Basically what I want is to listen to music or watch movies and stuff with my 5.1 speaker setup but I want the sound to come through all 5 of my speakers (and the sub). I don't want to play it in surround sound, I just want to duplicate the sound to all 5 of my speakers so it comes out them all at the same time. I don't want to compromise on sound quality though. I what would be the best and free way to do this? Thanks.
You don't say what make and model these speakers/sub are?
You don't say what they are connected to?
Most AV receivers have a 5.1 or multichannel mode that will play all the speakers all the time.
If you are using a PC then you could connect the front and rear speakers to the green audio output with a splitter. The center and sub would still connect to orange audio output. The fronts, rears and sub will play all the time. The center will play almost all the time.