| 摘要 |
A surround sound system for enhancing a stereo system that has existing front left and right speakers having: a left speaker box (15) on the left of a listening area, left switching means (20a), for selectively switching a driver of the left speaker box to two of the left positive (10), left negative (11), or right positive (13) outputs of said stereo system amplifier (1), to allow alternative selective pair connections of output signals; a similar right speaker box (16) and switching means (20a) on the right of the listening area; and a rear speaker box (17), and driver thereof being connectable to the left (10) and right (13) outputs positive channels of said amplifier (1), whereby all of said speaker boxes are inter-connectable to provide a spatial surround sound field, and wherein different spatial surround fields can be obtained by switching the switching means (20a) and (20b).
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