Jan 05, 2015 · This way, the tweeter doesn’t ineffectually try to produce bass notes (this will produce distortion and could actually damage the tweeter) or vice-versa (woofers “beam” high frequencies unpleasantly). The component that splits the sound up is called a crossover. Passive vs active crossovers # Passive speakers have a passive crossover. Audiotek 500W CX3 2 Way 4 Ohm Car Audio Passive Crossover Networks (2 Pack) The Audiotek CX3 is one of the best passive car audio crossovers you can buy. This thing is housed in a steel casing with a bottom made of see through plexiglass allowing a view of the inner components.
The phase shift on a fourth-order crossover is 360 degrees = 0 degrees (no phase shift). Zobel Circuit (Impedance Stabilization) Even though speakers are rated at a certain "resistance" (i.e. 4 Ohms), the actual impedance varies with frequency (speakers have inductance).