2.1 home theater can change into 4.1

[skkworld]

I have a connected 2.1 home theater speaker with sub woofer to my LED TV, any idea to change it as 4.1 speaker

output Audio splitter to extend the speaker?

 

[kanewolf]

A true 4.1 speaker system would have 4 discrete audio channels. Your system has only 2 inputs. You could attempt to run another set of speakers in parallel with your current ones, BUT that would probably blow the amplifier because it was not designed to handle that situation.

You really need to buy a new speaker system.