The Nissan Pulsar NX rear side panel accommodates a 6x9 inch speaker size. Full-range units represent the compatible speaker types available for the location. These specifications cover the 1990 model year.
A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems.
Additional Notes
The rear side panel location in the 1990 Nissan Pulsar NX is designed to accommodate a 6x9 inch speaker footprint, meaning the mounting cavity and baffle area are sized to that oval speaker template.
A 6x9 inch driver occupies a larger surface area than round mid-range alternatives, which increases cone displacement and supports greater low-frequency output from a rear side panel position.
The rear side panel is a structural enclosure location, typically bounded by the vehicle's quarter panel metalwork, which affects the available depth behind the mounting surface and can influence how a speaker's rear wave interacts with the installation space.
The Nissan Pulsar NX rear side panel, as a 1990 model fitment, places the speaker toward the back of the cabin, a position that contributes to ambient and spatial sound distribution within the passenger compartment rather than direct forward projection.
Full-range drivers are designed to reproduce the audible frequency spectrum from low bass through high treble within a single cone-and-tweeter unit, eliminating the need for a crossover network at the head unit or amplifier stage.
At the 6x9 inch size, a full-range driver uses the larger cone area to handle lower frequencies while relying on a whizzer cone or integrated tweeter to extend high-frequency response, balancing both roles within one unit.
The rear side panel mounting position means the speaker fires into the passenger cabin from a lateral angle, which affects stereo imaging and the degree to which high-frequency dispersion from the full-range tweeter element reaches the listening area.
Full-range compatibility at the rear side panel indicates the location is served by a single driver per channel rather than a component system split between woofer and separate tweeter, consistent with a factory-style passive installation.