

When hooked up to an iPhone or iPad, it’s not the cleanest setup. For Apple devices, you do need the Apple Lightning to USB Camera Adapter, which adds an additional $29 to the price. You can do the same on a PC, or use the included USB-C to USB-A adapter. Depending on the device that you are using, it’s as simple as plugging into a USB-C port on the bottom of your mobile device. Not surprisingly, setting up the THX Onyx is simple. One other handy design feature is a magnetic connection that enables the Onyx to fold back onto itself and work as a cable tie to clean up headphone cables or just make Onyx a little more convenient for travel.

Blue signifies 44.1 or 48 kHz PCM, which is standard quality, then yellow is higher than 48kHz PCM, orange is a DSD direct stream digital, and magenta represents an MQA file that plays at the best quality. Then, when media is played through, the LEDs will signal the quality of the file coming through. When first installed, the LEDs will flash a pattern while initializing. Onyx also incorporates three LED lights that can signify a few different things. A 3.5mm jack also supports mic input, which enables the use of headsets to take calls or play games and communicate with teammates while using Onyx. Housed in black, Onyx has a machined and polished THX logo that is simple yet eye-catching as well as some polished accents on the connectors. With their focus on premium sound, THX has also delivered a premium feeling DAC/amp for mobile. Onyx also works to play and improve any other audio as well and provides plenty of power thanks to the THX AAA mobile amplifier. These tracks pack some extra information into the file and when decoded with a compatible device produces playback that is studio-quality – like you are sitting in the studio with a recording artist. As a part of that conversion, it can also decode and render MQA (Master Quality Authenticated) tracks as well. In an extremely simplified synopsis, Onyx is a DAC (digital to analog converter) amp for taking a digital signal from a source and converting it to analog audio to send to a pair of headphones or even powered speakers through its 3.5mm jack.
