If it sounds good to you, and you are not having any problems achieving the volumes you prefer, there is no reason to high-pass your speakers, IMO. You simply need to adjust the sub's low-pass to the speaker's in-room low-end performance. You can't just arbitrarily adjust this and call it quits. The best setting needs to be determined empirically; if not with measurements, then by ear (and/or preference). And of course you have the sub's level to adjust, too.
"All men are frauds. The only difference between them is that some admit it. I myself deny it."