Hello we have recently purchased a 106 in screne and LCd projector, and we put our centre front speaker in front of the screne, built a small stand for it and it low enough that it does not take your eyes from the screne as it sits just below where the screne pulls down, looks great, sounds great!
a tech guy told us that if you have your speaker behind the screne , it will effect the quality of the sound........ so we followed his advice