The GMC Jimmy rear location accommodates a 6x9 inch speaker size across all listed model years. Full-range units are the compatible type for the audio system in this configuration. These specifications cover the years 1990 through 1999.
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 speaker location in the GMC Jimmy accommodates a 6x9 inch mounting footprint across all listed model years.
A 6x9 inch speaker features an oval cone geometry, which produces a larger radiating surface area than a circular 6.5 inch driver, allowing for greater low-frequency displacement within the same vertical mounting depth.
The elongated oval shape of a 6x9 inch driver is a common fit for rear deck or rear panel cavities in SUV and truck body styles, where horizontal width exceeds vertical height in the available cutout space.
Full-range is the only compatible speaker type listed for the rear location of the GMC Jimmy, meaning a single driver in each position handles the complete audible frequency spectrum rather than a dedicated woofer or tweeter.
A full-range driver reproduces low, mid, and high frequencies from a single cone assembly, typically covering approximately 50 Hz to 20 kHz, depending on the specific unit.
In a rear installation position, full-range drivers tend to contribute ambient low-midrange and bass reinforcement, as high-frequency content from the rear is less directionally significant to seated occupants facing forward.
The 6x9 inch cone area in the GMC Jimmy rear location supports stronger bass extension relative to smaller oval or circular formats, which is relevant given the full-range type requirement for that position.
Full-range speakers in a rear position do not require an external crossover network, as the driver is designed to operate across the full spectrum without a high-pass or low-pass filter dividing the signal.
The rear placement of a full-range 6x9 inch driver in an SUV enclosure like the Jimmy means the speaker operates within a semi-enclosed or open baffle environment behind the rear seating area, influencing its bass loading characteristics.