| 摘要 |
It is possible to place a loudspeaker at an arbitrary place without deteriorating the indoor decoration and without being limited by an environmental condition. There is provided a ceramic type loudspeaker driven by a drive device outputting an audio signal. The loudspeaker includes: a loudspeaker driver (50) in which a secondary side coil (53) of a first transformer (45) to which an audio signal is inputted from the drive device is electrically connected in series to a primary side coil (54) of a second transformer (46); a series/parallel circuit unit (69) including a parallel connection of a plurality of series circuits in which first and second ceramic oscillators (25, 26) and third and fourth ceramic oscillators (27, 28) driven by the audio signal from the secondary side coil (56) of the second transformer (46) of the loudspeaker driver (50) are connected in series. The loudspeaker (50) adjusts impedance matching between the drive device and the series/parallel circuit unit (69). |
