I have Qs4 surround speakers in my 15' x 12' room along with m3ti fronts and a vp100 center. I have a Harman kardon 220 reciever. I am wondering whether I should set the surrounds to "large" or "small" on the reciever. In the manual it says if your speaker can handle frequencies under 100hz then set them as large. But the Qs4 only goes down to around 70 I believe. So is the large setting or the small setting better?

Mike