Scion xD Rear Door Panel Speaker Size
The Scion xD rear door panel accommodates a 6.5 inch speaker size across all available model years. Compatible types for the audio system include midbass and full-range replacement units. These specifications cover the 2008 to 2014 model year chart range.
| Year | Type | Size (inch) |
|---|---|---|
| 2014 | Midbass / Full-Range | 6.5 |
| 2013 | Midbass / Full-Range | 6.5 |
| 2012 | Midbass / Full-Range | 6.5 |
| 2011 | Midbass / Full-Range | 6.5 |
| 2010 | Midbass / Full-Range | 6.5 |
| 2009 | Midbass / Full-Range | 6.5 |
| 2008 | Midbass / Full-Range | 6.5 |
Speaker Types
| Type | Description |
|---|---|
| Midbass | A driver tuned for upper bass and lower midrange, roughly from 80 Hz to 500 Hz. It has longer cone travel than a full-range unit, which supports stronger bass in doors and panels. |
| Full-Range | 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 door panel location in the Scion xD positions speakers within the lower portion of the passenger cabin doors, where the drivers face inward toward the occupants at roughly seat level.
- Door panel installations mount speakers within a constrained cavity, where the sheet metal of the door interior and the panel itself form the enclosure behind the driver, influencing bass response and cone excursion behavior.
- Across all model years listed, the Scion xD rear door panel accepts a 6.5 inch speaker, a diameter that determines the physical cutout size, mounting hole pattern, and the maximum cone area available for moving air in that cavity.
- A 6.5 inch driver occupies a middle ground in cone surface area, producing enough cone displacement to reproduce lower midrange and upper bass frequencies effectively from a door-mounted position.
- The rear door panel location places the speaker at a distance from front-seat listeners, which means the 6.5 inch driver in the Scion xD rear doors contributes to the spatial fill and sense of depth in the listening environment rather than serving as a primary imaging source.
- Midbass drivers, one of the 2 compatible types listed for the Scion xD rear door panel, are engineered with stiffer suspensions and motor structures optimized to reproduce the bass and lower midrange bands, typically covering roughly 80 Hz to 500 Hz.
- The rear door panel location benefits from the directional characteristics of a midbass driver, as lower frequencies in the midbass range are largely omnidirectional, meaning the position relative to the listener is less critical than it would be for a tweeter or upper midrange driver.
- Full-range drivers, the second compatible type listed for the rear door panel, are designed to reproduce a wide frequency span from bass through treble within a single driver, which in a rear door location means a single cone is responsible for handling the entire audible spectrum assigned to that position.
- A full-range driver in the rear door panel must balance cone mass and stiffness to manage both low-frequency excursion and upper-frequency response, a design compromise that reflects the broad frequency demand of the full-range designation.
- The door panel environment for the Scion xD rear speakers introduces acoustic challenges common to door installations, including panel resonance, limited rear air volume behind the cone, and potential interference from window mechanisms occupying space within the door cavity.