I have seen that 100-120hz subwoofer XO point before in other forums, some people feel it gives more clarity as you have eliminated the low end from your speakers and given it to the one piece of equipemnt that can really handle it well. I don't buy into it, I have tried 120hz all the way down to 40hz and I do not find it to be any clearer, as you said it could just be these are the ones with in efficient bookshelf systems.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70