Looking for some ideas to clean up my bass in the sub. Here's our FOH setup. 2 QSC K12s and a QSC KW18 sub. Covers all of our gigs. No amp, wireless IEM for the band. Mixer is A&H MixWiz 16:3. Bass, kick and floor tom out thru AUX to sub, crossover set at 100hz before sub. Mains I engage the EXT SUB switch which cuts anything below 75hz. My bass sounds great through the main but kind of muddy in the sub.