Using a NAD319 to drive front two Tannoy R3 speakers and and Pio VSXD812 to drive Tannoy Centre and Tannoy R1's as surround. No Subwoofer. Question: I have set the front speakers to Large on the PIO, what should the settings be for the centre and surrounds (Large or Small?). Also - if I don't have a Sub - do I need to be bothered with the Crossover settings? Regards Dean - Newbie!