| 摘要 |
<p>PURPOSE:To prevent the generation of distortion at a speaker cord part by negatively feeding part of a signal from a speaker input terminal back to an amplifier through a negative-feedback leased circuit provided separately from a speaker cord. CONSTITUTION:A negative-feedback leased circuit line 8 connects a speaker input terminal 6 and a negative feedback circuit input terminal 10 together and is wired along a speaker cord 4. When an input signal is supplied to the input terminal 2 of an amplifier 1, the output signal of the amplifier is supplied to a speaker 7 via the speaker cord 4. If the speaker cord is long, the output signal is distorted owing to the resistance, capacity and inductance of the speaker cord. For this purpose, the output signal arriving at the speaker input terminal 6 is supplied to the negative feedback input terminal 10 through the negative-feedback leased circuit 8 to provide the negative feedback without distortion.</p> |
