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(11) | EP 1 355 510 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Loudspeaker arrangement and switching apparatus therefor |
| (57) There is provided an acoustic sound reproducing apparatus for a first audio signal
and having an input terminal for receiving a second audio signal, a selector switch
and at least one loudspeaker. The at least one loudspeaker is driven by an output
signal from one of the first or second audio signal through the selector switch. As
a result, the acoustic sound reproducing apparatus, and the apparatus providing the
second audio signal, can commonly use a single loudspeaker or set of loudspeakers.
When the external audio signal is selected, the internal loudspeaker(s) becomes part
of the external loudspeaker arrangement for a surround sound system. When more than
one loudspeaker is used, the loudspeakers are connected to each other in series when
they are connected to be driven by the external second audio input signal instead
of each being driven by their respective amplifiers. This permits the loudspeakers
to be driven by an external amplifier having a higher power output than the internal
power amplifier so that the loudspeakers will not be damaged when driven by a higher
power external amplifier. |