Hi guys, I need a little help. I have been running my Onkyo 609 with 4 channels now since September, and no real problems, but was noticing I was missing out on proper surround sound. My set-up is B&W 685 fronts and 686 rears. I have just bought a M1 centre for it (my AV rack is already tight for space, and this was as big as I could go). I also have a B&W sub. Anyway, I cannot seem to get the centre to work. I have went into speaker settings, and run the test tone, but nothing comes out of the speaker. Do I have to run Audessey again to recognise the speaker? Is there a simple setting I am missing here? Any help much appreciated.