We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 7 min read · Independent comparison
If you want one pocket-sized dongle that turns both an iPhone Lightning port and a USB-C port into a 3.5mm headphone jack, choose KETAKY Plus USB C; if you need a replacement listening cable for a pair of Sennheiser Momentum (or similar) headphones, choose Gneinour Momentum Cable Compatible.
These two products look like they belong in the same conversation because both end in USB-C. They don't. One is an audio adapter that lets you plug wired headphones into a phone or laptop that has no headphone jack. The other is a headphone cable that connects a specific family of Sennheiser headphones to a USB-C source. Read that sentence twice, because it decides everything below.
• KETAKY Plus USB C — biggest strength: a 2-in-1 design that covers Lightning (iPhone) and USB-C devices in a single unit, with onboard DAC decoding up to 24-bit/96kHz and MFi certification.
• KETAKY Plus USB C — biggest trade-off: the Lightning side is plug-and-play only; playback controls, volume and track skipping work on the USB-C side, not the Lightning side.
• Gneinour Momentum Cable Compatible — biggest strength: a purpose-built 2.5mm-to-USB-C cable for Sennheiser Momentum/HD/PXC/ACCENTUM headphones, built with oxygen-free copper, multi-layer shielding, gold-plated connectors and a braided nylon jacket.
• Gneinour Momentum Cable Compatible — biggest trade-off: it only makes sense if you already own a compatible headphone with a 2.5mm input. It is not a dongle and won't help a phone with no jack.
• Who each pick is for: KETAKY Plus for anyone bouncing between an iPhone and an Android/tablet/laptop who wants wired audio; Gneinour for a Momentum, HD 400S/450BT, PXC 550 or ACCENTUM owner who wants a durable USB-C listening cable.
KETAKY Plus USB C is an adapter, and its whole pitch is that you stop carrying two. One end gives you a Lightning-to-3.5mm connection for iPhones; the other gives you USB-C-to-3.5mm for Galaxy phones, Pixel devices, iPads, MacBooks and USB-C laptops. It's rated to decode up to 24-bit/96kHz through an onboard DAC, and it's MFi-certified, which is the part that matters if you've ever plugged a cheap dongle into an iPhone and been greeted with an "Accessory Not Supported" message.
Buy it if you split your time between an iPhone and a USB-C device and want one small adapter in your bag instead of two. It's the kind of thing that earns its place on a commute, in a gym bag, or on a flight where you'd rather use your own wired headphones than whatever the airline hands out. Skip it if you only ever use Lightning, because you're paying for a USB-C side you'll never touch — or if you need inline controls specifically on the iPhone side.
Gneinour Momentum Cable Compatible: Who It's For
Gneinour Momentum Cable Compatible is a 2.5mm-to-USB-C headphone cable, and it's aimed at a much narrower crowd: people who own Sennheiser Momentum 4, Momentum 3, Momentum 2.0, HD1 On-Ear, HD 400S, HD 450BT, PXC 550, PXC 550-II or ACCENTUM Plus headphones. The 2.5mm end goes into the headphone; the USB-C end goes into an iPhone 15/16/17, a Galaxy, a Pixel, an iPad, a MacBook, a Dell XPS, an HP Spectre x360, a Lenovo ThinkBook, a Surface Laptop or a Chromebook. It's a wired-listening cable for modern USB-C gear.
The build is the story here. Oxygen-free copper conductors with multi-layer shielding to cut transmission loss and block electromagnetic interference. Gold-plated connectors for corrosion resistance. A high-density nylon braid over the outside, reinforced at the plugs, and a stated tolerance of 40,000 plug-and-unplug cycles. It's 1.45 meters — roughly 57 inches — which is long enough to set a phone down on a desk or tray table without yanking the headphones off your head. It's flexible enough to fold into a headphone case.
Buy it if you own one of those Sennheiser models and want a spare or replacement cable that reaches your USB-C phone or laptop, or you want a cable that won't fray at the strain relief after months of backpack life. Skip it if your headphones don't have a 2.5mm socket, or if you're actually looking for an adapter to give a jackless phone a headphone jack — that's the other product.
• Best for mixed iPhone + Android households → KETAKY Plus USB C. One unit, two connectors, no juggling.
• Best for Sennheiser Momentum / HD / PXC / ACCENTUM owners → Gneinour Momentum Cable Compatible. It's the only one of the two that actually plugs into those headphones.
• Best for higher-resolution decoding on paper → KETAKY Plus USB C. The 24-bit/96kHz DAC spec is a genuine audio-path feature; the Gneinour cable passes signal through rather than decoding it.
• Best for inline playback controls → depends on your port. Full controls on KETAKY's USB-C side; none on its Lightning side; the Gneinour cable is a straight cable with no inline module.
• Best for cable longevity and tangle resistance → Gneinour Momentum Cable Compatible. Braided nylon, reinforced connectors and the 40,000-cycle figure point to a cable built to be abused.
• Best for reach → Gneinour Momentum Cable Compatible. At 1.45m it gives you noticeably more slack than a short dongle.
• Best for travel minimalism → KETAKY Plus USB C. At 0.01 kg it disappears into a pocket, and it replaces two dongles with one.
• Best for plug-and-play with zero driver fuss → KETAKY Plus USB C on the Lightning side, Gneinour on the headphone side. Different jobs, both simple.
In my opinion, these aren't competitors — they're answers to two different questions, and the right buy is decided by what's already in your bag. If you have a phone or laptop with no headphone jack and a pair of wired headphones you love, I'd buy KETAKY Plus USB C: the 2-in-1 Lightning/USB-C coverage plus MFi certification solves the most common adapter headache, and the USB-C side even keeps your inline controls working. I'd buy Gneinour Momentum Cable Compatible only if you own a compatible Sennheiser headphone — in that case it's the better product of the two for you, and nothing else on this page will do the job. Check the current price on Amazon for whichever one matches your gear before you commit.
FAQ
Only if your headphones use a 2.5mm input. Gneinour lists it for Sennheiser Momentum 4/3/2.0, HD1 On-Ear, HD 400S, HD 450BT, PXC 550, PXC 550-II and ACCENTUM Plus. If your headphone has a standard 3.5mm jack, this isn't the cable.
They do different jobs, so it's not a like-for-like call. KETAKY Plus includes a DAC rated up to 24-bit/96kHz. Gneinour's cable uses oxygen-free copper and multi-layer shielding to reduce interference and transmission loss. In my opinion, the bigger factor for most listeners is which one fits your hardware.
KETAKY Plus supports answer/end calls on its USB-C side; the Lightning side is audio-only. The Gneinour cable has no inline mic or control module, so treat it as a listening cable.
Ask what's missing. No headphone jack on your phone or laptop? KETAKY Plus. A Sennheiser Momentum-family headphone that needs a USB-C cable? Gneinour.
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