According to the manual, the 1000X assumes that line level and XLR inputs are going to come from the LFE output of a home theater processor and the internal crossover is bypassed. So some form of external bass management IS required if using this input.
@jaytor Hm. Seems a real shame to have all that control thru a bluetooth app and then throw it away just because a hardwired input is used. Doesn't make sense.