| 摘要 |
PURPOSE:To make unnecessary the low tone amplifier and to reduce the required area, by operating the low tone speaker system of stereo reproduction system in 3D system as the composite type direct radiation speaker system to the in-phase components of the left and right both channels. CONSTITUTION:The low tone speaker system 30 is constituted with the radiation speaker 34 fitted to the external enclosure 32 and the auxiliary speaker 38 fitted to the internal closed type cabinet 36 contained in the enclosure 32. This speaker 34 is connected to the left amplifier 12 via the left LPF40 to drive the low component of left channel, and the speaker 38 is connected to the right amplifier 14 via the right LPF42 to drive it with the low component of right channel. Further, the speakers 34 and 38 are acoustically connected in series to the in-phase component of the low tone band, they are operated as the composite type direct radiation speaker system to the in-phase component, allowing to reduce the required volume without using low tone amplifier. |
