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If you want to pull clean stereo audio out of an older TV, DVD player or game console and send it to wired headphones, choose NCGGY 192KHz; if you need to plug wired headphones into a modern phone that has no headphone jack while still charging it, choose Marsno USB C. Those are two completely different jobs, and the one that fits your setup is the one worth buying.
• NCGGY 192KHz — biggest strength: a digital-to-analog converter built into a cable, turning an optical (Toslink) PCM signal into analog 3.5mm audio at up to 192KHz, with a 3-foot aux cable included.
• NCGGY 192KHz — biggest trade-off: it is strictly one-way (optical in, 3.5mm out), it needs USB power to run, it won't decode Dolby/5.1, and you can't change volume with your TV remote.
• Marsno USB C — biggest strength: a 2-in-1 dongle that gives a USB-C phone or tablet a 3.5mm headphone jack and passes up to 60W PD charging at the same time, with a built-in DAC.
• Marsno USB C — biggest trade-off: no data transfer, no QC charging, mic support is limited (Apple EarPods excluded), and calling/wire controls don't work on every device.
• Who each is for: NCGGY for home audio gear with an optical output; Marsno for phones, tablets and laptops that dropped the headphone jack.
The NCGGY 192KHz is a problem-solver for older audio gear. If you have an HDTV, set-top box, DVD or Blu-Ray player, PS3 or PS4 that only offers a digital optical output, this cable converts that Toslink PCM signal into analog audio on a standard 3.5mm jack. That means you can plug headphones straight in and listen late at night without waking the house — something a plain RCA-style converter can't do with the same personal, direct-to-headphone approach. The spec sheet lists a 192KHz frequency rating, a braided cable, male-to-male connectors and a maximum voltage of 5 volts, and it ships with the converter plus a 3-foot 3.5mm audio cable. No drivers, no setup software.
Two things to plan around before you buy. First, it needs power: the included USB cord has to go into a 5V/1A port on your TV or a wall charger, or the converter simply won't work. Second, it's unidirectional and PCM-only — optical in, 3.5mm out, and never the reverse. It will not handle 5.1-channel signals like Dolby AC3, so you have to set your source device's audio output to PCM first. Also worth knowing: volume is controlled on the headphones or speakers you plug in, not with your TV remote.
Who should buy it? Anyone with a TV, console or disc player that has an optical out and a pair of wired headphones or powered speakers they want to use quietly. Who should skip it? Anyone hoping to go the other direction (3.5mm into an optical input), anyone with a surround-sound setup feeding it Dolby, or anyone who wants remote-controlled volume. If your device has no optical port at all, this isn't your product.
The Marsno USB C solves the opposite problem: a modern phone, tablet or laptop with a USB-C port and no headphone jack. It's a 2-in-1 adapter — one end plugs into your device, and the other side splits into a 3.5mm aux jack plus a USB-C charging port. So you can listen to music, take calls, play games or watch video on wired headphones while the phone keeps charging. That simultaneous audio-and-power trick is the whole point, and it's genuinely useful on long flights, in the car, or during marathon gaming sessions where a Bluetooth headset would die halfway through.
The audio side uses a built-in DAC chip for stable, low-noise decoding, and the adapter follows the CTIA standard. The charging side supports up to 60W Power Delivery through an EJ899M chip that regulates voltage and current. It's plug-and-play with no driver, and Marsno backs it with a 24-month warranty and 24/7 support. Compatibility is broad: iPhone 15/16/17 families, most Samsung Galaxy S and Note models, Google Pixel, iPad Pro, Huawei and Xiaomi devices.
The caveats are where this adapter lives or dies. No data transfer — it's audio and power only. QC fast charging isn't supported, and on some newer phones you'll want a PD wall charger rather than the brick in your drawer. Samsung Super Fast Charging isn't supported either. The Apple EarPods microphone doesn't work through it, and if you hear echo on calls Marsno suggests a better-quality wired headset. Wire controls and calling also don't function on an iPad Pro 2018, and it's not compatible with every OnePlus, Amazon Fire Max, GoPro, Switch or Moto model.
Who should buy it? Anyone whose phone or tablet has USB-C and no headphone jack, and who wants charging and listening at the same time. Who should skip it? Anyone expecting to move files through it, anyone who needs Apple EarPods' mic to work, or anyone on a device listed as incompatible.
• Best for converting a TV or console's optical output to headphones → NCGGY 192KHz. It's purpose-built for exactly that.
• Best for phones and tablets with no headphone jack → Marsno USB C. That's its entire reason to exist.
• Best for listening and charging at once → Marsno USB C. Up to 60W PD passthrough while audio plays.
• Best for a simple wired headphone hookup at home → NCGGY 192KHz. One cable, one 3.5mm out, no pairing.
• Best for travel and everyday phone use → Marsno USB C. Small dongle, no external power needed.
• Best audio quality ceiling on paper → NCGGY 192KHz. The 192KHz rating is the higher spec figure of the two.
• Easiest setup → Marsno USB C. Plug and play with no separate power source.
• Most compatibility caveats to check first → Marsno USB C. Mic support, QC charging and specific device models all matter.
• Most setup caveats to check first → NCGGY 192KHz. It needs USB power and a PCM audio setting.
In my opinion, the right pick comes down to the port on your source device, not to which adapter is "better." If you're wiring a TV, console or disc player into headphones, I'd buy the NCGGY 192KHz — it does one job cleanly and the 3-foot included aux cable keeps it tidy. If your problem is a phone or tablet with no headphone jack, I'd buy the Marsno USB C, because charging while you listen is the feature you'll actually notice every day. Check the current price on Amazon for whichever one matches your setup before you commit.
They do different jobs, so neither is universally better. NCGGY converts optical digital audio from a TV or console into 3.5mm analog; Marsno adds a headphone jack and charging to a USB-C phone or tablet. Pick by the port you have.
Yes. It supports up to 60W Power Delivery charging while audio plays through the 3.5mm jack. Just note it doesn't support data transfer, QC charging, or Samsung Super Fast Charging, and a PD wall charger is recommended.
No. It needs the included USB cord plugged into a 5V/1A port on your TV or a wall charger to operate. It's also one-way only (optical to 3.5mm), and you'll need to set your source to PCM because Dolby/5.1 signals aren't supported.
For a USB-C phone or tablet with no headphone jack, the Marsno USB C is the fit — but check its compatibility list first, since mic support for Apple EarPods and certain OnePlus, GoPro, Switch and Moto models is limited.
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