Infiniti Q50 Rear Door Panel Speaker Size
The Infiniti Q50 rear door panel accommodates a 6.5 inch speaker size and 5.25 inch speakers, with each location supporting these 2 unique sizes across the model's production span. Compatible types for all years include midbass and full-range audio units, representing the primary system configurations available. These specifications cover the 2014 to 2017 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 | 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 Infiniti Q50 rear door panel speaker location accommodates drivers mounted within the door structure, where the speaker cone faces the cabin interior and low-frequency output is reinforced by the door cavity acting as an enclosure.
- A 6.5 inch driver in a rear door panel position has sufficient cone surface area to reproduce lower midrange and upper bass frequencies, typically covering a range from approximately 60 Hz to 5 kHz depending on driver design.
- A 5.25 inch driver in the same rear door panel position has a smaller cone surface area, which reduces low-frequency extension compared to a 6.5 inch unit, with effective output generally starting closer to 80-100 Hz.
- The rear door panel location places the speaker at a lower height within the cabin, which tends to reinforce bass energy while limiting high-frequency dispersion toward seated occupants in the rear seat.
- Midbass drivers are designed to handle the frequency band between subwoofer-range bass and midrange frequencies, typically operating between roughly 80 Hz and 500 Hz, and are suited to the rear door location where bass reinforcement is a primary acoustic function.
- Full-range drivers are designed to reproduce a broad frequency spectrum from bass through treble within a single cone unit, making them an alternative compatible type at the rear door panel position across all listed model years.
- The 2014 Infiniti Q50 rear door panel accepts a 5.25 inch driver, which is a distinct mounting cutout dimension from the 6.5 inch opening specified for the 2015-2017 model years, indicating a physical change in the factory speaker recess between those model year groups.
- In a door panel installation, the mounting depth available behind the speaker cone is constrained by internal door hardware, window mechanisms, and vapor barriers, all of which affect the maximum allowable driver depth for either size.
- The 6.5 inch mounting diameter requires a larger cutout and mounting ring diameter than the 5.25 inch specification, meaning adapters or brackets may be necessary when substituting a different driver size into either mounting location.
- Both midbass and full-range types are listed as compatible at the rear door panel for all specified years, indicating the mounting location can accommodate either a dedicated low-midrange driver or a single driver covering the full audible spectrum.