| 摘要 |
PURPOSE:To attain the multi-function and miniaturization of an on-vehicle audio device by incorporating the functions of a graphic equalizer, a surround circuit and a position selector into one circuit. CONSTITUTION:Left/right front outputs FL, FR and left/right rear outputs RL, RR are provided. Further, the titled device is consting of a graphic equalizer 1 switching the frequency characteristic of front side left/right stereo input FL1, FR1, a surround circuit 2 subtracting one of the left/right stereo signals L, R outputted from the equalizer 1 from the other at a prescribed ratio (k) to output system surround signals 1-kR, R-kL, a function forming left or right signals L+mR, R+mL being the result of addition to one of the stereo signals L, R to the other with an optional multiple ratio (m) to retard them, a function adding the stereo signals L, R to form the left/right common signal L+R and a position selector 3 selecting the signals to form the left/right front side output FL, FR or rear side outputs RL, RR. |
