The crossovers are pretty basic, 2nd order all-pass filters on everything with a Zobel on the mids to clean up the upper range. I used all Dayton caps except a couple Solen, when we didn't show any in stock. Coils were all Jantzen 18 gauge 200 watt, I figured if I ever needed that kind of wattage, I would never have the equipment for it anyway, har har. Everything turned out relatively flat, a couple peaks in the mid section but nothing over 2 dB.