Chevrolet HHR Rear Side Panel Speaker Size
The Chevrolet HHR rear side panel accommodates an 8 inch speaker size across all listed model years. The compatible audio system replacement type for the location is a woofer. These specifications cover a range from 2006 to 2011.
| Year | Type | Size (inch) |
|---|---|---|
| 2011 | Woofer | 8 |
| 2010 | Woofer | 8 |
| 2009 | Woofer | 8 |
| 2008 | Woofer | 8 |
| 2007 | Woofer | 8 |
| 2006 | Woofer | 8 |
Speaker Types
| Type | Description |
|---|---|
| Woofer | A larger driver for low frequencies, typically from about 40 Hz up to 1,000 Hz. It delivers most of the bass and lower midrange in a door or panel speaker system. |
Additional Notes
- The rear side panel location in the Chevrolet HHR places speakers within the enclosed rear quarter structure, a position that interacts with the interior cabin volume and rear passenger space to shape low-frequency sound propagation toward the front listening area.
- An 8-inch driver occupies a larger cone surface area than the 6.5-inch or 5.25-inch sizes commonly found in door and dash locations, allowing greater air displacement to reproduce lower bass frequencies with more physical output at the same power level.
- The Chevrolet HHR rear side panel accepts an 8-inch woofer across the 2006 through 2011 model years, establishing a consistent mounting dimension requirement for the entire production run of the vehicle.
- A woofer is a driver type designed to reproduce low-frequency content, generally operating in a range from approximately 40 Hz to 500 Hz, concentrating acoustic energy in the bass and upper-bass bands rather than midrange or high-frequency reproduction.
- Mounting an 8-inch woofer in the rear side panel positions a dedicated low-frequency driver away from the front of the cabin, which affects the spatial origin of bass reinforcement relative to the primary listening seats.
- The rear side panel cavity in the HHR functions as a partial enclosure for the woofer, and the structural volume behind the mounting surface influences the driver's low-frequency extension and overall output character.
- An 8-inch woofer requires a mounting cutout and depth clearance greater than smaller driver sizes, meaning the rear side panel must accommodate both the cone diameter and the basket depth without obstruction from interior trim or structural bracing.
- Because woofers are not designed for high-frequency reproduction, the rear side panel location in the HHR is acoustically designated for bass support rather than full-range or treble output.
- The relatively large cone area of an 8-inch driver makes directional dispersion of low frequencies less critical than with midrange or tweeter drivers, as bass wavelengths are long enough to propagate omni-directionally throughout the cabin from a rear-mounted position.