Not sure if this is the right thread, but, here it goes anyway. Until now, i've only had 2 front speakers on my receiver. I'm going to get a center and surround speakers eventually. My question is: when i play CD's and MP3's, will the music come out of ALL speakers or just the front 2? (I know that most music is stereo), but, i was just wondering.
It looks like your JVC is a surround receiver. Most surround receivers have some sort of processing that will allow you to listen to stereo sources using all 5 speakers. It varies from manufacturer to manufacturer as to what it's called, but it's usually along the lines of "5 channel stereo" or something to this effect. Not sure if your receiver has this. It rarely sounds as good as 2 channel stereo, in my opinion.
I agree that 2-Channel is usually (and by usually, I mean almost always) your best choice for listening to music, but if your CD or DVD player is capable of playing SACD or DVD-A discs (It will usually state it somewhere on the faceplate of the player), then those formats are capable of playing "surround" music through all 5-channels.