I am reading the PDS for the Studio v.4 and it says Studio 20 ±2 dB from 54 Hz - 22 kHz, Studio 40 ±2 dB from 62 Hz - 22 kHz (on axis). Is this a mistake and maybe should be reversed? Reason I ask is because I am trying to pick a frequency cut-off for my 20's / sub. I was thinking that since my Studio 20 v.4's are bi-amped and clean quite low that my lower end Energy EW-100 might tighten up if I give it a narrower range to cover than the usual 80Hz cut-off. Thanks.