Over-Ear
Erzetich Pro
72Good
$3240
Full review dataErzetich Pro vs STAX SR-009D: which should you buy?
On aggregated review scores the STAX SR-009D comes out ahead with an HearWiki score of 88. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: STAX SR-009D - Outstanding overall at around $2640.
Over-Ear
STAX SR-009D
88Outstanding
$2640
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Erzetich Pro
Sound8.0
Value5.0
STAX SR-009D
Sound9.5
Value5.5
Specifications
| Spec | Erzetich Pro | STAX SR-009D |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $3240 | $2640 |
| HearWiki score | 72 / 100 · Good | 88 / 100 · Outstanding |
| Released | 2021 | 2024 |
| Audio | ||
| Driver | Planar magnetic | push-pull electrostatic circular sound element |
| Drivers per side | - | 2 |
| Frequency response | - | 5Hz-42kHz |
| Impedance | 43 Ω | 145000 Ω |
| Wireless | ||
| Bluetooth | - | none |
| Multipoint pairing | - | No |
| Battery | ||
| Wireless charging | - | No |
| Features | ||
| Active noise cancelling | - | No |
| ANC type | - | none |
| Transparency mode | - | No |
| Companion app | - | No |
| Custom EQ | - | No |
| Wear detection | - | No |
| Design | ||
| Weight | 740 g | 594 g |
| USB-C | - | No |
| Model code | Charybdis | - |
What reviewers said
Erzetich Pro
The Erzetich Pro is a high-end planar magnetic over-ear headphone aimed at audiophiles seeking a premium wired listening experience. It delivers a spacious, dynamic, and highly resolving sound, though its substantial weight and open-back design require a dedicated, stationary setup. This is a flagship-tier product for those prioritizing performance over portability or convenience.
- Pro:Exceptional resolution and dynamic range
- Pro:Immersive and wide soundstage
- Pro:Efficient enough for a range of amplifiers
- Con:Heavy and physically demanding to wear
- Con:Very high price point
- Con:Open-back design limits usage to quiet environments
STAX SR-009D
The STAX SR-009D is a premium electrostatic over-ear headphone that pushes the boundaries of high-fidelity audio with an exceptionally wide frequency response and transparent, detailed sound. Its open-back design and push-pull driver technology deliver a refined, airy presentation, but it demands a dedicated amplifier and a significant investment. This is a statement piece for audiophiles seeking the utmost in technical performance, not a casual listening device.
- Pro:Exceptional clarity and detail retrieval
- Pro:Very wide frequency range (5Hz-42kHz)
- Pro:Premium build quality with detachable cable
- Con:Requires specialized electrostatic amplifier
- Con:Very high price point
- Con:Open-back design leaks sound and offers no isolation
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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