How do i use stereo speaker for the computer
You can use stereo speaker on your computer if your audio controller or sound card supports it. Some sound cards can only support a minimal setup while others can support a 5.1 setup or even better. Most new motherboard have integrated sound solutions that can handle this and a discrete sound card is not anymore necessary. Not unless you need to do some really complicated sound related applications. Once you have your stereo speakers, just connect it to your computer's audio port/s and it should work. If you would like to setup a better sound system on your computer, just follow the motherboard manual's instructions on how to get the sound system connected to the computer and you're good to go.
you mean stereo speaker amplifier it same to use computer speaker install your audio driver and connect to the pc.