From MA website:

Purer by design, our award-winning GX 350set a new gold standard for our celebrated high-end speaker line. Equipped with optimised drivers and empowered by the production quality of our world-beating Platinum flagship range, gilt-edged Gold turns another page in the story of Monitor Audio's audiophile speaker family.

Developing the legacy of three award-winning generations, eight dedicated stereo, center channel, surround and sub-woofer models share a trinity of enhancements including an evolution of the C-CAM® Rigid Surface Technology (RST®) bass cone employed by their Gold GR and Gold GS predecessors; tighter production tolerances for their advanced C-CAM ribbon tweeters, and a smart, magnetic grille design. Our GX range offers greater transparency, consistency and visual sophistication to devotees of sound and style everywhere, leaving you simply to choose the system that's right for your room.

Retail $ 1,400