I have the choice of large or small for speaker settings on my AV amp. I have a pair of Eltax Liberty 5+ f/s for front L+R, Acosutic Energy Aegis centre, and Gale 3060B Bipolar rears. I currently have the front three set to large and the rear bipolars set to small. Is this right, or should it be set differently. Small cuts off below 90 hz, large has no cut off.