Audio-Technica ATH-R70x is my pick for open back headphones wired, especially for library listening, thanks to its light build, breathable pads, and open, natural design.
Sennheiser is the runner-up if you want both 6.3 mm and 4.4 mm cable options in the box.
• Audio-Technica ATH-R70x — best for long, focused listening; pick this if you want an approximately 210 g design, breathable fabric earpads, and a detachable cable that preserves stereo orientation.
• Audio Technica ATH-AD900X — best for vocal and instrumental listening; pick this if its 53 mm drivers and 38-ohm impedance suit your wired setup.
• HIFIMAN XS Full-Size Over-Ear — best for a spacious planar-magnetic presentation; pick this if you value a replaceable cable and an adjustable headband.
• Sonova Sennheiser HD 660S2 — best for flexible wired connections; pick this if the included 6.3 mm and 4.4 mm cables match your listening equipment.
The ATH-R70x is my first choice here for listening in a library, where comfort over a long study session matters as much as the open-back design. It is a wired, over-ear reference headphone with acoustically transparent aluminum honeycomb-mesh housings. That construction is intended to support a natural, spacious sound rather than seal the ear inside a closed cup.
Its approximate 210 g weight without the cable, breathable fabric earpads, and wing-style support all point toward extended wear. These details make it a sensible headband headphones for library candidate for someone who wants to settle in with recorded lectures, instrumental music, or other audio while working. Its dynamic drivers use high-efficiency magnets and a pure alloy magnetic circuit, while carbon composite resin is intended to improve structural rigidity and transient detail.
The dual-sided detachable cable has a locking design and keeps left and right signal orientation correct regardless of how the cable is attached. That is a useful practical detail if the cable needs to come off for storage or replacement. The listed frequency range is 5 Hz to 40 kHz, and impedance is 470 ohms, so I would pay close attention to the source equipment: a phone or basic laptop may not be the most suitable match for a high-impedance headphone.
The trade-off is straightforward. Open-back headphones let sound pass through their housings, so they are not the right choice if you need privacy or want to avoid disturbing nearby library users. The high impedance also makes source compatibility an important part of the decision. For quiet, stationary listening with suitable equipment, I find its low weight and comfort-focused design the strongest fit in this group.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-10 · 7 min read · Independent comparison
The ATH-AD900X is a wired open-air headphone aimed at listeners who put vocal and instrumental clarity near the top of their list. Its 53 mm dynamic drivers use rare-earth magnets and copper-clad aluminum-wire voice coils. The product information gives it a 5 Hz to 35 kHz frequency range and 38-ohm impedance, making the impedance figure notably lower than the R70x’s.
For library listening, the low stated impedance may make it a more convenient pairing with common wired sources than the R70x, though a device’s output still matters. The large drivers and open design are intended to create a natural presentation for music and spoken-word material. Its cushioned pads and 3D Wing Support Housing are designed to support the head without relying on a conventional tight-fitting headband feel.
That fit may appeal if you dislike a strong sense of pressure around your ears. It could work well for a study session built around music, or for listening to lecture recordings where clear voices matter.
Its main limitation for a shared study space is the same basic one that comes with the open-back format: it does not provide the isolation of a closed-back headphone. Sound can travel both ways, which can be distracting in a quiet room. The available product details also do not specify a microphone, so this is not a substitute for a headset with a boom mic. If you are searching for “with microphone open ear earbuds for library,” this model does not match that microphone-oriented need based on the listed features.
The HIFIMAN Edition XS takes a different route with planar-magnetic drivers, Stealth Magnet Technology, and a NEO supernano diaphragm. The product information describes the magnet design as reducing interference with sound waves and the thin diaphragm as supporting fast response and detailed imaging. Its listed frequency range is 8 Hz to 50 kHz, with 18-ohm impedance and 92 dB sensitivity.
For someone choosing open back headphones wired for music at a desk, the Edition XS is an option to consider if a broad, spacious presentation and planar-magnetic design are priorities. It has an adjustable headband with memory foam and a replaceable cable that connects through 3.5 mm sockets. Replaceability gives the cable a practical advantage: it can be changed if needed, rather than being treated as a permanent part of the headphone.
At 405 g, however, it is considerably heavier than the ATH-R70x’s listed weight. The headband is designed for comfort, but weight is still worth considering if you plan to wear headphones for several hours while reading or studying. A library setting also brings the familiar open-back compromise: these headphones are intended for listening, not for keeping sound confined to your own ears.
The product description uses “hi-res” language, but a wide frequency-response specification alone does not establish that every source file or playback chain is high resolution. I would treat the driver design and replaceable cable as concrete differentiators, then decide whether the weight and open construction suit your routine. This is a strong fit for a listener who wants planar drivers and a replaceable wired connection, but less compelling if minimal weight is the main priority.
The HD 660S2 is a wired, open-back, over-ear dynamic headphone with 42 mm drivers. Its listed frequency range is 8 Hz to 41.5 kHz, and impedance is 300 ohms. For shoppers comparing cable connections, it comes with both a 6.3 mm cable and a 4.4 mm cable, each listed as 1.8 m, plus a 6.3 mm-to-3.5 mm adapter.
That selection makes it the most flexible option in this group for switching between compatible wired outputs. It may suit a listener who uses more than one audio setup and wants the included cable connections to cover different equipment. Its 300-ohm impedance still deserves attention: check that your source can drive it appropriately, rather than assuming every computer or portable device will deliver the listening level you want.
The Sennheiser is a reasonable library candidate if your priority is a wired listening setup and you can use a suitable source. The open-back design is not sound isolation in the everyday sense, despite the product information’s noise-control field. The construction is over-ear with oval earpieces, and the package includes a carry pouch for storing the headphones between listening sessions.
Its trade-off is that the available specifications provide less detail about comfort features than the Audio-Technica models do. There is no listed weight-specific comfort claim or microphone feature to guide those decisions. I would choose it over the others when its two cable options are especially useful to your equipment, but not as the default for a microphone-equipped setup or a noisy shared space.
How We Picked
We compared published product specifications and features, including driver type, impedance, cable connections, weight where listed, and comfort-related design details.
The order is my independent editorial opinion based on those details and the library use case.
No brand paid for placement.
They can work for quiet, individual listening, but open-back designs do not seal sound in. People nearby may hear some audio, and ambient room noise can remain audible to you. Keep the listening level considerate.
The HIFIMAN Edition XS is listed at 18 ohms, followed by the ATH-AD900X at 38 ohms. The Sennheiser HD 660S2 is listed at 300 ohms, and the ATH-R70x at 470 ohms. These figures are useful when checking source compatibility, but do not alone guarantee a particular listening level.
If you need voice chat or calls, look for a headphone or headset whose specifications explicitly confirm a microphone.
Check the connector or included adapters against your device, and consider the headphone’s impedance and sensitivity. Also think about where you will listen: open-back headphones allow sound to pass through, so they are a poor fit when isolation or privacy is essential.
For a library, I recommend the Audio-Technica ATH-R70x for its approximately 210 g weight, breathable earpads, and open, natural design. Make sure your source can suit its 470-ohm impedance, and remember that its open construction will not keep sound private.
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