Yamaha 675 tips & advice

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Hello

I have just bought the Yamaha 675 ,and was wondering if you could supply some tips & settings for the correct sound settings please

The room is about 14feet squared .

The speakers are Mission MX1 front & rear MXC1 centre

I have the rear speakers connected so on the sound test,they are shown as the side speakers,is this correct ?

Thank you

 

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I have the fronts & centre set to large,the SUB set to extra Bass. I have increased to the Bass & Treble,was set to by-pass

Sound is Straight with Enhanced

Thanks