







🎶 Elevate your audio game with crystal-clear digital sound—don’t miss out on next-level listening!
The Cubilux USB C to SPDIF Transmitter converts your computer’s USB-C port into a high-quality optical audio output, delivering 5.1 surround sound and stereo audio at up to 192KHz/24bit resolution. Designed for plug-and-play use with MacBook Pro/Air and other laptops, it offers reliable, driver-free operation in a compact, travel-friendly form factor. Ideal for connecting to soundbars, DACs, and home audio systems to unlock premium digital sound.














| ASIN | B09QFYNB7Y |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 3,086 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 4 in Digital-Analog Converters |
| Colour | Clear |
| Customer Reviews | 4.4 4.4 out of 5 stars (833) |
| Date First Available | 28 April 2022 |
| Finish | Metallic |
| Item Package Quantity | 1 |
| Item Weight | 10 g |
| Item model number | CUB-USBOPT |
| Manufacturer | Cubilux |
| Part number | Z10-14BK |
| Plug profile | Bar Mount,Plug Mount |
| Product Dimensions | 22.86 x 2.03 x 1.52 cm; 10 g |
| Specific uses | Computers, Laptops |
| Style | USB C to SPDIF |
| Voltage | 5.2 Volts |
P**R
Great little USB-C to optical adapter – perfect with Chord Mojo 2
I bought this Cubilux USB-C to SPDIF transmitter to add an optical output to my devices, and it has worked exactly as I hoped. I use it to connect my iPhone to my Chord Mojo 2, and also my laptop to the Mojo 2, and in both cases the sound quality is very good – clean, detailed and noise-free. Setup is as simple as it gets: plug it into the USB-C port, connect an optical cable to the DAC, and it’s ready to go. No drivers or fiddling with settings were needed in my case. It locks onto the signal reliably and I haven’t had any dropouts or glitches. The build quality feels solid for such a small device, and it’s compact enough to throw in a bag for travel. For anyone who wants to add a proper digital optical output to a phone, tablet or laptop and feed a high-quality DAC like the Mojo 2, this is a very handy little adapter. I’m very pleased with it and happy to recommend it.
W**L
Simple plug and play USB C to optical adapter
works completely as expected. Plug and play on both Windows 11 and Mac without any setup requirements. Sound quality is unaffected with no audible delay. It is abit pricey for what it is, but so far has done the job reliably
B**L
Brilliant cheap solution for 24/192 Dolby Atmos audio from M-series Macs.
Ideal for MacOS. I get 24 bit/192 kHz audio out from USB C to Toslink for a very cheap price, so this is great value. As it's just in a cable-size format, it's compact, it's easy to connect, and so far now - several months - it seems there's little to go wrong, so I'm content with the build quality. The step up from analogue to 24/192 digital audio - including Dolby Atmos from Apple Music - is astonishing.
G**T
Solves drop out sound problems with Mac M series chips on usb c/thunderbolt,. .
Very pleasantly surprised. I have only had it a couple of days so I cannot comment on its longevity but it does actually work. Its installed between a Mac Air M4 and a Yamaha 501 amp. It also works on my Teac DAC but as it has a single output rate only, its actually a better sound using the shortest path direct to the amps optical input. The sound lacks depth but that can be fiddled out to some extent and given my computer library is mostly old recordings that are not always CD quality that does not really matter. Stereo definition is also definitely there. All in all a great solution assuming it lasts and is well worth the £21 quid it cost. Problem is most buyers will, like me, be audiophiles and will expect it to be perfect which is not But is does solve the drop out issues that M series Mac users are experiencing with even the best DACS that don't have native usb c. And i.t also works perfectly well with the computer set to low power.
S**G
Great for music but doesn't work with the Apple TV app
I bought this as a way to get lossless audio from my iPad, iPhone and windows laptop to my HiFi and this works almost flawlessly. When steaming music the quality is amazing, no issues at all and audibly better quality than Bluetooth. YouTube and Netflix also work great, but when streaming video using the Apple TV app no audio comes through (using Windows and iPad apps). Luckily this isn't a dealbreaker for me (and also is likely Apple's fault rather than the manufacturer, since it works with other streaming services, hence I haven't docked any stars) but I would look for another product if playing back Apple TV content from a laptop or iPad will be important for you.
A**.
192Khz 24-bit PCM S/PDIF Output. Short flimsy cable, but still good value.
Does exactly what it says. Outputs S/PDIF digital 2 channel PCM audio at up to 24-bit 192khz. Easy to connect. Cable attached to it seems a little flimsy and it isn;t very long so I avoid putting strain on it, I never let it dangle. But because it is so short it usually sits next to my laptop on my desk, and I use a longer SPDIF cable to my DAC or receiver. But if you have a desktop with high up USB sockets, I would recommend connecting a USB C extension cable to this, so the usb cable end doesn't dangle. This is good value for money though. So simple yet some sound cards which do the same thing cost upwards of £70.
T**B
Doesn’t support 24/192
Doesn’t support 192khz/24bit as described. Worked ok at lower rates, but cut out when using anywhere near the advertised max.
M**L
Really does 24bit/192kHz (but need to adjust some settings - see screenshots).
Fantastic little USB to SPDIF optic interface. I'm using it with a FOSI Audio DAC-04 Headphone amp, it's currently (the amp) unavailable but the identical looking AIYIMA DAC A2 is. I used to use the USB input for the audio signal but it was limited to 24bit 96kHz whereas the amp is capable of 24bit 192kHz when operating over optical. With the little Cubilux adapter I get the full 24bit/192kHz and sounds great with a pair of Bose headphones. Note you have to go into Sounds/advanced settings for your device to increase it from the default on Windows 10. I have attached some screenshots that show how to do this on Windows 10. Although I have a company laptop that runs Windows 11 I haven't tried it on there (our IT dept are very fussy about unapproved USB devices) but I suspect it will be very similar. I don't know about Chromebook or Apple sorry. I only use it for 2.0 stereo but I think it's great value for money as the sound from my amp is very good. Amazon music has plenty of high bit rate music to enjoy (I pay for my Amazon Prime).
S**N
Excellent little device at a great price. It acts as a USB Audio Class 2 device. Plug it into USB on a computer, phone or tablet (including via a Lightning adaptor on iPad/iPhone), and you get out optical audio, suitable for many items of audio equipment. I tested it thoroughly. It provides bit perfect performance on CD-standard digital audio -- 44.1kHz -- and also supports 48kHz, 96kHz and 192kHz, 16 and 24 bits. It does NOT support 88.2kHz or 176.4kHz. These are relatively rare, but do exist. Your device will convert them to 96kHz or 192kHz. Formats as shown in image. In 99.9% of use cases, though, the gadget it great.
F**A
Works as intended and is picked up right away by osx.
T**J
Werkt probleemloos, geen stroom nodig.
D**S
Worked Perfectly to connect my studio speakers to my desktop computer.
R**Y
amelioere vraiment le son de son telephone et le converti en sortie optique la prise audio numerique qui est apparue avec le son du SA-CD et donc vos fichiers sont sublimés dans une resolution dsd 64 ce qui est deja pas mal
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