For a passive crossover to work properly, an impedance equalization circuit should be implemented. Use this zobel network calculator.
![DIY - Loudspeaker | Low-end Speaker Craft - [DIY] TQWT(ML-Voigt Pipe) with Damp-Duct](https://i.pinimg.com/originals/ad/f7/b0/adf7b02bd15170b31397325a691b31b7.png)
