From the beginning to end no detail gets over looked. We start with an idea, then to a sketch, to a functioning 3D model, then finally a prototype. You can see every detail in this cutaway that goes in to making this work of art. This process also helps us make a stronger more reliable motor design. We use high grade steel for the T-yolk and top plate, optimize our magnet slugs and get maximum cooling. Add all this to our soft parts and tooled frame and you have the perfect subwoofer we call the Zv.4. Proudly engineered in the USA!