Second-Order (12 dB/octave) Butterworth

Component values:

High-pass:

C₁ = 1 / (√2 × π × f_c × R) = 0.225 / (f_c × R)
L₁ = (√2 × R) / (2π × f_c) = 0.225R / f_c

Low-pass:

L₂ = (√2 × R) / (2π × f_c)
C₂ = 1 / (√2 × π × f_c × R)

(Same values as HPF — symmetric network)

At crossover: Each section = −3 dB. Drivers sum 3 dB hot (over-peaked). Reverse tweeter polarity to correct: flat sum but with polarity inversion.