| 摘要 |
PURPOSE:To adjust tone quality and balance by one operation by applying connection so as to replace the hot and earth position of a variable resistor of either of both L and R channels. CONSTITUTION:Switches S1-1, S1-2 to replace the hot and earth positions of a variable resistor VR2 of the R channel are provided. When the switches S1-1, S1-2 are thrown to the position A, the R and L channels are in the same state and when a slider Y of interlocked variable resistors VR1, VR2 is selected to a point X, frequency selection circuit F1, F2 are connected in parallel with emitter resistors R3, R6 of transistors (Tr) T1, T2 to increase the gain. On the other hand, when the switches S1-1, S1-2 are thrown to the position B, the state of the points X, Z at the channel R is reverse to that of the channel L, and in moving the variable knob toward the boosting position, the frequency characteristic is reversed. That is, the sound quality and balance are adjusted at the frequency band in setting a proper position. |
