Say, for example. I have a set of speakers with 91 dB sensitivity, and a receiver with 130 watts max power. This particular receiver was rated at the SMR forums as having 82 watts of real RMS power. So... I'd think I will be able to get around 109 dB continuos (64 watts RMS power) and 112 dB peak (128 watts peak) - considering every 3 dB require double in power. So far so good. But these ratings are measured 1m away from the speaker, right? If SPL's on a piston speaker drop 6 dB every doubling of the distance, I'd get -6 dB at 1 m, -12 at 2 m, -18 at 4 m? So I'd be getting around 91 dB continuous at 4 meters away from the speakers? That's not even *near* reference, right? Furthermore, the subs I was designing can deliver 120 dB at max RMS power. So they are, to say the least, overkill for my speaker system. My question is... am I forgetting something? I can't believe my system can only provide 95 dB of continuous SPLs with 80 watts RMS. Something must be wrong (I hope). And then, if first, second and third order reflections are the reason the drop in SPL's is not that brutal, if I treated my room as if it were an IMAX theatre (dead silent), would I really only be getting those 91 dBs? Thanks for your help!