i used auto-setup on the denon after re-positioning of my main pair of speakers F L/R. It came up with out of phase warning. I checked and the connectors were the wrong way around on the left channel. This is because the calibration disc which uses a special tone confirmed that if I connect it + to - from the speaker and - to + for h/f / l/f to the amp etc. It is in fact in phase for the left channel. This I find quite strange but it does sound more balanced with the left speaker connected this way when playing music cd's in stereo. If I connect the left channel "in phase" this upsets the speaker balance and vocals appear to be coming mainly from the right speaker but when I swap the banana plug around at the amp end out of phase [in phase according to my test disc tones] vocals are more centralised and the sound is more balanced. what is wrong with my system? any ideas?