I would have replied much sooner had I seen this post. The 150Hz suggestion in the manual was a conservative number for those volume junkies. I personally use 80Hz on mine, but do not take my settings as "recommended by Klipsch". The speaker was designed with Atmos first and foremost the target, but the speaker is pretty versatile.
When a speaker is set to "Dolby Enabled" in the AVR, it does NOT set a high pass filter, or engage some hidden filter for those channels. Atmos channels are all full range, it is up to the end user to set bass management properly.