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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want an open-ear, wire-free companion for running, commuting and all-day wear, choose Anker Soundcore AeroFit 2; if you need a wired, closed-back over-ear headphone for critical listening and studio-style work, choose Austrian Audio Hi-X20. These two barely compete for the same buyer — they solve completely different problems — so the right pick comes down to how and where you actually listen.
• Anker Soundcore AeroFit 2 — biggest strength: an open-ear, ear-hook design with 4-level adjustable hooks, up to 10 hours per charge (42 hours with the case) and Bluetooth 5.4 with LDAC for Hi-Res wireless audio.
• Anker Soundcore AeroFit 2 — biggest trade-off: by design it does not seal or isolate your ears, and it lists no active noise cancellation — you stay aware of your surroundings, which is the point, but it means no isolation from noise.
• Austrian Audio Hi-X20 — biggest strength: a closed-back, over-ear, wired design with proprietary 44 mm Hi-X drivers, a wide 12 Hz–24 kHz range and replaceable memory foam earpads for long sessions.
• Austrian Audio Hi-X20 — biggest trade-off: it is wired only (3.5 mm jack, detachable 3 m cable), has no Bluetooth and no battery, so it is tethered to your source and not built for movement.
• Who each pick is for: AeroFit 2 for people who want untethered, situational-awareness listening on the move; Hi-X20 for people who want a stable, isolating, wired headphone at a desk or in a studio.
The AeroFit 2 is built around one idea: keep your ears open. Instead of plugging or sealing your ear canal, it hangs on an ear hook and fires sound toward your ear using directional acoustic tech, which Anker says keeps audio private while minimizing leakage. The hooks adjust across four positions, so the fit is meant to suit a very wide range of ear shapes rather than a single "average" ear. If you have ever given up on earbuds because they never sat right, that adjustability is the headline feature.
On the audio side, it uses 20 mm × 11.5 mm racetrack drivers with BassTurbo acoustics, and the spec sheet lists a 20 Hz–40 kHz frequency range with 16 ohm impedance. Bluetooth 5.4 with LDAC support is there for higher-resolution wireless transmission, and the rated range is about 10 meters. Battery life is quoted at up to 10 hours per charge and 42 hours total with the case, which recharges wirelessly at 750 mAh. There is also real-time translation across 100 languages through the soundcore app, plus AI-assisted call clarity — niche features, but genuinely useful if you travel or work across languages.
Who should buy it: runners, cyclists, gym-goers, commuters and anyone who needs to hear traffic, announcements or a colleague while music plays. The IP55 rating and "sports/daily use" positioning back that up. Who should skip it: anyone who wants to block out the world. There is no noise control listed, and an open-ear fit fundamentally cannot isolate. If your priority is silence or deep, sealed-in bass, this is not the tool. I would also skip it if you want a wired connection — there is no headphone jack here.
The Hi-X20 is the opposite philosophy. It is a closed-back, over-ear, wired headphone aimed at musicians, engineers and listeners who care about accuracy over convenience. The 44 mm Hi-X (High Excursion) drivers are the core of the design, and the spec sheet lists a 12 Hz–24 kHz frequency range at 25 ohm impedance — a wide band that suggests it can reach deep into the low end while keeping mids and highs balanced. Austrian Audio describes the tuning as low-noise across all frequencies, which is the kind of language you see around monitoring and mixing tools rather than casual listening gear.
Comfort and serviceability are clearly part of the pitch. You get memory foam earpads that are replaceable, folding and swiveling earcups, and metal components for stability — all details that matter if you wear headphones for hours and want them to survive it. The cable is detachable and 3 meters long, with a 3.5 mm jack and a 1/4" adapter included, so it plugs into everything from a laptop to studio gear. A carry bag is in the box, and it ships with a limited 2-year manufacturer warranty. The trade-off is baked in: it is wired, it has no Bluetooth, no battery and no app features. At 400 g it is also a substantial object compared with tiny open-ear buds.
Who should buy it: producers, podcasters, musicians tracking or mixing, students doing long editing sessions, and anyone who wants a dependable wired headphone with replaceable parts. Who should skip it: anyone who wants to move freely, take calls untethered, or wear headphones to the gym. The 3-meter cable makes it a desk and studio companion, not a running partner.
• Best for all-day, on-the-move listening → Anker Soundcore AeroFit 2. Open-ear comfort with no cable and up to 42 hours total with the case.
• Best for studio, mixing and critical listening → Austrian Audio Hi-X20. Closed-back isolation and 44 mm Hi-X drivers tuned for accuracy.
• Best for staying aware of your surroundings → Anker Soundcore AeroFit 2. The open-ear design is the entire point; the Hi-X20's closed cups do the opposite.
• Best for blocking out noise → Austrian Audio Hi-X20. Closed-back cups with sound isolation versus an open fit with no noise control listed.
• Best for calls and travel features → Anker Soundcore AeroFit 2. AI clear calls plus real-time translation across 100 languages.
• Best for durability and repair over time → Austrian Audio Hi-X20. Replaceable memory foam pads, detachable cable and metal components.
• Best for wired, latency-free connection → Austrian Audio Hi-X20. A 3.5 mm jack and 3 m cable with no wireless involved.
• Best for wireless freedom and Hi-Res streaming → Anker Soundcore AeroFit 2. Bluetooth 5.4 with LDAC support and wireless charging.
• Best for long sessions at a desk → Austrian Audio Hi-X20. Memory foam pads and a foldable, swiveling frame built for extended wear.
In my opinion, these are not substitutes — they are two different jobs. If you told me you listen while running, commuting, working out or moving around a house, I would buy the Anker Soundcore AeroFit 2 without hesitation: the open-ear fit, adjustable hooks, 42-hour case life and wireless charging are exactly what that life needs. But if you sit down to actually listen, record, mix or edit, I would buy the Austrian Audio Hi-X20 — its closed-back isolation, 44 mm Hi-X drivers and replaceable, serviceable parts are built for focused work, and a cable is a feature there, not a flaw. Pick the one that matches how you spend your listening hours, and if budget matters, check the current price on Amazon before deciding.
FAQ
No. The Hi-X20 is wired only, using a detachable 3.5 mm cable, with no Bluetooth and no battery. It does not have active noise cancellation, but its closed-back design provides passive sound isolation.
It is not designed for that. The AeroFit 2 is open-ear with Bluetooth and LDAC, positioned for sports and daily use. For precise, cabled monitoring, the Hi-X20's closed-back design and Hi-X drivers are the more suitable tool.
Decide by where you listen. If it is outdoors, at the gym or on the go, get the AeroFit 2. If it is at a desk, in a studio or for focused listening, get the Hi-X20. For the latest pricing on either, check the price on Amazon.
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