So I’m RE-doing my response after reviewing a bit more information and a little testing. The Parts Express crossover works fine for a basic 12 DB per octave filter, but it uses the very lowest cost designed components, so if you have a higher end system you will notice it will smear & muddy up your audio in the mid and upper frequencies much like most low to mid fi stock speaker crossovers. It uses both an iron core inductor and basic electrolytic capacitor, with better parts it would be better, but the cost would go up quite a bit. Considering these factors I would not recommend it for the LRS, though the LRS also uses an only slightly better crossover for main part of the panel, better for the tweeter. Removing it and using the low level crossover in my preamp set to 55 hz presets a noticeable improvement over using the parts express high pass and the subs set at 80 hz. Mids and highs are cleaner and more convincing. For reference my wife would say there is absolutely no difference at all, so your mileage may vary.