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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-01 · 7 min read · Independent comparison
• Bulktech 10 — biggest strength: You get ten pairs in one box, each with a 3.5mm jack, a 5-foot cable, and in-line volume control, so a group can all listen at once.
• Bulktech 10 — biggest trade-off: It is a bulk utility set, not a hi-fi product. Noise control is none, the frequency range tops out at 100 Hz per the sheet, and the connector is 3.5mm only.
• Audio-Technica ATH-S120C-BK — biggest strength: A single, lightweight (111 g) on-ear pair with a USB-C connector, an in-line mic, full media and call controls, and flat-folding housings.
• Audio-Technica ATH-S120C-BK — biggest trade-off: USB-C only. No 3.5mm jack means older phones, many school Chromebooks, and airplane seat jacks are out unless you have an adapter.
• Who Bulktech 10 is for: Teachers, schools, libraries, clinics, and families who need many cheap, durable wired pairs that share one standard plug.
• Who Audio-Technica ATH-S120C-BK is for: One person who wants a comfortable everyday on-ear headset for USB-C devices and takes calls on it.
The Bulktech 10 is a ten-pack of wired on-ear headphones, and that single fact drives everything. Each pair uses a 3.5mm jack, so it plugs into tablets, phones, PCs, Chromebooks, and other smart devices without any dongle or pairing step. The cable is 5 feet long, which is enough slack for a desk, a tray table, or a student seated at a shared cart. There is in-line remote control for volume, but no microphone, so these are for listening, not for talking.
The build is aimed at shared and repeated use rather than audiophile listening. You get soft ear cushions, a lightweight adjustable frame, and swivel cups that let the headphones stack flat for storage. The sheet lists a 32-ohm impedance, a dynamic driver, and a frequency range of 20-100. The materials are described as extra durable with a thick wire, which matters because kids are hard on cables. Bulktech also ships these in mixed colorful tones instead of plain black, which is a small thing that helps in a room full of identical headsets.
Who should buy it? Anyone outfitting a group: classrooms, kindergartens, computer labs, libraries, museums, art galleries, health centers, and airline or travel programs. It is also a sensible pick for a family with several kids doing remote learning, online studying, or movie nights. Who should skip it? If you want one pair for yourself, care about music detail, or need to take calls, the ten-pack is overkill for you. There is no noise control or mic, and the frequency range is narrow, so this is a practical listening tool, not a music-first headphone.
The Audio-Technica ATH-S120C-BK is the opposite approach: one pair, built properly, for one person. It is a wired on-ear headphone that connects over USB-C, which is the port on most current phones, tablets, and laptops. The sheet lists a 35-ohm impedance, a 20 Hz to 20,000 Hz frequency range, 103 dB sensitivity, and a dynamic driver. That is a full-range spec sheet, and it tells you this pair is meant for music, podcasts, and movies rather than announcements in a classroom.
Comfort and convenience are the design story here. At 111 grams it is light, and the compact frame is meant to stay comfortable over long sessions. The housings fold flat, so it disappears into a bag pocket. The in-line mic and controls cover play/pause, track skipping, volume, and answering or ending calls, all without touching your device. It is compatible with iOS and Android, ships in black, and carries a 2-year warranty. There is no active noise control, so isolation comes from the on-ear fit itself.
Who should buy it? A commuter, student, or remote worker who listens on a USB-C phone, tablet, or laptop and wants one cable that handles both audio and calls. Who should skip it? If your devices still use a 3.5mm jack, or you need to plug into a shared school laptop or an airplane seat, this is the wrong connector. It is also a single pair, so it solves nothing for a group.
• Best for buying in bulk → Bulktech 10. Ten pairs, one box, all with the same 3.5mm plug.
• Best for device compatibility with older gear → Bulktech 10. The 3.5mm jack is the most universal audio connector around; the ATH-S120C is USB-C only.
• Best for calls and video meetings → Audio-Technica ATH-S120C-BK. It has an in-line mic plus answer/end call controls; the Bulktech set has volume control but no mic.
• Best for full-range music listening → Audio-Technica ATH-S120C-BK. Its 20 Hz-20,000 Hz range covers the whole audible spectrum on paper; the Bulktech sheet lists 20-100.
• Best for long listening sessions → Audio-Technica ATH-S120C-BK. At 111 g it is the lighter, more compact option, and both brands use soft on-ear cushions.
• Best for storage in tight spaces → Audio-Technica ATH-S120C-BK. The housings fold flat; the Bulktech pairs use swivel cups so they stack rather than fold.
• Best for kids and shared rooms → Bulktech 10. Thick cable, durable materials, colorful shells, and ten pairs means one loss is not a crisis.
• Best for travel and packing light → Audio-Technica ATH-S120C-BK. One folded pair beats a stack of ten in a carry-on.
In my opinion, most people reading this should buy the Audio-Technica ATH-S120C-BK. If you are shopping for yourself and your phone or laptop uses USB-C, it gives you full-range sound, a mic for calls, in-line controls, a light 111-gram frame, flat-folding storage, and a 2-year warranty — a complete everyday headphone in one purchase. I would only steer you to the Bulktech 10 if your goal is equipping a group. For a classroom, library, clinic, or a household with several kids, ten durable 3.5mm pairs with long cables and volume control is the more useful buy, even though each individual pair is the more basic headphone. One buyer, one pair: Audio-Technica. Many listeners, one standard plug: Bulktech.
how to clean on ear headphones
Wipe the ear cushions and headband with a soft, slightly damp cloth, and use a mild soap on stubborn spots rather than soaking them. On the Bulktech 10 the leather cushions and swivel cups make it easy to reach the pads; on the ATH-S120C-BK keep moisture away from the in-line remote and the USB-C plug. Never submerge either pair in water.
how to fit on ear headphones
On-ear models rest on the outside of your ear rather than around it. Slide the headband out until the cushions sit flat against your ears without pressing hard, and adjust each side evenly. The Bulktech 10 has an adjustable frame sized for both adults and children; the ATH-S120C-BK is a compact, lightweight design that you simply unfold and settle into place.
how to ear headphones
If you mean how to wear them correctly, the key is the L and R markings: left cup on the left ear, right on the right, with the cable hanging down on your dominant side so the in-line controls are easy to reach. Both the Bulktech 10 and the ATH-S120C-BK use in-line controls, so getting the cable orientation right is what makes volume and call buttons usable.
how to open ear headphones
If your headphones fold, "opening" them means unfolding the housings back to their listening position. The Audio-Technica ATH-S120C-BK folds flat for storage, so you unfold the cups before wearing. The Bulktech 10 uses swivel cups instead, so you rotate each cup back into place and adjust the headband. Do it gently — the joints are the part that wears out first.
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