Infiniti QX50 Rear Door Panel Speaker Size
The Infiniti QX50 rear door panel accommodates a 6.5 inch speaker size across all listed model years. Compatible types for the location include midbass and full-range audio system units. These specifications cover the 2014 to 2017 range of model years.
| Year | Type | Size (inch) |
|---|---|---|
| 2017 | Midbass / Full-Range | 6.5 |
| 2016 | Midbass / Full-Range | 6.5 |
| 2015 | Midbass / Full-Range | 6.5 |
| 2014 | 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 Infiniti QX50 positions speakers within the lower portion of the passenger cabin doors, placing the drivers at roughly seat-level height relative to occupants in the rear seating row.
- Door panel enclosures are shallow and acoustically irregular, meaning the mounting depth and baffle material of the door skin directly influence low-frequency extension and overall output efficiency of any installed driver.
- A 6.5-inch driver occupies a diameter class that balances cone surface area with manageable mounting depth, making the size well-suited to the spatial constraints typical of door panel cavities.
- The 6.5-inch cone diameter produces sufficient radiating surface area to move air effectively in the upper bass and lower midrange frequencies, generally covering the range from approximately 60 Hz to 5 kHz depending on driver design.
- At the rear door panel position, a 6.5-inch driver operates at some distance from front-seat listeners, which can affect stereo imaging and time alignment relative to front-channel drivers in a full system configuration.
- The midbass type is engineered specifically for the frequency band between bass and midrange, typically handling approximately 80 Hz to 500 Hz, and a rear door panel location allows the driver to reinforce low-mid energy throughout the cabin.
- A midbass driver in the rear door panel of the Infiniti QX50 is not intended to reproduce high frequencies, so crossover filtering is required to limit the signal sent to the driver and prevent distortion above the driver's usable range.
- The full-range type is designed to reproduce a wide span of audible frequencies from a single driver, covering bass through treble without requiring supplemental tweeters or external crossover components in a basic installation.
- When a full-range driver is mounted in a rear door panel, the physical separation from the listening position and surrounding door cavity acoustics can reduce high-frequency clarity due to the directional nature of upper-midrange and treble dispersion from larger cones.
- The 6.5-inch mounting cutout diameter accepted by the Infiniti QX50 rear door panel across the 2014 through 2017 model range indicates a consistent factory opening that governs the maximum speaker diameter installable without panel modification.