Overview

The Austrian Audio Hi-X65 are open-back professional headphones designed for mixing and mastering. Founded by former AKG engineers, Austrian Audio brings measurement-first engineering with a proprietary 44 mm dynamic driver and ring-magnet motor. The design prioritizes low distortion, practical 25 Ω impedance, and robust metal hinges and headband.

Scientific Validity

\[\Large \text{0.6}\]

Manufacturer specs: frequency range 5 Hz–28 kHz, sensitivity 110 dB SPL/V, impedance 25 Ω, THD < 0.1% at 1 kHz [3].
Third-party: SoundStage’s lab shows very low distortion for a dynamic open-back, remaining under ~3% even at 20 Hz with 100 dB SPL, with benign behavior above the bass; the cumulative spectral decay also reveals a narrowband “hash” around 2.3–3.5 kHz. Sensitivity and impedance match the catalog values [1][2]. Frequency response is generally neutral-leaning but with treble lift above ~5 kHz and some mid irregularity, so it falls short of “transparent” neutrality. Overall, measured performance is solid but not class-leading.

Technology Level

\[\Large \text{0.7}\]

The 44 mm “Hi-X” high-excursion driver uses a ring magnet and CCAW voice coil to lower moving mass and improve transient response. The folding, metal-reinforced structure is robust and serviceable. These are thoughtful, modern implementations of established dynamic-driver practice rather than a fundamentally novel architecture.

Cost-Performance

\[\Large \text{0.9}\]

Current market price (review target): 314.33 USD (Amazon US, new) [4].
Cheapest equivalent-or-better comparator: Sennheiser HD 560S, an open-back wired reference with near-neutral frequency response (GRAS 43AG measurements) and low distortion (spec < 0.05% at 1 kHz; independent labs corroborate neutral tuning) [5][6][7].

Why equivalent-or-better: Same core functions (open-back, wired studio monitoring). Third-party measurements show HD 560S tracks a neutral target closely and exhibits low distortion comparable to or better than the Hi-X65 for mixing/mastering work [6][7].

Calculation: 268.06 USD ÷ 314.33 USD = 0.8528 → 0.9 (rounded to one decimal). Prices are new, widely available retail as of the review date.

Reliability & Support

\[\Large \text{0.7}\]

Build quality is above average for this class (metal yokes/hinges, detachable cables). Warranty/support are standard for pro brands; long-term fleet reliability data are still limited given the company’s relative youth, but materials and construction inspire confidence.

Rationality of Design Philosophy

\[\Large \text{0.8}\]

Design choices (low impedance for easy drive, emphasis on low distortion, serviceable construction) align with measurement-driven goals for professional monitoring without marketing gimmicks. Engineering trade-offs are coherent and user-oriented.

Advice

If you want a neutral, open-back monitor and value lowest price for equivalent measured performance, start with the Sennheiser HD 560S. Choose the Hi-X65 if you prefer its ergonomics/build and accept paying a bit more for broadly similar objective fidelity.

References

[1] SoundStage! Solo, “Austrian Audio Hi-X65 Headphones – Review,” https://www.soundstagesolo.com/index.php/equipment/headphones/308-austrian-audio-hi-x65-headphones, Oct 20, 2021.
[2] SoundStage! Network, “Austrian Audio Hi-X65 – Measurements (GRAS 43AG; Audiomatica Clio 12 QC),” https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=2631:austrian-audio-hi-x65-headphones&catid=263&Itemid=203, accessed Aug 15, 2025.
[3] Austrian Audio (official), “Hi-X65 Product Page – Specifications,” https://austrian.audio/products/hi-x65/, accessed Aug 15, 2025.
[4] Amazon US, “Austrian Audio Hi-X65 Open-Back Reference-Grade Headphones,” https://www.amazon.com/dp/B0953MWCX7, price observed 314.33 USD, accessed Aug 15, 2025.
[5] Amazon US, “Sennheiser HD 560S Over-The-Ear Audiophile Headphones,” https://www.amazon.com/dp/B08J9MVB6W, price observed 268.06 USD, accessed Aug 15, 2025.
[6] Headphones.com, “Sennheiser HD 560S – Technical Data / Review (GRAS 43AG measurements),” https://headphones.com/blogs/reviews/sennheiser-hd-560s-review-new-benchmark-in-headphone-neutrality, accessed Aug 15, 2025.
[7] RTINGS, “Sennheiser HD 560S Headphones Review,” https://www.rtings.com/headphones/reviews/sennheiser/hd-560s, accessed Aug 15, 2025.

(2025.8.15)