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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
• Koss CL/80 — biggest strength: A true large over-ear design with 40 mm dynamic drivers, a 16 Hz–22,000 Hz frequency range, 60 ohm impedance and 101 dB sensitivity, plus a see-through clear body that shows off the internals.
• Koss CL/80 — biggest trade-off: It is wired only and ends in a 3.5 mm jack, so phones and tablets that have dropped the headphone socket will need an adapter.
• AIAUXAI Open Ear USB — biggest strength: A USB-C plug with a built-in mic, inline volume buttons and a wide compatibility list that runs across recent iPhone, Galaxy, iPad and Pixel models.
• AIAUXAI Open Ear USB — biggest trade-off: It is not an over-ear headphone at all — it hooks over the ear and sits open, so it will not seal out noise or deliver the same bass weight as a full-size closed design.
• Who each pick is for: Koss CL/80 for listeners who want a classic wired over-ear headphone at a desk, on a laptop or on a train; AIAUXAI Open Ear USB for phone-first users who want to stay aware of their surroundings while taking calls.
The CL/80 is a genuine large over-ear headphone, and that shape is the whole point. The earcups sit around the ear rather than on it, the plastic enclosure is clear from headband to cord, and the pads are plush leatherette. Because the cups cover the ear instead of resting on it, the design leans on passive sound isolation rather than any electronics — the spec sheet lists noise control simply as "sound isolation." In practice that means the fit does the work: a decent seal on the ear blocks some room noise, and there is no battery, no pairing, no charging case to think about.
The audio side is unusually well documented. A 40 mm dynamic driver, 60 ohm impedance and 101 dB sensitivity tell you this is an easy load that a laptop, a tablet, a handheld console or a phone with an adapter can drive without a headphone amp. The 16 Hz–22,000 Hz range is a wide, full-range figure, and the description points to deep bass, crisp highs and a full midrange — the kind of tuning that suits music, movies and long listening sessions rather than only speech. The 6-foot cord is generous enough to reach from a TV or desktop tower across a desk, and the media control on the remote cable means you do not have to reach for the source.
AIAUXAI Open Ear USB: Who It's For
The AIAUXAI pair solves a completely different problem. It is a USB-C wired headset with an over-ear hook — the driver sits outside your ear canal rather than over it, so your ear stays open. That is the design's selling point: you hear your music or your call, and you still hear the world around you. For cycling, running, walking a busy street or working in an office where people tap you on the shoulder, that awareness is the feature, not a compromise.
The connection is USB Type C, and the compatibility list is long and specific: recent iPhone models from the 15 line onward, a deep bench of Galaxy S, A, Z and Note devices plus Galaxy tablets, iPad Pro, iPad Air, iPad Mini and standard iPad, and Google Pixel from the 2 series up to the 10 series. There is a built-in microphone and inline volume control, which is what turns this from a listening accessory into something you can actually take calls on. The cable is 1.2 m of oxygen-free copper with a reinforced USB-C plug, and it ships with a cable fixer clip so the wire stays put against your clothing instead of swinging while you move. A PU storage case is included for the headset and any adapter you carry.
Who should buy it: phone-and-tablet users who want a wired, no-battery, no-pairing headset with a mic, and anyone who needs to stay situationally aware while listening. Who should skip it: if you want deep bass and real isolation, open-ear hooks will not give it to you — the spec sheet lists noise control as "none," and there is no seal to work with. It also will not plug into a 3.5 mm socket without an adapter, and the 1.2 m cable is shorter than the Koss cord, which matters if you sit far from your source.
Side-by-Side: Which Should You Choose?
• Best for a classic over-ear fit and passive isolation → Koss CL/80. Around-the-ear cups, leatherette pads, sound isolation from the seal.
• Best for modern phones with no headphone jack → AIAUXAI Open Ear USB. Native USB-C, no adapter required.
• Best for wide, full-range music listening → Koss CL/80. 40 mm dynamic drivers, 16 Hz–22,000 Hz, 60 ohm, 101 dB.
• Best for running, cycling and gym awareness → AIAUXAI Open Ear USB. Open-ear hooks, cable fixer clip, 1.2 m tangle-resistant cord and a storage case.
• Best for plugging into older gear → Koss CL/80. The 3.5 mm jack reaches laptops, desktops, tablets and handhelds directly.
• Best for long-term peace of mind → Koss CL/80. The limited lifetime warranty is the stronger coverage of the two.
• Best for travel storage → AIAUXAI Open Ear USB. The included PU case keeps the headset and adapters together.
In my opinion, most people shopping these two are really choosing between "a headphone" and "a headset," and that should decide it before anything else. If you mainly listen to music and want a proper large over-ear feel with real isolation and no battery to manage, I would buy the Koss CL/80 — the 40 mm driver, wide frequency range and easy-to-drive 60 ohm load make it the more satisfying listen, and the lifetime warranty backs it up. If your priority is taking calls on a USB-C phone or tablet and staying aware of what is around you, I would buy the AIAUXAI Open Ear USB instead. Check the current price on Amazon before you commit, since that is the one thing that can still tip a close call.
how long should over ear headphones last
That depends far more on build and care than on any spec. In the case of the Koss CL/80, the manufacturer backs it with a limited lifetime warranty, which is the strongest durability signal in either data sheet. The AIAUXAI Open Ear USB carries a 1 year warranty, and its reinforced USB-C plug and oxygen-free copper cable are the parts that see the most wear.
how long to charge sony over ear headphones
Neither product here is a Sony model, and neither is wireless, so there is nothing to charge in either case. The Koss CL/80 runs from a 3.5 mm wired connection and the AIAUXAI Open Ear USB runs from USB-C — both draw their audio signal over the cable and have no battery listed in their specs.
how long to charge jbl over ear headphones
Same answer: this comparison is between a Koss wired headphone and an AIAUXAI wired USB-C headset, and no battery or charging figure appears for either. If charging time is a deciding factor for you, these two are outside that conversation entirely — you plug in and listen.
how long to charge bose over ear headphones
There is no charging time to give, because neither the Koss CL/80 nor the AIAUXAI Open Ear USB is a battery-powered design. The trade-off you are actually weighing is the Koss's 3.5 mm jack and passive isolation against the AIAUXAI's USB-C plug, open-ear awareness and built-in mic.
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