I guess you get out of your speaker what you put in them. but where is the cut off. i would like the best speaker to match the performance of my receiver. how do you compare the specs for this? is it by way of $$, ie my receiver cost 700 bucks so spending $1500 on speakers is over kill? i bought a sub that cost more then my receiver does that not make sense? in other words will i only get $700 worth of performance out of my $1200 sub?