Mitsubishi Diamante Rear Deck Lid Speaker Size

Additional Notes

• The rear deck lid is a horizontal surface positioned at the base of the rear windshield, above the trunk cavity, placing speakers in a rear-firing or upward-angled orientation relative to the cabin.
• Mounting on the rear deck lid positions speakers at a distance from the front listening area, which influences how low-frequency and midrange energy travels forward through the cabin.
• The Mitsubishi Diamante rear deck lid accommodates 2 distinct speaker footprints across its production years: the 6.5-inch round format and the 6x9-inch oval format.
• A 6.5-inch driver in a rear deck lid location handles the mid-bass and midrange frequency bands, roughly 80 Hz to 5 kHz, where cone mass and excursion capability are suited to reproducing vocal fundamentals and upper bass from behind the seating area.
• The 6x9-inch oval format has a larger cone surface area than a 6.5-inch round driver, which increases low-frequency displacement and allows the driver to move more air, reinforcing bass reproduction from the rear deck position.
• In the Mitsubishi Diamante rear deck lid, the 6x9-inch format is listed exclusively with the full-range type, meaning a single driver in that location is expected to cover the full audible spectrum without supplemental tweeters in the same mount.
• Full-range speakers are designed to reproduce low, mid, and high frequencies from a single driver unit, typically through a combination of a woofer cone and an integrated whizzer cone or dome tweeter to extend high-frequency output.
• Midbass speakers are optimized for the lower-midrange and bass frequencies, generally from approximately 80 Hz to 500 Hz, and are not intended to reproduce high frequencies on their own, making them dependent on separate tweeters elsewhere in the system.
• The 6.5-inch rear deck lid location on the Mitsubishi Diamante supports both midbass and full-range types, indicating the mounting cavity can physically accommodate either a dedicated midbass driver or a full-range unit within the same 6.5-inch diameter cutout.
• Rear deck lid placement inherently subjects speakers to acoustic coupling with the trunk volume below, which can affect bass resonance and output level depending on whether the enclosure is sealed or open to the trunk cavity.
• The year 2000 Mitsubishi Diamante rear deck lid lists both a 6x9-inch and a 6.5-inch fitment, indicating the 2000 model year may have had multiple trim or configuration variants with different speaker cutout dimensions at that location.