Definitions for "Passive Crossover"
Circuitry inside a speaker cabinet which takes a speaker level signal and divides it at a given frequency point without any additional power applied. The separate output signals then feed the proper drivers in the cabinet (In a 3-way system: low-frequencies go to the woofer, mid frequencies go to the mid-range driver, and high frequencies go to the tweeter or horn.)
A crossover network that divides audio frequencies without any active amplification or buffering components and which uses only resistors, capacitors and inductors.
This divides the signal into bands to be fed to the individual drivers in a system. It is either installed into the speaker cables or, in its most simple form, appears as a capacitor fitted to the back of the speaker. More upmarket passive crossovers have different terminals or switching to adjust the levels between the bands.