| 摘要 |
PURPOSE:To adjust a tone quality in a wide range by providing a mechanical tone quality adjusting means in addition to an electric tone adjusting means and interlocking both means to operate them. CONSTITUTION:When a tone quality adjusting operation through a tone quality adjusting knobs 2, 3, 4 is performed, a signal is transmitted to a microcomputer 5 through lines 2a, 3a, 4a. The microcomputer 5 outputs a driving signal to a first-a third motor control circuits 31-33 according to a program, which is previously set based on the choice of a user or the like, and drives and rotates motors 21, 15, 25. By driving and rotating the motors 21, 15, 25, the volume adjustment of a speaker box 16, the installing direction adjustment of a speaker main body 11 and the clearance adjustment between the front end of the box 16 and a speaker grille 40 are performed, and the tone quality adjustment by these mechanical adjustment is performed. |
