| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic system, enabling easy installation on a room ceiling or a wall at low cost.SOLUTION: The acoustic system comprises: a main speaker unit 3 of a ceiling/wall built-in type, for outputting one channel sound from a main speaker 10; and a sub-speaker unit 5 of a ceiling/wall built-in type, for outputting the sound of one channel, either identical to or different from the one channel for the main speaker unit 3, from a sub-speaker unit 19. In a state a commercial power supply line 2 is connected to the main speaker unit 3, the main speaker unit 3 receives a voice signal reproduced by room-side equipment 4 through radio communication, to output sound from both units 3, 5. |
