17.5k in the hp and 20k in the low pass will get you ~ the same -4 dB point at ~ 255 Hz. You will end up with slightly more output from the 2231 below crossover and from the 2121 above crossover when...
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17.5k in the hp and 20k in the low pass will get you ~ the same -4 dB point at ~ 255 Hz. You will end up with slightly more output from the 2231 below crossover and from the 2121 above crossover when...
Here are some graphs:
JBL 5234A with 4343/4350 card - hp and lp are both 4 dB down at the crossover frequency ~ 255 Hz
Crown FFX-2 - hp and lp are both 3 dB down at the crossover frequency ~...
The 4343 used a 12 dB/octave active filter.
The easiest thing you can do with the FFX-2 would be to use all 16.6k resistors except R109 (R213) and R111 (R215), make those 18.0k. This will yield...