I need help with a crazy idea So I have this cab I built to house 2 speakers. A 15 inch, 4ohm 400watt 40DB low, and a 18 inch 4 ohm 400 watt 38DB low. I play a 5 string bass and want to basically send the lower frequencies of the low B to the 18 inch with a lower DB rating and the rest to the wider range 15. will a passive crossover solve all of the my problems? Or will it just work that way? I plan on wiring it in series.