| 摘要 |
PURPOSE:To obtain a sufficient and flat attenuation, by constituting the titled adjusting device as a two-stage constitution provided with a variable attenuator for two parts of a preamplifier, i.e., its input and output side. CONSTITUTION:The variable attenuators 4, 21 are provided respectively between the input and the preamplifier 3 amplifying a music signal and between the output of the preamplifier 3 and a main amplifier 2 driving a speaker. Further, the required attenuation is shared equally to two variable attenuators. The variable attenuator 4 shares the attenuation from 0 to a prescribed value and the variable attenuator 21 shares a value over the prescribed value. |
