A speaker apparatus includes a speaker, a tubular duct extended in order to make the sound generated in the inside of the cabinet of the speaker get to the vicinity of the listener’s ears and a support mechanism that rotatably supports the tubular duct in order to bring the front end aperture of the tubular duct to the vicinity of the ears of the listener. A separate mixing frequency signal is provided to each stage. The coating is formed over the read wires and is extended to the surface of the flexure. Other systems and methods are also disclosed for retaining magnetic recording performance while reducing a thickness of a main pole. Finally, a second etching process is performed to transfer the pattern from patterned mask to the thin film layer.