The crossover document has schematics for 500Hz, 600Hz, 800Hz, 1kHz, 1.2kHz and 1.6kHz crossovers. It has a chart showing R1, R2 and C1 values for various levels of tweeter attenuation. All have top-octave compensation that kicks in starting about two octaves above the crossover point.The plans for individual speaker models show which crossover should be used. Most have just a subset of the crossover document showing what is needed.