The invention removes copper from the concave side of a flex circuit around a bendable region and replaces it with a conductive epoxy to allow it to be formed to tighter bend radii than would otherwise be possible. The acoustic backing material may contain additional features, such as tabs or notches, for use in positioning the transducer on fixtures during manufacturing or positioning the transducer within a housing during final assembly. The heating electrode includes first, second and plate portions. The next die holder is then tightly pressed from the bottom onto the lower surface of the extrusion head by the press member. It is contemplated that the tufting machine can be used to maintain the color of the tufted carpet at a desired color during the operation of the tufting machine.