Generic 3D Speaker, low and high blender poly versions in file. Low poly version has modifiers that can be applied via Blender.

The Speaker is composed of only PBR (Principled BDSF) textures, and should be engine ready.The Speaker features a tweeter and a main Driver. The textures are changeable but in the previews are a smooth plastic front plate, three material driver with metal outer ring, and three material tweeter with metal outring and metal fixations. The rest of the body is a semi rough plastic.

This was made in blender and was rendered both in Evee and Cycles. The exports may present some issues, and I can only guarantee the quality of both blender files.