what's a subwoofer? a bass?
If there's 5 speakers, how do I know which 1 is for the left front or left back, right front, etc..?? Will it say on the speaker?
the sub is your main bass source, if you turn your sub off... there is next to no bass left running through your system.
I have the G51 and I can tell you in confidence that they are a great system. Sound very good for music and movies.... and of course games. They are nowhere near as powerful as the Z-5500s but if you have a small area then the G51 will be plenty. I have them in my bedroom and they are more than enough but if you have a bigger space and like everything loud then the Z-5500s or other high RNS output systems would be better for you
When it comes to which speaker is which... the G51 have colour coded cables so instalation is easy and each speaker (i.e front right, front left, centre, reas left, rear right) are easily distinguishable by the cable colour and cable length...
hope that helps