The Speakers was natively modeled and rendered in Autodesk maya 2022, however it works fine in any older version that arnold has, anyway the materials have all their pbr textures, so it can be used in any other engine rendering with ease, in the file that I leave from maya there are two scenes, one contains the exact scene that I use for the results you see in the previews, and another scene only contains the modeling.
All textures are in high resolution 4096x4096and the structure of the main base is in 8192x8192 with their channels of: Base color, Metalness, Roughness, Height, Normal
included : MAYA FBX OBJ c4d