Check out my drawing at: -

http://www.greenie512.net/greenie512/html/Power_Tapering.html

Jim Griffin suggests feeding more power to the central units and less to the outer drivers (left speaker on drawing). Wouldn’t your suggestion (right speaker) simply put more power to the top (or bottom – if I got the groups wrong way around?).

Sorry for hassling you when I had said I understood your suggestion earlier – I thought you were adding more to the central group when I first saw your reply.