Infiniti M37 Front Door Panel Speaker Size
The Infiniti M37 front door panel accommodates a 1 inch speaker size, along with 3 inch and 6x9 inch speakers across all listed model years. Compatible audio types for the front door panel include midrange, tweeter, and full-range system units. These specifications cover the 2011 to 2013 model year range.
| Year | Type | Size (inch) |
|---|---|---|
| 2013 | Midrange | 3 |
| 2013 | Tweeter | 1 |
| 2013 | Full-Range | 6x9 |
| 2012 | Midrange | 3 |
| 2012 | Tweeter | 1 |
| 2012 | Full-Range | 6x9 |
| 2011 | Midrange | 3 |
| 2011 | Tweeter | 1 |
| 2011 | Full-Range | 6x9 |
Speaker Types
| Type | Description |
|---|---|
| Tweeter | A small driver built for high frequencies, typically from about 2,000 Hz to 20,000 Hz. It adds treble detail and clarity and is usually mounted near ear level or aimed at the listener. |
| Midrange | A driver for the middle of the audible range, typically from about 300 Hz to 5,000 Hz, where vocals and most instruments sit. It is often paired with a tweeter and a woofer. |
| 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 front door panel of the Infiniti M37 is a vertical surface mounted within the interior door structure, positioning speakers along the lower and mid sections of the cabin's side walls.
- Door panel installations distribute acoustic output laterally across the cabin, with speaker placement height and angle influencing how sound reaches the listening plane of seated occupants.
- The 6x9 inch oval configuration occupies a larger surface area than a round speaker of equivalent nominal size, allowing greater cone excursion and lower-frequency reproduction suited to the door panel's typically reinforced lower cavity.
- A 6x9 inch full-range speaker is designed to reproduce a wide portion of the audible spectrum from a single driver, covering low-mid bass through upper midrange frequencies within one enclosure point on the door panel.
- The 3 inch midrange driver handles the vocal and instrument presence frequencies, generally spanning the 300 Hz to 5 kHz range, where much of speech intelligibility and tonal clarity is concentrated.
- A 3 inch cone diameter limits low-frequency extension due to reduced cone surface area and excursion capacity, making the midrange role acoustically appropriate for a driver of this size in a door panel context.
- The Infiniti M37 front door panel accommodates a 1 inch tweeter alongside the midrange and full-range drivers, indicating a multi-point speaker layout within the door structure.
- A 1 inch tweeter is a high-frequency driver, typically reproducing signals above 2 kHz to 3 kHz, where shorter wavelengths benefit from the small diaphragm size for controlled directional dispersion.
- Tweeter placement within the front door panel affects the high-frequency arrival angle relative to the listener, as door-mounted tweeters project sound from a lower and more lateral position than dash or A-pillar locations.
- The simultaneous presence of a full-range, a midrange, and a tweeter specification for the front door panel indicates 3 distinct speaker positions or mounting locations within the door assembly across the listed model years.