| 摘要 |
A loudspeaker system with three loudspeakers (LF, LR, LB), includes a first and a second amplifier (BF, BR), each of which amplifies a channel of an audio signal. The outputs of the amplifiers (FDA, FIA; RDA, RIA) are in phase opposition, wherein the outputs of the amplifiers (RDA, FIA; RDA, FIA) are each connected to the inputs of the first and second loudspeakers (LF, LR). The outputs of the amplifiers (RDA, FIA; RDA, FIA) are also connected to the inputs of the third loudspeaker (LB). A high-pass filter (HP) and a low-pass filter (TP), which are used to partition the audio signal, are connected in parallel. As the amplifiers, bridge output stages (BF, BR) are provided. The output of the high-pass filter (HPA) is connected to the inputs of the two bridge output stages (BF, BR). An inverter (IF, IR) is provided in each case between the output of the high-pass filter (HPA) and one of the inputs of the bridge output stages (BF, BR). In front of each of the inputs of the bridge output stages (BF, BR), summators (SF, SR) are connected, and the output of the low-pass filter is connected to the inputs of the summators (SF, SR). With one bridge output stage (BR), an inverter (IB) is provided between the output of the low-pass filter (TP) and the inputs of the summators (SR). The third loudspeaker (LB) is connected to two opposite-phase outputs of the two bridge output stages (BF, BR).
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