Subaru Legacy Rear Door Panel Speaker Size

Additional Notes

• The Subaru Legacy rear door panel is a speaker mounting location positioned within the lower portion of the rear passenger doors, placing drivers at roughly seat-level height along the sides of the cabin.
• Door panel mounting positions the speaker baffle against an interior trim surface, with the door cavity itself acting as a partially enclosed rear volume that influences low-frequency loading on the driver cone.
• A 6.5 inch driver occupies a cone diameter that supports meaningful cone surface area, which contributes to efficient displacement of air in the lower-midrange and upper-bass frequency regions without requiring the enclosure depth of a dedicated subwoofer.
• The physical diameter of a 6.5 inch speaker makes it compatible with the mounting cutout dimensions typical of mid-size sedan rear door panels, where available depth behind the panel is limited by window mechanisms and door hardware.
• At the rear door location, a 6.5 inch driver is positioned to reinforce the lower half of the audible spectrum within the cabin, as larger cone area relative to smaller dash-mounted drivers allows greater excursion for bass and midbass reproduction.
• The Subaru Legacy rear door panel accepts midbass drivers, which are purpose-built to handle frequencies roughly between 80 Hz and 500 Hz, covering the lower-midrange and upper-bass range where punch and body in music reproduction originate.
• A midbass driver in the rear door panel location contributes to the spatial foundation of a multi-speaker system, as the rear placement distributes low-to-mid frequency energy throughout the cabin rather than anchoring it to the front stage alone.
• Full-range drivers are also specified as compatible for the Subaru Legacy rear door panel, meaning a single driver of the 6.5 inch size can handle the entire audible spectrum from bass through treble without requiring a separate tweeter at this location.
• A full-range driver in a rear door panel position operates across frequencies from approximately 50 Hz to 20 kHz, though the door cavity environment and panel reflections can affect the upper frequency performance compared to free-air or optimized enclosure conditions.
• Rear door placement positions the speaker at a lower angle relative to seated passengers, which affects the dispersion pattern of higher frequencies produced by a full-range driver, as tweeters and upper-midrange frequencies are more directional and more sensitive to the axis alignment between driver and listener ear level.
• The side-firing orientation of a rear door-mounted 6.5 inch driver means sound waves first travel laterally across the cabin before reaching rear passengers, which can contribute to a diffuse or enveloping sense of sound in that seating area.
• The consistent 6.5 inch mounting specification across all listed model years of the Subaru Legacy indicates the rear door panel opening dimensions remained uniform across the 1995 to 2014 range of the listed vehicles.