Looking for some of that magical SBAF non-bullshit in the realm of passive speaker crossovers. At the moment I am personally planning on a simple 2-way circuit with 2 caps, 2 coils, and an L-pad (variable initially, fixed resistors eventually) for a set of B&C DE250 in SEOS-12 horns and Beyma 12" woofers crossed at ~1khz. Options for the present and future include baffle step EQ and Zobel networks for the woofer and a shelf filter from 2-5khz for the horns. Any tips here would be welcome - for now, I have a decent calibrated mic setup and want to see what actually happens before throwing in more components. I want to do everything possible for these speakers to scale up to the combo of a Gumby and a First Watt F5 (DIY). In addition to the above, my biggest current questions are in component choice, where to spend money to get the best effect. Capacitors - My current impression is that the capacitor in the signal path of the high pass is the most important component. The Capacitors thread rates the white Audyn Reference and the Jantzen Z-Superior caps as being very good for speakers - I've also heard the basic Mundorf Supremes would be good, and all of these choices are somewhat reasonable at $30-50 for a 10uF cap. Any more I should look at? Is the quality of the series wired cap in the woofer low-pass important, or can I get away with something cheap like a Dayton or Audyn Q4 with little to no ill effects? As for inductors and resistors, admittedly I have done little research. I have some 18awg Jantzen air cores in my cart at the moment, which seemed reasonably priced. Any comments or advice would be greatly appreciated!