Lacombe, (or anybody really good with crossovers):

1) A link to a surplus house for capacitors is appreciated

2) Many tweeters have a resonance about 1,000 Hz, yet they recommend crossing over at 2,000 Hz or higher. Simon is crossing over at 24 db/octave. Counting his capacitor in series with the tweeter as a 6 db octave passive crossover, the tweeter's resonance point will be at least 24 db down at his lowest likely crossover point, (2,000 Hz). How important is it to have the tweeter's resonance damped when it will be so far below the level of the passband, (and removed from it by at least an octave)? By the way, I favor the fully active crossover approach just on general principle.

3) I have seen tantalum capacitors, and some called "tantalum electrolytic" capacitors. How good are the tantalums, and are the "tantalum electrolytics" any better than aluminum electrolytics for crossovers? They seem to have a high value of capacitance for the price.

Thank you.