate treble, punching well above its price point. Its neutral tuning with a sub-bass lift and forward mids suits analytical listeners, though its average build quality and occasionally bright treble may not appeal to everyone.

  • Pro:Excellent detail retrieval and technical performance for the price
  • Pro:Balanced, genre-versatile tuning with clean bass
  • Pro:Strong value in the sub-$100 IEM market
  • Con:Treble can be sibilant or fatiguing for sensitive ears
  • Con:Build and included cable quality feel average
  • Con:Shell design may cause fit discomfort for some users

KZ PRX

The KZ PRX is a budget-friendly planar magnetic IEM that offers a balanced, warm-leaning sound with strong detail retrieval and capable imaging for its price. It excels in sub-bass presence and smooth mids, though it demands proper amplification and ear tips to perform at its best. Its soundstage is decent but not exceptionally wide, and the stock cable is a noted weak point.

  • Pro:Excellent value for a planar IEM
  • Pro:Balanced, warm sound with good detail
  • Pro:Strong imaging and separation for the price
  • Con:Requires a capable source and good ear tips
  • Con:Stock cable limits performance
  • Con:Soundstage is only medium-sized

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 SonusKZ PRX