LaScala/902/811b in Technical/Restorations Posted October 19, 2006 I have been told the Altec 902/511b is not the combination I want in the LaScala modification. The 811b was suggested with the 902s. " Your plans sound good but you do not need to crossover so low that you need 511 horns. "The LS woofer will go higher. Cross over at 700hz and use the 902s with the 811b horn instead". Can I try the 902s and 811b with BEC crossover that I now have that cross at 400hz(?) or must the xover be modded to cross at 700hz or will the xover recognize the different horn and adjust? I just want to sit the horns and drivers on top of the cabinet and listen fo awhile before I build a new set of scalas. All this is to deal with the midrange that I do not like. Comments appreciated.