Using Pioneer vsxd812 to drive - Tannoy Revolution Centre, Tannoy R1's as surrounds Nad 319 amp linked by pre-out to drive Tannoy R3 Front Speakers All set to Large - Medium Sized room - I have set the speaker distances. However I have not performed the MCACC set up (apparently the 912 had a microphone to do this automatically) Will this process dramatically improve the sound? How do I perform the set-up without a sound meter? I have to say that I haven't been knocked dead by the sound - And I've listening to most settings - I prefer the "game" setting as it seems to boost all levels and make the sound come alive. Is there anything I've done wrong. I'm using a Philips DVDR80 with digital light connector to the Pioneer. Sound from the Sky Digibox is also very poor quality.