Over-Ear
STAX SR-009D
88Outstanding
$2640
Full review dataSTAX SR-009D vs Ultrasone Edition 15 Midnight: which should you buy?
Specs, scores and condensed review verdicts for the STAX SR-009D vs Ultrasone Edition 15 Midnight, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.
Over-Ear
Ultrasone Edition 15 Midnight
Not yet scored
$2999
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
STAX SR-009D
Sound9.5
Value5.5
Ultrasone Edition 15 Midnight
No sub-scores yet - not enough rated reviews.
Specifications
| Spec | STAX SR-009D | Ultrasone Edition 15 Midnight |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $2640 | $2999 |
| HearWiki score | 88 / 100 · Outstanding | Not scored |
| Released | 2024 | 2018 |
| Audio | ||
| Driver | push-pull electrostatic circular sound element | GTC (Gold-Titanium-Compound) transducer |
| Driver size | - | 40 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 5Hz-42kHz | 5Hz-48kHz |
| Impedance | 145000 Ω | 40 Ω |
| Sensitivity | - | 94 dB/mW |
| 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 | 594 g | 320 g |
| Detachable cable | - | Yes |
| USB-C | No | - |
What reviewers said
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
Ultrasone Edition 15 Midnight
The Ultrasone Edition 15 Midnight is a premium semi-open over-ear headphone built around a Gold-Titanium-Compound driver, aiming to blend rich, musical tonality with technical accuracy. Its construction features cherry wood cup frames, an aluminum headband, and magnetic ear pads, plus detachable LEMO cables for flexible connectivity. Priced as a luxury model, it targets audiophiles seeking a warm yet detailed listening experience with high-end materials.
- Pro:Warm, musical sound signature with solid precision
- Pro:Luxurious build using cherry wood and aluminum
- Pro:Detachable LEMO cables for easy replacement or upgrade
- Con:Very expensive at around $2999
- Con:Sensitivity of 94 dB/mW may require a powerful amp
- Con:Semi-open design may not isolate well in noisy environments
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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