How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want serious, wired studio-grade monitoring for tracking, mixing and focused listening, choose Audio-Technica ATH-M20x; if you need a value five-pack of comfy, durable on-ear headphones for a classroom, a family or a group of students, choose Sonitum Kids Headphones Bulk. These two products look similar on paper — both wired, both closed-back-ish over/on-ear designs with a 3.5mm jack — but they solve completely different problems, and picking the wrong one is an easy mistake to make.
• Audio-Technica ATH-M20x — biggest strength: 40 mm dynamic drivers with rare earth magnets and copper-clad aluminum voice coils, tuned for enhanced low-frequency response, plus a circumaural (around-the-ear) design for strong sound isolation.
• Audio-Technica ATH-M20x — biggest trade-off: It is a single pair of wired over-ear headphones with a long 3.0 m straight cable and a single side exit — great at a desk, awkward for tucking into a school bag.
• Sonitum Kids Headphones Bulk — biggest strength: You get five on-ear headphones in one set, in multiple colors, with a lightweight adjustable headband, soft ear cushions and swivel ear cups for stacking and storage.
• Sonitum Kids Headphones Bulk — biggest trade-off: The audio design is simpler — a 32 ohm dynamic driver with no stated frequency response range — so it is built for clear everyday listening, not critical monitoring.
• Who should buy which: Buy the ATH-M20x for one careful listener doing studio-style work; buy the Sonitum five-pack if you need several pairs at once for kids, students or a shared space.
The ATH-M20x is a purpose-built monitoring headphone. The spec sheet reads like studio equipment: 40 mm dynamic drivers with rare earth magnets and copper-clad aluminum wire voice coils, a frequency range of 15 – 20,000 Hz, 47 ohm impedance, 96 dB sensitivity and a maximum input power of 700 mW at 1 kHz. In plain terms, that is a headphone designed to take a clean signal, reproduce low frequencies with some emphasis, and stay composed while you work. If you record, mix, edit audio or game with an ear on footsteps and small details, this is the kind of tuning that matters.
The physical design is just as telling. The circumaural shape contours around the ears rather than pressing on them, which is the main reason the isolation is described as strong in loud environments with minimal bleed. That cuts both ways: it is genuinely useful when you are tracking near a noisy computer or a bandmate, but it also means the headphone sits bigger on your head. Weight is listed at 210 g without the cable and connector, and the build uses professional-grade ear pad and headphone material so it can survive extended wear sessions. A single-side cable exit keeps the wire out of your way, and the included 6.3 mm snap-on adapter lets you plug into proper audio gear, not just a phone or laptop.
Who should buy it: someone who wants one dependable wired headphone for focused listening, monitoring, mixing, podcast editing or gaming, and who values isolation and low-end presence over portability. Who should skip it: anyone shopping for several people at once, anyone who needs something light and packable for young kids, and anyone who wants a short cable for on-the-go use — the 3.0 m straight cable is a desk-length cable, not a pocket one. It is also an adult-oriented product, with an age range listed as Adult. In my opinion, it is the pick when sound quality and isolation are the whole point.
The Sonitum set is a completely different animal. You are buying five on-ear headphones in one package, in assorted colors, and the design brief is clearly "shared use, repeated use, kids and students." The headband is lightweight and adjustable, the ear cushions are soft for extended wear, and the construction is described as bendable with reinforced materials and a thick, long-lasting cable. Swivel ear cups let you stack and store them flat, which matters a lot if you are managing a drawer full of them in a classroom, a library or a computer lab.
Audio-wise, the Sonitum is a 32 ohm dynamic driver with a sound-isolation design and media controls built into the cable. There is no stated frequency response range in the data, so I would not frame this as a monitoring headphone — it is tuned to deliver clear, high-quality audio for the everyday stuff: online learning, remote classes, movies, music and travel. The 3.5 mm jack connects to standard smart devices, which is exactly the plug you find on school tablets, laptops and airplane seat entertainment. The intent here is versatility and durability across many hands, not reference-grade accuracy for one pair of ears.
Who should buy it: parents buying for multiple kids, teachers and school staff equipping a classroom or lab, and anyone who needs a stack of spares for travel, a library, a museum or a group activity. Who should skip it: a single adult who wants one serious headphone for mixing or critical listening — five average pairs will never beat one purpose-built monitoring pair for that job. Note the set is listed with an age range of Adult, Kid, and it carries a 1 year limited warranty, so it is positioned as an everyday-use product rather than a piece of studio gear.
• Best for audio fidelity and low-end presence → Audio-Technica ATH-M20x. 40 mm drivers, rare earth magnets and tuning aimed at enhanced low frequency performance beat a simple 32 ohm everyday driver for critical listening.
• Best for sound isolation in loud rooms → Audio-Technica ATH-M20x. The circumaural design contours around the ears and is built for strong isolation with minimal bleed.
• Best for equipping a group → Sonitum Kids Headphones Bulk. Five pairs in one set, in multiple colors, is the whole point.
• Best for kids and students → Sonitum Kids Headphones Bulk. Lightweight adjustable headband, soft cushions, bendable reinforced construction and a thick cable are all aimed at frequent use by children.
• Best for storage and shared spaces → Sonitum Kids Headphones Bulk. Swivel ear cups stack flat, which is ideal for a classroom drawer, a lab cart or a travel bag.
• Best for plugging into pro audio gear → Audio-Technica ATH-M20x. The included 6.3 mm snap-on adapter lets it connect to interfaces and mixers, not just a 3.5 mm jack.
• Best for travel and airplane use → Sonitum Kids Headphones Bulk. The 3.5 mm jack, on-ear fit and packable swivel design suit seat-back entertainment and remote learning far better than a 3.0 m studio cable.
• Best for one long, focused session → Audio-Technica ATH-M20x. 210 g with professional-grade padding is built for extended wear at a desk.
If I had to choose one, I would buy the Audio-Technica ATH-M20x for myself. The driver design, the 15 – 20,000 Hz range, the circumaural isolation and the 6.3 mm adapter make it a genuinely capable wired headphone for mixing, monitoring, editing and gaming — and that is the kind of listening I actually do. The Sonitum five-pack is the smarter buy only when the job is "headphones for many people," like a classroom, a family or a group of students. Different jobs, different picks. If price matters to you, check the current price on Amazon before deciding — the numbers move, and I will not guess at them.
how to headphones work
A wired headphone like either of these takes an analog signal from your device through the 3.5 mm jack and drives a dynamic driver inside each ear cup, which moves air and produces sound. The ATH-M20x uses 40 mm drivers with rare earth magnets and copper-clad aluminum voice coils; the Sonitum uses a 32 ohm dynamic driver. Bigger, better-tuned drivers generally mean more control and stronger low-end, which is why the ATH-M20x is the more audio-focused of the two.
how to headphones on iphone
Both are wired headphones with a standard 3.5 mm jack, so they connect to anything with a 3.5 mm output. If your iPhone has no headphone jack, you need a 3.5 mm adapter to Lightning or USB-C — that is true for both the ATH-M20x and the Sonitum set. The ATH-M20x also ships with a 6.3 mm snap-on adapter for larger audio gear, which the Sonitum does not include.
how to headphones
Start by matching the headphone to the job. For one person doing mixing, monitoring or gaming, go with the ATH-M20x and its circumaural isolation and enhanced low-frequency tuning. For several kids, students or shared devices, go with the Sonitum five-pack and its adjustable headband, soft cushions and swivel ear cups. Then plug into the 3.5 mm jack, adjust the headband, and use the cable controls where available.
how to headphones noise cancelling
Neither of these is an active noise-cancelling headphone — both rely on passive sound isolation instead. The ATH-M20x leans on its circumaural, around-the-ear fit for strong isolation in loud environments, while the Sonitum uses an on-ear design with sound isolation. If you specifically need active noise cancellation, look for a headphone that lists that feature; it is not part of either spec sheet here.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Mackie CR3.5 vs Audio-Technica ATH-M20x: Studio Monitor, FosPower Kids Headphones vs Asobilor USB-C Audio Cable, audio Technica ATH-G1 vs EarFun Air Pro 4: APTX Adaptive