speakars

Hi, I am looking to buy a decent 2.1 speakers which I am going to use with my laptop (and sometimes with led tv) mostly for watching movies and listening to indie / pop music. I visited Croma and one other store, but they seem to have only Philips MMS-4040F for demo and rest of the choices are...

i have acer as4710 notebook,and altec lansing 5.1 channel speakars my notebook has only one audio output jack,but 5.1 channel speakars has 3 audio jacks each jack represents two speakars of 5.1 channel.how to connect these three jacks to my notebook. please give me a solution.