Ram ProMaster City A-Pillar Speaker Size
The Ram ProMaster City A-Pillar accommodates a 1 inch speaker size across all listed model years. Compatible types for the audio system include tweeter replacement units. These specifications cover the range of 2015 to 2018.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2017 | Tweeter | 1 |
| 2016 | Tweeter | 1 |
| 2015 | Tweeter | 1 |
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 A-pillar location in the Ram ProMaster City positions speakers at the forward upper corners of the cabin interior, near the junction of the windshield and the front doors.
- Mounting at the A-pillar places drivers at roughly ear height for front-seat occupants, a position that reduces the distance between the sound source and the listener compared to door-mounted or dash-mounted placements.
- The A-pillar is a structurally narrow mounting surface, which constrains the physical diameter of any speaker installed there and limits available depth for larger driver assemblies.
- Across all 4 model years listed - 2015, 2016, 2017, and 2018 - the Ram ProMaster City A-pillar accommodates a 1-inch speaker diameter.
- A 1-inch driver diameter corresponds to a small diaphragm surface area, which is physically suited to reproducing high-frequency content rather than mid-range or bass frequencies.
- The tweeter type is the sole compatible speaker type listed for the Ram ProMaster City A-pillar across all specified model years.
- Tweeters are transducers designed to reproduce the upper portion of the audible frequency spectrum, generally from approximately 2,000 Hz up to 20,000 Hz, covering the range of consonants, overtones, and high-frequency audio detail.
- The A-pillar mounting position directs tweeter output toward the listening area from an elevated forward angle, which influences the perceived stereo imaging and high-frequency soundstage for front-seat occupants.
- A 1-inch tweeter at the A-pillar position relies on the narrow, rigid mounting structure of the pillar to minimize vibration-induced coloration that could affect high-frequency clarity.
- Because tweeters operate at high frequencies with short wavelengths, the A-pillar's near-ear placement reduces the degree to which high-frequency content diminishes over distance before reaching the occupant.