Most televisions have decent sound, but some don't. Some have amazing sound, whilst others sound like a forty-year-old scratched up 8-track tape.While 8-tracks are good for old music, they're not so good to get the whole area experience in Mass Effect 2 or Grand Theft Auto: IV, or to get that full battle sound in Ace Combat: Assault Horizon. Here is a simple, step-by-step process on how, exactly, to help you with sound quality. There are two different scenarios, so here is how to do it the way I'm doing it.
Scenario I: Headphone Jack
This first scenario is where you've got your speakers, in my case Logitech Z130 Desktop speakers, which I have for my PC as well, and your TV has a female end (input) similar to the standard audio/video inputs, but much smaller. In this case, you...
1. Simply plug the end of your speakers (the part that normally plugs into your computer) into the headphone input of your television, usually next to where the yellow video input plugs in.
A, voila, you've got PC speakers hooked up into your television, and both your speakers in your television, and your PC speakers are up and running. One thing to point out is that you're able to control the volume of both the PC speakers and your television with one of the units, I.E. the PC speakers go lower in volume if you turn your TV volume down, and vice versa.
Scenario II: AV Cable Attachment
With this scenario, your TV either doesn't have a headphone input, or you want to approach this differently, in some cases with better quality sound. To do this, you...
1. Purchase a Y adapter, similar to this one: http://www.radioshack.com/product/index.jsp?productId=2103367&cp=&sr=1&origkw=RCA+cable+adapters&kw=rca+cable+adapters&parentPage=search
2. Plug the yellow and red plugs from your 360's AV cable into the respective parts of the Y adapter.
3. Take the male plug on the Y adapter and plug it into your speakers. The jack, according to a friend, will usually be green.
Now, in my speakers, I've not the foggiest idea where to plug the Y adapter in, so I just use my headphone plug system. But, my uncle uses the Y adapter split system, and he lives in the same house as my mum, sis and I, so I know for a fact both methods shown above work, and will cause no harm to either the speakers or your 360, or television, given that you do it right, and don't try to shove a bizarre 2cm square plug into a 1cm circular hole. Just use common sense! I will not be held accountable for any fraternal idiocracy which results in a broken component of any system.