Acura RL Rear Door Panel Speaker Size
The Acura RL rear door panel accommodates a 6.5 inch speaker size and 5.25 inch speakers, as the location supports both unique speaker sizes across the model's production range. Compatible audio system replacement units include midbass and full-range types. The specifications in this chart cover the years 1996 through 2012.
| Year | Type | Size (inch) |
|---|---|---|
| 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 |
| 2007 | Midbass / Full-Range | 6.5 |
| 2006 | Midbass / Full-Range | 6.5 |
| 2005 | Midbass / Full-Range | 6.5 |
| 2004 | Midbass / Full-Range | 5.25 |
| 2003 | Midbass / Full-Range | 5.25 |
| 2002 | Midbass / Full-Range | 5.25 |
| 2001 | Midbass / Full-Range | 5.25 |
| 2000 | Midbass / Full-Range | 5.25 |
| 1999 | Midbass / Full-Range | 5.25 |
| 1998 | Midbass / Full-Range | 5.25 |
| 1997 | Midbass / Full-Range | 5.25 |
| 1996 | Midbass / Full-Range | 5.25 |
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 Acura RL rear door panel is a recessed mounting location set within the interior door cavity, where the speaker cone faces inward toward the passenger cabin rather than firing directly at ear level.
- Door panel locations introduce reflective surfaces and limited enclosure volume, both of which affect low-frequency loading and cone excursion behavior in any driver installed there.
- The 6.5 inch mounting diameter applies to the Acura RL rear door panel across the 2005 through 2012 model years, representing a larger cone surface area than the earlier generation and supporting greater acoustic displacement in the low-frequency range.
- The 5.25 inch mounting diameter applies to the 1996 through 2004 model years, with the smaller cone area producing comparatively less air displacement, which tends to limit extension into the lower bass registers relative to a larger diameter driver in the same location.
- A 6.5 inch driver in a rear door panel can reinforce midbass frequencies more effectively than a 5.25 inch driver because the larger radiating surface moves more air volume within the shallow door cavity.
- Midbass drivers are designed to handle the frequency band roughly between 80 Hz and 500 Hz, focusing on the lower midrange and upper bass regions rather than extended low-frequency reproduction or high-frequency detail.
- In a rear door panel, midbass drivers contribute warmth and body to the overall soundstage, operating in a frequency range where door panel resonance and cabin acoustics have a pronounced effect on perceived output.
- Full-range drivers cover a broader spectrum, typically from the upper bass region through the high frequencies, making them capable of operating as a standalone transducer within the rear door location without requiring supplemental tweeters at that position.
- The rear door panel position places the speaker at a lower height within the cabin, which affects the directional character of high-frequency content reproduced by any full-range driver installed there, since high frequencies are more directional and more sensitive to placement angle than bass frequencies.
- Both the 5.25 inch and 6.5 inch mounting cutouts across the entire Acura RL rear door panel specification share the same compatible type designations, indicating the door cavity geometry accommodates either driver type regardless of cone diameter generation.