Infiniti M37 Headrest Speaker Size
The Infiniti M37 headrest location accommodates a 2 inch speaker size across all listed model years. Tweeter units are the compatible audio system replacement type for these positions. These specifications cover the 2011 to 2013 range of model years.
| Year | Type | Size (inch) |
|---|---|---|
| 2013 | Tweeter | 2 |
| 2012 | Tweeter | 2 |
| 2011 | Tweeter | 2 |
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. |
Additional Notes
- The headrest location in the Infiniti M37 positions speakers directly behind the occupant's ears, placing the drivers at an unusually close range relative to the listener.
- A 2-inch driver diameter is among the smallest common speaker sizes, which limits low-frequency excursion but allows for compact, flush mounting within the confined cavity of an automotive headrest.
- The small physical volume of a headrest housing restricts enclosure depth and baffle area, conditions that suit a 2-inch driver more closely than a larger cone would permit.
- Tweeters are high-frequency transducers, typically reproducing signals in the range of approximately 2,000 Hz and above, making them acoustically suited to handle only the upper portion of the audio spectrum.
- At the close proximity of a headrest-mounted position, high-frequency content from a tweeter reaches the listener's ears with minimal distance-related attenuation, which is acoustically significant given how directional treble frequencies are.
- Tweeters rely on crossover networks or passive filtering to block low-frequency signals, as small diaphragms are not mechanically designed to handle the excursion demands of bass or midrange reproduction.
- The Infiniti M37 headrest speaker specification lists a 2-inch tweeter as the compatible configuration across the 2011, 2012, and 2013 model years, indicating a consistent mounting cavity size throughout that production range.
- Because tweeters are highly directional at higher frequencies, a headrest mounting position places the dispersion axis aimed directly toward the ear canal, maximizing on-axis frequency response for the seated occupant.
- A 2-inch tweeter installed at headrest height creates a near-field listening condition, where direct sound from the driver reaches the ear before significant cabin reflections arrive, affecting the perceived spatial character of the audio.