<p>A motor for an acoustic device includes an armature; a yoke; at least one magnet disposed in the yoke; and a coil. The at least one magnet defines a space and the coil forms a tunnel, and the armature extends through the space and tunnel. The yoke comprises a single elongated piece of material, and the single elongated piece of material is bent or folded and the two ends attached to form the yoke.</p>
