Infiniti QX70 Rear Door Panel Speaker Size
The Infiniti QX70 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 QX70 positions speakers within the lower portion of the passenger cabin doors, placing the drivers at roughly seat-level height relative to rear occupants.
- Door panel mounting typically embeds the speaker basket into a recessed cavity within the door's inner skin, meaning available depth behind the mounting surface is a critical factor for speaker fitment.
- A 6.5 inch driver occupies a mid-range diameter class that balances cone surface area with the spatial constraints common to door panel cutouts, allowing reasonable low-frequency cone excursion without requiring the larger cavity depth associated with bigger woofer sizes.
- At 6.5 inches, the cone diameter produces enough radiating surface area to reproduce the upper bass and lower midrange frequencies that carry vocal fundamentals and instrument body, which are acoustically significant in rear cabin listening positions.
- The rear door panel location in the Infiniti QX70 places the driver relatively close to the floor of the door card, which acoustically tends to reinforce lower frequencies due to boundary loading effects from the nearby door trim and seat structure.
- A midbass driver is designed with a stiffer suspension and optimized excursion characteristics to handle the 80 Hz to 500 Hz frequency band, prioritizing low-frequency output and dynamic headroom over high-frequency extension.
- The midbass type is acoustically suited to the rear door panel location because the position naturally attenuates high frequencies through reflective interference and distance from listeners, making extended treble reproduction less relevant at that mounting point.
- A full-range driver is designed to reproduce a broad frequency spectrum from bass through treble within a single driver, using a single cone or cone-plus-whizzer configuration to extend high-frequency output beyond what a dedicated midbass unit produces.
- In the rear door panel position of the Infiniti QX70, a full-range 6.5 inch driver would be responsible for reproducing all frequency content directed to that location without relying on an additional tweeter mounted nearby on the door card.
- The 6.5 inch mounting diameter specification applies consistently across all 4 model years listed, meaning the physical cutout diameter and bolt pattern of the rear door panel remains unchanged across the 2014 through 2017 Infiniti QX70 production span covered in the specifications.