| 摘要 |
PURPOSE:To facilitate large-output 4-speaker stereo reproduction and 4-speaker pseudo surround reproduction by dividing 2 systems of audio output circuits into conventional R, L channel one system and R-L, L-R channel one system and forming the latter one system to be switched into the conventional R, L channel. CONSTITUTION:When changeover switches 9a, 9b is selected on the position opposite to the arrow, a signal R is generated at output terminals Routl, Rout2 and a signal L is generated at output terminals Lout1, Lout2 by the entirely same output system as a conventional system. In throwing when the changeover switches 9a, 9b is selected on position shown by an arrow, a signal R is generated at the output terminal Rout1, a signal (R-L) at the terminal Rout2, a signal L is at the output terminal Lout 1 and a signal (L-R) is generated at the terminal Lout2 to output a pseudo surround component. Thus, the 4-speaker stereo system is enjoyed normally and by selecting the changeover switch 9, the (2-speaker front face stereo)+(2-speaker rear face surround system) is enjoyed. |
