ive recently bought this, and it seems great. sometimes dialougue isnt so great to the centre speaker. (B&W CC6). but when i was fiddling with the menus i found an option to turn OFF dolby pro logic. i use the cinema EX B sound field as i believe it is by far the best. when pro logic option is turned off the sound sounds MORE surround, dramatic and has a greater quality to it with more weight. why on earth is this?! even when playing CD'S it produces a surround sound which sounds better. my guess is that it uses less power as it dosnt have to give sound to an extra channel. i think this as when its ON the display has a little box with an S in it. is this intended for 6:1 or something? my rears are to my side anyway so i dont need any rear sound. i have yet to try it on a dvd yet, but tv, game and CD all sound better. if anyone has any idea then please help. thanks. any other tipe for my set up will be gratefully recieved also. <br />DB1070 amp.<br />2 B&W 601 front speakers.<br />1 B&W CC6 centre speaker.<br />2 B&W 3 series rear speakers.<br />1 yamaha 100W sub. <br />thanks.