The IIb's are the same way, a point source, just with less EMIMs. The Center EMIM is run twice as loud as the other two above and below it.
Here is a link to a thread with posts by a guy who replaced his RS1B EMIMs one pair at a time starting with the high ones - he thought they blended well...
http://www.audiokarma.org/forums/showthread.php?t=301204&highlight=EMIM
Here is a link to a thread with posts by a guy who replaced his RS1B EMIMs one pair at a time starting with the high ones - he thought they blended well...
http://www.audiokarma.org/forums/showthread.php?t=301204&highlight=EMIM