A loudspeaker assembly comprises a base supporting at least one electro-acoustic transducer and at least one waveguide segment detachably supported by the base. A tensile stress generating film, such as a silicon nitride, is formed on the at least one NFET by blanket deposition and patterning. According to the system, all the coolant flow from the engine is delivered back to the engine after passing through the valve body part and then the heat exchange part in which it passes over the heat exchanger part. A forming roller is inserted inside the blank and then moves radially under pressure until it contacts an inner surface of the blank. To enhance separating of the silicone emulsion waste, the silicone emulsion waste can be heated prior to the addition of the chemicals.