Theatre organ sounds on a KN6XXX no good? Try layering some. As a starting point any theatre organ preset on R1 at a level of 127. Add Tibia Chorus on R2 at level of around 118 and lowered 2 octaves. On left modify Theatre Accompaniment by adding a 16' voice at a level of 80 and lowered 2 octaves. Set the overall Left level around 76. Feed the output through an external amp/speaker combination with some real bass response and compare the difference with the basic voices.
Cheers
Len C.