The reason I feel it is an excellent question is just as you just stated. THX crossovers are at 80hz. Most processors have crossovers at 80hz (although some offer higher settings, but then bass begins to be locatable). So why not have these speakers tuned to 60 or 70hz so that they blend well with an 80hz crossover? I understand they are sealed enclosures and as such have a mild rolloff compared to ported speakers. This means that they do not need to go as deep as their ported M22 cousins to blend well at 80 hz. Why weren't they tuned below 80hz so that there would be no speaker induced rolloff above the crossover?
