| 摘要 |
PROBLEM TO BE SOLVED: To obtain a loudspeaker system that can be combined with loudspeakers having various impedance values. SOLUTION: The loudspeaker system 10 includes a piezoelectric vibrator 12 which acts as a sounder. An impedance conversion transformer 14 is connected to the piezoelectric vibrator 12. A 1st external connection terminal 18 is connected to one input terminal 14a of the impedance conversion transformer 14 via a 1st receiver 16, and a 2nd external connection terminal 22 is connected to the input terminal 14a via a 2nd resistor 20. A 3rd external connection terminal 24 is connected directly to other input terminal 14b of the impedance conversion transformer 14.
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