"High-end headphones often have a high impedance and work best with a headphone amp. The LCD-GX has a low impedance of just 20 ohms, so it doesn’t require an amp to work well (the $4,000 LCD-4, for comparison, has an impedance of 200 ohms and effectively needs an amp). The headset worked fine plugged into a Google Pixel 3a XL, a Nintendo Switch Lite, and an Xbox Elite Wireless Controller Series 2 connected to an Xbox One X."
"The LCD-GX uses 105mm planar magnetic transducers capable of a range from 10Hz to 50kHz. They’re larger than the transducers in the LCD-1 (90mm) or Mobius (100mm), and are closest to the LCD-2 in specs. Planar magnetic transducers, along with an open-back design, can produce much better imaging and a sense of space than closed-back, conventional-driver headphones simply can't. This design and the engineering that goes behind it are the primary reasons this headset costs $900."
"The Audeze LCD-GX is quite simply the best-sounding gaming headset we’ve ever tested. It outclasses other high-end headsets like the Sennheiser GSP 670, the Astro Gaming A50, and even the Audeze Mobius in audio depth and clarity, which should be expected for $900. It’s wildly expensive and doesn’t have any unique processing tricks like other high-end gaming models, but for the pure listening experience, you won’t find a better headset. The LCD-GX isn’t for everyone, but if you have a very discerning ear and very deep pockets, this is the headset to get, and an Editors' Choice."