Eminence cast aluminum Eminence chassis are lightweight and strong. Aluminum does not conduct the magnetic field out of the gap, thereby making the motor strength higher and the stray magnetic field lower. We coat each chassis and all metal components with an epoxy-acrylic finish using our in-house e-coat process. We can control the thickness of that coating to within 0.001 inches, Thickness is critical when working with close tolerance transducer motor designs.