I use two e112 subs in my system using the internal high pass between my pre and amp. I also tried the same setup without the crossover and passing under them main for a more common setup. There is no substitute for the crossover. Without it they sounded slow/off pace but with it turned on it is seem less (enough for all but the extremely picky). But I wish the e112 has room correction, or they could add the crossover to the f112.
