1. Suggest you see if you have an old stereo system somewhere. That connects easily to your PC and sounds better than most PC speakers. If not consider buying a stereo receiver and speakers vs. PC speakers.
2. Suggest you get a sound bar made to go under the TV used for home theater. This will sound better than PC speakers, especially from 10 feet away.
3. Suggest you use HDMI and run the speakers in the TV set you are using. Many TV speakers are better than PC speakers.
If you do need to use "computer speakers" listen to them first in a room the size of your bedroom. Many of these speakers are designed to sound OK right next to the person listening, not to sound OK across the room. Most will not sound as good as builtin TV...