For $22,000/pair (here in Canada at least) I don't think it's unreasonable to expect frequency response of 20hz-20khz but the Klipschorns can't do that which is weird because they use 15" woofers and they're huge. There are plenty of subs under $1000 which produce deeper bass. Like I said, my little 8" Audioengine sub was less than $500CAN and produces deeper bass than the Klipschorns so if I worked for Klipsch I would try and improve the bass from them