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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a single pair of clear, retro-styled wired headphones with a full-size 40mm driver and a 3.5mm plug that works with almost any older audio gear, choose Koss CL/80; if you need twelve USB-C classroom headsets with microphones for a whole group of students, choose Anrgterg 12.
• Koss CL/80 biggest strength: a real hi-fi spec sheet for one listener — 40mm dynamic drivers, 16–22,000 Hz frequency response, 60 ohm impedance, 101 dB sensitivity, and a see-through retro design that stands out.
• Koss CL/80 biggest trade-off: it's one pair, it's wired to a 3.5mm jack only, and there's no microphone listed — plus 60 ohm impedance means a weak phone output won't drive it as loudly as a low-impedance pair.
• Anrgterg 12 biggest strength: twelve complete headsets in one box, each with a USB-C jack, a microphone, and a bendable adjustable frame aimed at kids from kindergarten to middle school.
• Anrgterg 12 biggest trade-off: it's built for classrooms, not for critical listening — no frequency response, impedance, or driver size is published, and a 3.9ft cable is short for anything beyond a desk.
• Who each pick is for: Koss CL/80 is for one adult or teen who wants a lightweight, characterful wired pair for music, movies, and travel; Anrgterg 12 is for a teacher, school, library, or training center equipping a room full of students.
The CL/80 is a nostalgia play that happens to have honest audio numbers behind it. The transparent plastic shell runs from headband to cord, so you can literally see the guts of the thing — and Koss pairs that look with a 40mm dynamic driver covering 16 Hz to 22,000 Hz. That's a wide range on paper, and the spec language points to deep bass, crisp highs and a full midrange rather than a thin, tinny signature. At 101 dB sensitivity it doesn't need a monster amp to get loud, though the 60 ohm impedance is on the higher side for a casual headphone, so a dedicated player or a laptop with a decent output will serve you better than a cheap dongle.
Comfort and portability are the other two pillars here. Plush leatherette cushions sit around the ear for a secure fit, and the padded headband is adjustable and integrated into the frame. At 7.36 ounces it qualifies as ultra-light for a full over-ear design, which is exactly why the description steers it toward travelers, musicians and listeners on the go. The 6-foot cord gives you real slack to move around a desk or a couch, and the 3.5mm plug drops straight into laptops, tablets and gaming devices without any adapter hunting.
Buy it if you want one good-looking wired pair for music, movies and long listening sessions, and you like the idea of gear that shows its own internals. Skip it if you need a microphone for calls and classes — none is listed — if you're shopping for a whole classroom rather than one person, or if every device you own has moved to USB-C. Also skip it if you expect Bluetooth; despite some confusing marketing language floating around this model, the CL/80 is a wired 3.5mm headphone. The limited lifetime warranty is a meaningful long-term signal for a plastic-frame headphone. If price matters to you, check the current price on Amazon before deciding.
The Anrgterg 12 is not really a headphone — it's a deployment. You get twelve over-ear headsets in one box, model TPC-12, each with a direct USB Type-C jack and no adapter required. That single detail is the whole pitch for modern classrooms: Chromebooks, iPads, tablets, laptops and USB-C smartphones all connect straight in, so a teacher isn't handing out dongles or troubleshooting conversions at the start of a lesson. Each unit carries a microphone, which is the difference between "students can listen" and "students can actually participate" in online courses, language labs and remote testing.
The physical design is aimed squarely at kids. The frame is flexible plastic that bends rather than snaps, and the adjustable headband is sized to fit students from kindergarten through middle school. At only 80g per headset, these won't drag on small ears during a long session. The 3.9ft cable is deliberately short — enough to move at a desk, not enough to wander the room — and the surface is described as easy to clean, which matters in shared environments where twelve different kids touch the same gear every day. Anrgterg also positions these beyond the classroom: hospitals, hotels, museums, gyms and exam centers all show up as intended settings.
Buy them if you're outfitting a group and need a bulk, USB-C-native, microphone-equipped solution with a two-year warranty and a bendable frame that survives daily kid handling. Skip them if you're one person who wants the best possible sound for music — no driver size, frequency response or impedance is published here, and the emphasis is clearly on durability, compatibility and cost-per-unit rather than audio fidelity. Skip them too if your devices are still on 3.5mm, because there's no adapter in the box and no analog jack on the headset.
• Best for published audio specs and hi-fi listening → Koss CL/80. 40mm drivers, 16–22,000 Hz, 60 ohm, 101 dB — actual numbers you can reason about.
• Best for equipping a group → Anrgterg 12. Twelve headsets in one purchase, each with a microphone.
• Best for USB-C devices → Anrgterg 12. Direct Type-C jack, no adapter, works with Chromebooks and tablets out of the box.
• Best for older gear and gaming handhelds → Koss CL/80. The 3.5mm plug fits laptops, tablets and gaming devices without a converter.
• Best for kids' durability → Anrgterg 12. Bendable frame, adjustable headband sized from kindergarten to middle school, easy-clean surface, two-year warranty.
• Best for one person who wants a distinctive look → Koss CL/80. The fully transparent shell is the entire personality of this headphone.
• Best for long listening comfort in one spot → Koss CL/80. Plush leatherette cushions, padded adjustable headband, 6-foot cord, 7.36 ounces.
• Best for classroom and testing scenarios → Anrgterg 12. Designed for group learning, exams, libraries and training institutions.
For a single buyer who wants one pair of large over-ear headphones for music, movies and everyday wired listening, I'd buy the Koss CL/80. In my opinion the published driver size, frequency range and sensitivity make it the only one of the two you can actually evaluate as a headphone rather than as a supply order, and the transparent retro build plus the limited lifetime warranty give it a longer, more personal life. The Anrgterg 12 wins outright the moment your goal is twelve students, twelve microphones and twelve USB-C connections — but that's a different job entirely. Pick the Koss for yourself; pick the Anrgterg for the room.
how long should over ear headphones last
It depends on build quality and how hard they're used. The Koss CL/80 carries a limited lifetime warranty, which signals confidence in the frame and drivers for normal personal use. The Anrgterg 12 carries a two-year warranty and is explicitly built for daily handling by children, so it's designed around classroom wear rather than decades of ownership.
how long to charge jbl over ear headphones
That question doesn't apply to either headphone here, because both the Koss CL/80 and the Anrgterg 12 are wired models with no battery and no charging at all. The CL/80 runs from a 3.5mm jack and the Anrgterg 12 runs from USB-C for audio, not for power. There's nothing to plug into a charger.
how long to charge bose over ear headphones
Same answer: neither of these products has a battery, so there's no charge time to compare. If you specifically want a wireless, rechargeable over-ear headphone, you're looking at a different category than the two wired options compared here. For these, power comes entirely from the device they're plugged into.
Yes. Each headset has a direct USB Type-C jack, so it plugs straight into Chromebooks, iPads, tablets, laptops and USB-C smartphones with no adapter needed. That's the main practical advantage over the Koss CL/80, which uses a 3.5mm plug and won't fit USB-C-only devices without a converter.
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