So 5.1 sound is 5 speakers (2 front, 2 rear, 1 front centre) and a sub woofer. OK, but what if I don't get all my speakes at once? I only have 2 stereo speakers at the moment (Tannoy MX2s). I'm planning to get a couple of MX3s to be my fronts, move the MX2s to the rear, get an MXC centre and I think Tannoy have make a sub in the MX range also. However, what if I just get the MX3s first so I end up with only 4 speakers for the time being (no centre and no sub) - if I hook these up to my AV receiver will that still work? Will I still get dialogue for example? I'm not sure how discreet the channels are on 5.1 - does all the dialogue go only to the centre speaker? Similarly, does all the bass sound go only to the sub? Michael.