No it has nothing to do with removing the crossfader....The crossfader is miles aways from any machinery in the unit. It just sits all by itself with only one wire connecting it to the board (which is miles away from the crossfader).
I find it hard to believe this is isolated to my unit only. I suspect people and their love for this unit (and the money they spent on it) will have them either NOT doing the test and saying they did or not doing it properly or just being in total denial completely. Im not saying this is the case for you hesitant, buti ts just one of those things people dont want to except. If this is the case they will find out soon enough when they play in clubs with actual sub woofers....