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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-22 · 7 min read · Independent comparison
• okcsc 0.78 — biggest strength: a 0.78 mm 2-pin male to 0.75 mm 2-pin female converter that lets you mate two IEM connector standards that normally don't fit, made from high-purity OFC for signal integrity.
• okcsc 0.78 — biggest trade-off: it's a specialist part for wired IEM owners only. If you don't own 0.75/0.78 gear, it does nothing for you, and it's tiny enough that losing one is a real risk.
• kigpozi USB C — biggest strength: it turns Lightning earphones into something you can plug into USB-C phones, tablets and laptops, with a 24-bit/96 kHz DAC and no drivers needed.
• kigpozi USB C — biggest trade-off: it is audio only. No charging, no data, no OTG, no 3.5 mm, and some Lightning earphones won't respond to their own volume buttons through it.
• Pick okcsc 0.78 if you're an IEM hobbyist juggling 0.75 and 0.78 cables and want to stop buying duplicate wires.
• Pick kigpozi USB C if you've got a good pair of Lightning earbuds and a USB-C device and refuse to replace the buds.
The okcsc 0.78 exists to solve one specific annoyance in the in-ear monitor world: the two-pin connector isn't one standard. Some IEMs and cables use 0.75 mm pins, others use 0.78 mm, and they don't always seat cleanly in each other's sockets. This adapter is a 0.78 mm 2-pin male on one end and a 0.75 mm 2-pin female on the other, so you can bridge the two. If you've ever had a cable that "almost" fits, this is the part that fixes it.
The build is deliberately minimal. It's about 0.19 inches across and weighs roughly 0.3 grams, so it adds essentially nothing to the weight or bulk of your setup. The conductor is high-purity OFC (oxygen-free copper), which is the material you'd want in a signal path this short — the whole point of an adapter like this is to stay out of the way of the sound rather than color it. You get a pair in the box, which matters because most people are converting both channels at once.
Compatibility is where okcsc did its homework. The listing explicitly names a long list of 0.75/0.78 models — KZ BA10, AS10, ZS10, ZSR, ZST, ED12, ES3, ES4, ZS10 PRO, ZSN, ZSN PRO, ZSN PRO X, ZSTX, ZAX, ASF, ASX, EDX, AS16, plus TRN V10/V20 and Moondrop sets — so if you're already in that ecosystem, you can check your model against the list before buying.
Who should buy it: anyone with a drawer of 0.75 and 0.78 IEMs and cables who wants to mix and match without soldering or re-terminating anything. Who should skip it: casual listeners using stock earbuds, anyone on Lightning or USB-C phone audio, and anyone who doesn't already own 2-pin IEM gear. There's also a 60-day warranty, and okcsc says its support team will help with compatibility questions, which is worth using before you order if your model isn't named.
The kigpozi USB C solves a problem Apple created by dropping the Lightning port. If you own Lightning earphones — the ones that used to plug straight into an iPhone — this adapter lets you keep using them on USB-C hardware: iPhone 17/17e/17 Pro/17 Pro Max/Air, the 16 and 15 families, iPads, MacBooks, and a long list of Android devices including Samsung Galaxy S26/S25/S24/S23 lines, Z Fold and Z Flip models, and Google Pixel 10, 9, 8 and 7 series. It's a USB-C male to Lightning female converter, so the phone side is USB-C and your existing earbuds plug into the Lightning socket.
Inside, there's a high-fidelity decoding DAC chip rated up to 24-bit/96 kHz. That's the part that actually converts the digital stream, and the listing claims it filters electrical noise and interference to keep calls clean and music stable. It's plug-and-play — no drivers, no setup — and both the USB-C and Lightning ends are reversible, so you can insert either side without checking orientation. The body is aluminum alloy for heat dissipation, wrapped in a double nylon braid for strain relief, and it's rated to survive over 80,000 plug-unplug cycles. It measures 0.4 ft, so it'll drop into a pocket or headphone case.
Now the honest part, because this adapter has more caveats than most. It is audio only. It does not charge, does not transfer data, does not do OTG, does not work with flash drives or lavalier microphones, and does not accept a 3.5 mm cable. The original earphones' own volume controls may not work through it, even though in-line calls, mic and playback/pause generally do. And for some phone models, kigpozi says you must connect the Lightning earphones to the adapter before plugging the adapter into your device — get the order wrong and it may not register.
Who should buy it: anyone with decent Lightning earbuds who has moved to a USB-C phone or tablet and wants to avoid buying a replacement pair. Who should skip it: anyone hoping to charge and listen at once, anyone with 3.5 mm headphones, and anyone who needs data or OTG. The warranty here is 2 years, which is generous for a cable this small, and support is described as 24/7 with a 24-hour resolution target.
Side-by-Side: Which Should You Choose?
• Best for reviving Lightning earphones on a USB-C phone → kigpozi USB C. That's its entire reason to exist, and it covers iPhone 15 through 17, iPads, MacBooks and most recent Android flagships.
• Best for sound-path purity → okcsc 0.78. OFC conductors and a passive pass-through design mean nothing is re-decoded in between.
• Best for digital audio quality claims → kigpozi USB C. Its 24-bit/96 kHz DAC is doing real conversion work, not just passing an analog signal.
• Best for durability under daily plugging → kigpozi USB C. Aluminum housing, nylon braid and an 80,000-cycle rating beat a 0.3-gram passive part on paper.
• Best for low bulk and near-zero added weight → okcsc 0.78. At 0.19 inches and 0.3 grams, you'll forget it's there.
• Best for charging while listening → neither. The kigpozi explicitly doesn't pass power, and the okcsc is a passive connector with no power path at all.
• Best for someone with no 2-pin IEMs and no Lightning buds → neither. Both are problem-solvers for gear you already own.
In my opinion, the right answer comes down to which problem you actually have, and that's the only honest way to split these two. If I owned a pile of 0.75 and 0.78 IEMs and cables, I'd buy the okcsc 0.78 — it's cheap insurance against buying duplicate cables, it's built from the right material for the job, and it's so small it lives in the case permanently. If I owned Lightning earphones and a USB-C phone, I'd buy the kigpozi USB C, because the alternative is buying new earbuds, and this thing is rated for two years of abuse. I'd only hesitate if I wanted to charge and listen simultaneously — neither product does that — or if my Lightning buds relied on their own volume buttons, which kigpozi warns may not work.
Check the current price on Amazon for whichever one matches your gear before you commit.
No, and they're not interchangeable. The okcsc is a passive 0.78 mm 2-pin male to 0.75 mm 2-pin female connector for wired IEMs. The kigpozi is an active USB-C to Lightning audio adapter with a DAC chip for phones and computers. Different plugs, different jobs.
No. kigpozi states clearly that the adapter is audio only and does not support charging or data transfer. It also doesn't support OTG, flash drives, lavalier mics or 3.5 mm cables — headphones for calls and music only.
Sometimes not. kigpozi notes that the original earphones do not support volume control through the adapter, while in-line calls, microphone and playback/pause do work. Also, on some phones you must attach the earphones to the adapter before plugging it into the device.
Probably not. It's only useful when you're bridging a 0.78 mm cable to a 0.75 mm socket or vice versa. If your current cable seats properly, adding an adapter just introduces another contact point for no benefit. Check your model against okcsc's compatibility list — KZ, TRN and Moondrop sets are named — before ordering.
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