Hi all .... Please can you advise me .... My problem ... I find that when I use a center speaker in my system, I loose too much bass and presence, although I get better vocals and centre soundstaging. Is this because I have a substandard centre or is it because I do not have a sub-woofer? My system is: Yamaha RX-V795RDS, Acoustic Energy AE109 Floorstanders (fronts), Acoustic Energy Centre, Acoustic Enery Aegis 1 (Rears). Thanks all !