Mitsubishi Eclipse Rear Side Panel Speaker Size

Additional Notes

• The rear side panel is a fixed structural location within the cabin, meaning the mounting cutout dimensions are determined by the vehicle's body design and cannot be adjusted without modification.
• 3 distinct speaker sizes appear across the Mitsubishi Eclipse rear side panel specifications: 5.25 inch, 6.5 inch, and 6x9 inch.
• The 5.25 inch circular format, found in the 1995-1999 model years, reflects a smaller mounting cavity in the rear side panel during that generation. At 5.25 inches, cone surface area is reduced relative to larger formats, which narrows the low-frequency extension and places the driver's usable range higher in the bass and midrange bands.
• The 6.5 inch circular format, specified for the 2006-2012 model years, occupies a mid-sized mounting footprint in the rear side panel. The larger cone diameter compared to 5.25 inch units produces greater air displacement, supporting stronger output in the upper bass frequencies from a side-panel position.
• The 6x9 inch oval format, listed for the 1990-1994 and 2000-2005 model years, uses an elongated footprint that fits mounting locations where one dimension of the cavity is constrained. The oval geometry increases cone area beyond what a 6.5 inch circle provides, contributing to greater bass output from the rear side panel without requiring a deeper circular cutout.
• Midbass drivers are engineered to handle a focused band typically spanning roughly 80 Hz to 500 Hz, making the designation relevant in a rear side panel position where reinforcing lower midrange and upper bass frequencies adds body to the overall soundstage.
• Full-range drivers incorporate multiple radiating elements-commonly a woofer cone paired with a tweeter or whizzer cone-allowing a single driver to reproduce frequencies from bass through treble. In the rear side panel location, a full-range driver handles the complete audio spectrum without requiring additional tweeters in the same zone.
• The Mitsubishi Eclipse rear side panel locations compatible with 5.25 inch and 6.5 inch sizes both permit either midbass or full-range driver types, meaning the mounting cavity accommodates the mechanical frame profiles of both driver configurations at those diameters.
• The 6x9 inch positions across all applicable model years are listed exclusively with full-range compatibility, indicating the mounting and wiring arrangement at those locations is paired with drivers handling the full audio spectrum rather than a band-limited midbass role.
• Side panel placements position speakers toward the rear cabin walls, which affects how sound radiates toward occupants. A midbass driver in the rear side panel directs low-frequency energy into the cabin space, where bass wavelengths are long enough to fill the interior without strong directional perception.
• The oval 6x9 inch format requires an oval cutout in the rear side panel, which differs in shape from the circular cutouts used for the 5.25 inch and 6.5 inch specifications. A circular speaker cannot be installed in an oval mounting location without an adapter plate.
• Mounting depth is a relevant factor at the rear side panel location because the cavity behind the panel may be constrained by structural elements. Both the 5.25 inch and 6.5 inch circular drivers, as well as 6x9 inch oval drivers, each carry manufacturer-specific depth dimensions that must clear the available depth in the panel cavity.