The LFE limit for subs on the Denon is set to 120, I'll increase the crossovers for the up-firers to that value.
The LPF of LFE filter only applies to the LFE channel if and when present. This filter has no effect upon the ctossovers or the frequencies being redirected to the subwoofer in association with them.
There is no limit upon the frequencies that can be redirected to the sub other than the crossover setting limit itself. This would be 200Hz.
By the way, the reason you'd leave the LPF of LFE filter set to 120Hz is because this is the ceiling for the LFE channel in assciation with Dolby encoded soundtracks.