A coaxial passive line array is a loudspeaker system that combines a coaxial driver (where the tweeter is positioned in front of and on the same axis as the woofer) with a passive line array design (multiple speakers stacked vertically with no internal amplifiers) to achieve controlled and consistent sound projection. The "passive" aspect means it requires an external amplifier to function, while the "line array" configuration uses multiple modules to focus sound and the "coaxial" design uses a single driver for both mid and high frequencies, leading to a point-source sound with excellent clarity.