How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a featherweight, corded on-ear headphone that works with anything that still has a 3.5 mm jack, choose Koss KPH7; if you need a USB-C in-ear headset with a microphone for calls and a modern port, choose SoFunMoky USB C Headphones.
These two products barely compete in the same arena. One is a classic over-the-head design built around a retractable 3.5 mm cable. The other is a metal in-ear headset that plugs into USB-C and is made for talking as much as listening. The right answer comes down to one question: what port is on the device you actually use?
• Koss KPH7 biggest strength: An ultra-light over-the-head design with a retractable 3.5 mm cable, dynamic drivers, 32 ohm impedance and a lifetime warranty.
• Koss KPH7 biggest trade-off: Wired 3.5 mm only, no microphone, no inline volume buttons, no noise control, and a frequency range that stops at 18 kHz.
• SoFunMoky USB C Headphones biggest strength: USB-C connectivity with an inline microphone and button controls, a 10 mm dynamic driver, a dedicated DAC chip and a 16 ohm impedance that's easy to drive.
• SoFunMoky USB C Headphones biggest trade-off: It needs a USB-C port (or the right adapter), and its sound isolation is passive, in-ear only.
• Who Koss KPH7 is for: Anyone with a 3.5 mm jack who wants lightweight, hassle-free listening.
• Who SoFunMoky USB C Headphones is for: Anyone on a USB-C phone, tablet or laptop who wants to make calls and listen on the same cord.
The KPH7 is the definition of simplicity. It's an on-ear, over-the-head headphone with a 3.5 mm jack and a retractable cable built into the design. That one detail matters more than it sounds. You pull out just the length you need, and it snaps back when you're done — no tangled coil in your bag at the end of the day.
On the audio side, Koss fits dynamic drivers tuned to an 80 Hz – 18,000 Hz range with 32 ohm impedance. That impedance is friendly to almost anything: a laptop headphone output, a school desktop, a library listening station, a cheap MP3 player, even an airplane seat jack. It's a wired connection, so there's no pairing, no battery, no charging ritual. You plug in and you're listening.
The design brief here is clearly institutional and everyday. The description points at learning labs, schools and libraries, and that tells you a lot about the intent: durable, lightweight, comfortable for long stretches, and simple enough that anyone can use it without instructions. No microphone, no volume remote, no noise cancellation. Just headphones.
Buy the KPH7 if you already own devices with a 3.5 mm output, you want something that weighs almost nothing on your head, and you'd rather not think about charging. Skip it if your phone has dropped the headphone jack, if you need to take calls, or if you want any kind of button control on the cord.
The SoFunMoky set is a different animal entirely. It's a metal-bodied, in-ear USB-C headset with 10 mm dynamic drivers, 16 ohm impedance, 100 dB sensitivity and a claimed 0.01 ms audio latency. Low impedance plus high sensitivity means it's built to be driven easily straight from a phone or laptop port — no amp, no dongle gymnastics.
The feature list is dense and practical. There's an inline microphone for calls, button controls, and a DAC chip that handles digital input and converts it so the headset can produce what the brand describes as high-fidelity, lossless-style sound. The cable is composite rubber, designed not to tangle. And the fit is the point: an in-ear, ergonomic shape with two extra silicone tips in small and large so you can size it properly. The brand calls it sound isolation rather than active noise cancellation, which is the honest way to put it — a good seal blocks outside noise, and nothing more.
Compatibility is where this one earns its keep. The listing covers a long list of USB-C phones and tablets, plus MacBook Pro and other USB-C laptops. If your phone is a recent USB-C model, this plugs straight in.
One quirk worth knowing before you buy: the brand notes that if you get no sound on a mobile device, you may need to go into Settings → Developer Options and turn off "Disable USB audio routing." That's a real setup step, not a defect, and it's the kind of thing that trips people up if they don't read the fine print.
Buy the SoFunMoky headset if your daily driver is a USB-C phone, tablet or laptop, you take calls on the go, and you want a sealed in-ear fit for commuting or noisy rooms. Skip it if you're still on 3.5 mm hardware, if you dislike things in your ears for hours, or if you want the open, airy feel of an on-ear design.
• Best for modern phones with no headphone jack → SoFunMoky USB C Headphones. It's USB-C native across a long list of current phones, tablets and laptops.
• Best for old-school 3.5 mm gear → Koss KPH7. Laptops, desktops, library stations, older players — it plugs into all of them.
• Best for calls and video meetings → SoFunMoky USB C Headphones. It has an inline microphone and button controls; the KPH7 has neither.
• Best for all-day comfort with nothing inside your ear canal → Koss KPH7. On-ear, over-the-head, ultra-light, and no silicone tips to fiddle with.
• Best for blocking out background noise → SoFunMoky USB C Headphones. Its in-ear seal provides passive sound isolation; the KPH7 has no noise control at all.
• Best for low-frequency reach on paper → SoFunMoky USB C Headphones. Its stated response runs to 20 kHz versus the KPH7's 18 kHz, and its 10 mm driver is a larger-diameter spec than the KPH7's unspecified driver.
• Best for easy driveability from weak outputs → tie, with a lean to SoFunMoky. At 16 ohm and 100 dB sensitivity it's genuinely easy to power; the KPH7's 32 ohm is still undemanding.
• Best for long-term peace of mind → Koss KPH7. It carries a lifetime warranty; the SoFunMoky carries a one-year warranty plus a replacement offer if you hit an issue.
In my opinion, the deciding factor isn't sound — it's your port. If your phone, tablet or laptop is USB-C, I'd buy the SoFunMoky USB C Headphones. You get the microphone, the button controls, the DAC chip and a sealed in-ear fit, all from the cable you already carry. If you're on 3.5 mm hardware, or you want something light and open that never needs a setting changed, I'd buy the Koss KPH7. It does less, but it does it without friction — and that lifetime warranty is hard to argue with for a headphone this simple. Check the current price on Amazon for whichever one matches your port before you commit.
FAQ
No. The KPH7 has no microphone and no inline volume control. Its only control is a media control on the wired 3.5 mm connection. If you need to make calls, the SoFunMoky headset is the one with a built-in mic.
If your phone has a USB-C port and appears among the many models listed — recent iPhone, Samsung Galaxy, Pixel, OnePlus and others — yes. If you get no sound, disable "USB audio routing" in Developer Options.
The KPH7 sits on your ears rather than inside them, so nothing presses into the ear canal. The SoFunMoky is in-ear with two extra tip sizes for a custom seal. In my view, the KPH7 wins for marathon sessions; the SoFunMoky wins for grip and isolation.
The KPH7 uses a standard 3.5 mm jack, so it works directly with any 3.5 mm output. The SoFunMoky uses USB-C, so it works directly with USB-C devices — no adapter needed on those, but it won't fit a 3.5 mm port without one.
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.