I may be wrong on this, but isn't maximum reference level for the LFE channel 115 dB? Isn't it 105 for the 5 full range channels and 115 dB for the LFE channel? Matt
Assuming that when you calibrate the sub, it accounts for room gain at the various frequencies (I know this really is a BIG if), then the highest SPL that should EVER be reached at reference level in the room is I think 115dB if you're only looking at the LFE channel, and if you include rerouted...