set speakers large or small?

wtf are you guys talking about,please come down to my level

m/n sf128vx1o its about 12 years old,friend gave it to me.i called velodyne and they said to set the receiver at 80 and the sub crossover at 100.there is not a on/off direct switch on the sub

thanks alot,i will try setting them a 100

ok if i set the sub at 80 what should i set my recv. at

wow,a lot to take in,i did use a spl meter to set it up but my room is a little strange i think the best thing i can do is try differant settings and move my speakers around a bit,not much room for movement and cannot move sub at all.i would like to thank you all even though a lot of it was over my head