
Crossovers, wire and solder

Crossover with inductor attached
An inductor or a reactor is a passive electrical component that can store energy in a magnetic field created by the electric current passing through it

Soldering iron

Soldered on capicitor
A capacitor is a passive electronic component consisting of a pair of conductors separated by a dielectric (insulator). When there is a potential difference (voltage) across the conductors, a static electric field develops in the dielectric that stores energy and produces a mechanical force between the conductors.

crossover with the wires soldered on to it