Over-Ear
Erzetich Air
55Average
$3260
Full review dataErzetich Air 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 Air
Sound6.0
Value3.0
STAX SR-009D
Sound9.5
Value5.5
Specifications
| Spec | Erzetich Air | STAX SR-009D |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $3260 | $2640 |
| HearWiki score | 55 / 100 · Average | 88 / 100 · Outstanding |
| Released | 2020 | 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 Air
The Erzetich Air is a high-end planar magnetic over-ear headphone priced around $3260, designed for wired listening without active noise cancellation. It features a 43-ohm impedance and a substantial 740-gram build, suggesting a focus on audiophile-grade sound quality rather than portability or convenience.
- Pro:Planar magnetic drivers offer detailed, low-distortion sound
- Pro:High-end price point reflects premium materials and construction
- Pro:Wired design ensures consistent, lossless audio transmission
- Con:Heavy 740-gram weight may cause discomfort during long sessions
- Con:No active noise cancellation limits use in noisy environments
- Con:Expensive for most consumers, targeting niche audiophiles only
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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