Toshiba NB550D No sound from subwoofer

There was no sound play from the subwoofer of my nb550d (the speaker underside) although i turned the volume to maximum.
Any people met this problem and how can you fix it?
Tks

Hi mate
What subwoofer do you mean?
The NB550 does not support any subwoofers
Some models are equipped with an speaker which is placed at the bottom of the unit but this is not a subwoofer this speaker emits sound generated by software as well as audio alarms such a low battery condition, generated by system
So usually you should hear just short beep sounds coming from this speaker.

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