Wired IEMs
FiiO FD7
84Great
$445
Full review dataFiiO FD7 vs STAX SR-003 MKII: which should you buy?
On aggregated review scores the FiiO FD7 comes out ahead with an HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: FiiO FD7 - Great overall at around $445.
Wired IEMs
STAX SR-003 MKII
68Good
$284
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
FiiO FD7
Sound8.5
Value7.0
STAX SR-003 MKII
Sound7.5
Value5.5
Specifications
| Spec | FiiO FD7 | STAX SR-003 MKII |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $445 | $284 |
| HearWiki score | 84 / 100 · Great | 68 / 100 · Good |
| Released | 2023 | 2012 |
| Audio | ||
| Driver | 12mm pure beryllium diaphragm dynamic driver | electrostatic |
| Driver size | 12 mm | 28 mm |
| Drivers per side | 1 | 1 |
| Frequency response | 10Hz-40kHz | 20Hz-20kHz |
| Impedance | 50 Ω | - |
| Sensitivity | 111 dB/mW | 110 dB/mW |
| Wireless | ||
| Multipoint pairing | - | No |
| Features | ||
| Active noise cancelling | - | No |
| Controls | buttons | - |
| Design | ||
| Weight | 11 g | 28.35 g |
| Case weight | - | 15 g |
| Detachable cable | Yes | - |
| USB-C | - | No |
| Model code | - | SR-003MK2 |
What reviewers said
FiiO FD7
The FiiO FD7 is a wired, flagship-grade in-ear monitor built around a single 12mm pure beryllium dynamic driver, housed in a semi-open design. It offers a spacious, refined sound with clean tonality, strong dynamics, and impressive detail retrieval, supported by a modular cable and tuning accessories. While easy to drive from most sources, its premium price and semi-open nature mean it targets enthusiasts seeking a high-end, natural presentation rather than casual listeners.
- Pro:Excellent clarity and natural tonal balance
- Pro:Wide, well-defined soundstage with strong imaging
- Pro:Highly resolving with good dynamics and detail
- Con:Lacks noise isolation due to semi-open design
- Con:Premium price may not suit budget-focused buyers
- Con:Requires burn-in or source matching for best results
STAX SR-003 MKII
The STAX SR-003 MKII is a niche electrostatic in-ear ear speaker that delivers the brand's signature speed, detail, and airy presentation, but it demands a dedicated amplifier and careful fitting to shine. It's best viewed as part of a premium, portable electrostatic system rather than a standalone IEM, offering a unique sound that comes with notable setup quirks and costs. The design is lightweight and open, but the stock tips and cable can be finicky for some users, making comfort a personal variable. Overall, it's a specialized tool for audiophiles seeking an unusual, high-clarity listening experience, not a casual everyday earphone.
- Pro:Exceptional transient speed and micro-detail retrieval
- Pro:Lightweight, open design with a distinctive electrostatic character
- Pro:Compact enough for portable use when paired with the right amp
- Con:Requires a dedicated electrostatic amplifier (not included)
- Con:Stock fit and accessories may be uncomfortable or unreliable for some
- Con:High total system cost for a complete portable setup
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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