How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wired, retro-styled on-ear headphone that works with almost anything you already own, choose Koss CL/20i; if you need a wireless over-ear gaming headset with a boom mic, RGB and a long battery, choose AULA G7. These two live in completely different worlds, and that is exactly why the choice is easy once you know how you listen.
• Koss CL/20i biggest strength: a transparent, retro on-ear design with a 3.5 mm wired jack, in-line mic and remote, and plush leatherette cushions — plug-and-play on phones, tablets, laptops, gaming devices and computers.
• Koss CL/20i biggest trade-off: it is wired only, with sound isolation rather than active noise cancellation, and an on-ear fit instead of full over-ear coverage.
• AULA G7 biggest strength: a 40 mm dynamic driver over-ear gaming headset with 2.4G wireless, Bluetooth 5.3 and wired Type-C, a detachable boom mic, RGB, active noise cancellation and a 65-hour battery.
• AULA G7 biggest trade-off: it is bulkier and more setup-dependent — you are managing a dongle or Bluetooth pairing, a charging routine, and a headset built around gaming rather than pocketable everyday listening.
• Who Koss CL/20i is for: commuters, students and casual listeners who want a light, wired, no-battery pair for calls and music on the go.
• Who AULA G7 is for: PC, PS5, PS4 and Switch players who want wireless freedom, a real boom mic for voice chat, and battery life measured in days.
The Koss CL/20i is a deliberately simple product, and that is its whole appeal. It is a wired on-ear headphone with a 3.5 mm jack, so there is no pairing, no charging, no app, no firmware. You plug it into a smartphone, tablet, laptop, gaming device or computer and it works. The clear transparent housing runs from headband to cord, which gives it that unmistakable 90s retro look — this is a headphone people notice, not one that hides in a bag.
On the audio side, the spec sheet lists a dynamic driver with a 30–20,000 Hz frequency range, 60 ohm impedance, 103 dB sensitivity and sound isolation rather than active noise cancellation. The 60 ohm impedance is worth pausing on: it is higher than many everyday earbuds, which means it will still get loud on a phone but tends to sound a little happier with a bit more output behind it. The 103 dB sensitivity keeps it easy to drive in practice. Around your ears, you get plush leatherette cushions and an adjustable headband, and the whole thing weighs about 0.17 kg — genuinely light for something you might wear for a couple of hours.
Controls are handled in-line: a OneTouch mic and remote for answering and ending calls and for pause, play and skipping tracks. That makes the CL/20i a solid pick for anyone who takes calls on the move or wants to keep a phone in a pocket instead of in hand. Koss backs it with a limited lifetime warranty, which is a meaningful signal for a wired headphone whose main failure point is usually the cable.
Who should buy it? Commuters, students, office workers on video calls, and anyone who is tired of charging yet another device. Who should skip it? If you want active noise cancellation to silence a plane cabin, if you hate cables, or if you need a boom mic that sits right at your mouth for competitive voice chat, this is not the tool. Also skip it if you want full over-ear coverage — the on-ear fit rests against your ears rather than around them.
The AULA G7 is built for a different job entirely. It is an over-ear gaming headset with a 40 mm dynamic driver, and it connects three ways: 2.4G wireless, Bluetooth 5.3, and wired Type-C. There is also a 3.5 mm jack in the mix, with wired mode noted for Xbox. In practice that means you can run it on a PC or PS5 over a low-latency 2.4G dongle, pair it over Bluetooth with a phone or tablet, and fall back to a cable when you want zero wireless considerations.
The headline numbers are the ones a gamer actually feels. Battery life is listed at 65 hours, with a 65-hour charge time figure alongside it, so the charging routine is something you think about roughly once a week rather than every night. Latency is quoted at 10 ms on the 2.4G connection, which is the difference between a headset that feels responsive in a firefight and one that feels like it is thinking about it. And 7.1 surround sound is part of the package, which is the feature that helps you place footsteps and directionality rather than just hear "noise from the left."
Around the head you get faux leather over-ear cushions, which seal around the ear instead of pressing on it — usually the more comfortable option for long sessions. The microphone is a detachable boom, so you can pull it off for music and solo play and clip it on for team chat. There is RGB lighting, active noise cancellation, and push-button controls on the headset itself. The box includes an adapter, cable, the detachable boom mic, a headband and a user manual. AULA covers it with a 1-year warranty.
Who should buy it? PC, PS5, PS4 and Switch players who want one headset for game audio and voice chat, plus wireless convenience for everything else. Who should skip it? If you want something light and pocketable for a commute, or you refuse to think about battery levels, the G7 is overkill and bulkier than you want. And if you mainly listen on an older phone with no dongle-friendly setup, the wired simplicity of the Koss is easier.
• Best for plug-and-play simplicity → Koss CL/20i. No pairing, no charging, one 3.5 mm jack, works across phones, tablets, laptops, gaming devices and computers.
• Best for gaming and voice chat → AULA G7. A detachable boom mic, 7.1 surround sound and a 40 mm driver make it the one built for team play.
• Best for battery life → AULA G7. The 65-hour battery figure is the entire point of a wireless headset, and it is enormous.
• Best for retro style and portability → Koss CL/20i. The clear transparent housing and roughly 0.17 kg weight make it the pair you toss in a bag without a second thought.
• Best for noise control → AULA G7. It lists active noise cancellation, while the Koss relies on passive sound isolation only.
• Best for long-session comfort → AULA G7 for most people. Over-ear faux leather cushions spread pressure around the ear, whereas the Koss is an on-ear design with leatherette cushions that rest against it.
• Best for low-latency wireless → AULA G7. The 10 ms latency on 2.4G is the spec that matters when reaction time counts.
• Best for worry-free ownership → Koss CL/20i. A limited lifetime warranty on a wired headphone with no battery to degrade is the lower-maintenance long game.
In my opinion, I would buy the AULA G7 if gaming, voice chat and wireless freedom are what I actually do every day — the 65-hour battery, detachable boom mic, 7.1 surround and 10 ms latency cover the whole job in one product. I would buy the Koss CL/20i if I wanted one light, wired, retro-looking pair for calls and music that never needs charging and never asks me to pair it. Neither is "better" in a vacuum; they solve different problems. Pick the one that matches the way you actually listen, and check the current price on Amazon before you commit.
how to headphones work
Headphones convert an electrical audio signal into sound using a driver — both of these use a dynamic driver. The Koss CL/20i runs a 30–20,000 Hz range at 60 ohm impedance and 103 dB sensitivity; the AULA G7 uses a larger 40 mm driver at 32 ohm with 7.1 surround processing for positional audio in games.
how to headphones on iphone
The Koss CL/20i is the straightforward answer: it has a 3.5 mm jack, so it connects to anything with that port, and its in-line mic and remote handle calls and playback. The AULA G7 is wireless, so it connects over Bluetooth 5.3 instead — no cable needed, but you do pair it first.
how to headphones noise cancelling
The AULA G7 lists active noise cancellation, which uses powered electronics to reduce ambient sound. The Koss CL/20i lists sound isolation instead, meaning it only blocks noise passively through its leatherette cushions and fit — no electronics involved.
how to headphones
Decide by connection and use case. The Koss CL/20i is wired, on-ear, about 0.17 kg, and backed by a limited lifetime warranty — ideal for calls and everyday listening. The AULA G7 is over-ear, offers 2.4G, Bluetooth 5.3 and wired Type-C, adds a detachable boom mic, RGB and a 65-hour battery, and carries a 1-year warranty.
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: Earbay Headphones vs Pupabiflor Bone Conduction Headphones, Jabees HearLink 3-in-1 vs Xoruezls 198, FIMITECH Headset vs tiloqua Earbuds: Bluetooth Headphones, AMORNO Neckband Headphones vs Gvyugke Gaming Headset