Speaker 3d model file can easily modify for your asset and you can use this as your need. This is a basic polygons model. Also provide some formats of these file( FBX, OBJ, MA, MB, STL)
STL (Stereolithography, filesize: 54.7 MB), OBJ (OBJ, filesize: 54.7 MB), MA (Autodesk Maya, filesize: 54.7 MB), FBX (Autodesk FBX, filesize: 54.7 MB)