This is the passive line level crossover at 2250Hz. It is a second order 12db/octave filter Linkwitz-Riley like.
V1-R10 represent the input source, R3,R6 represent the low and hi amplifier input impedance (my amplifiers), green marker is the low frequency output, red marker is the hi frequency output. These outputs drive the amplifiers. The outputs are 180 degrees out of phase, so at the amplifier output either mid/woofer or tweeter should be connected with reverse polarity. In place of R7 I used a larger variable resistor to adjust woofer-tweeter sensitivity.
F=1/(2*pi*R*C) (for R1=215, C1=330*10E-9 F=2243Hz)
Simulation Results:
