Plymouth Colt Rear Deck Lid Speaker Size
The Plymouth Colt rear deck lid accommodates a 5.25 inch speaker size across all listed model years. Compatible speaker types for the location include midbass and full-range audio system units. These specifications cover the 1990 to 1992 model year replacement chart range.
| Year | Type | Size (inch) |
|---|---|---|
| 1992 | Midbass / Full-Range | 5.25 |
| 1991 | Midbass / Full-Range | 5.25 |
| 1990 | 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 rear deck lid of the Plymouth Colt positions speakers horizontally within the parcel shelf, a surface that typically radiates sound upward toward the rear window and into the cabin through diffuse reflection.
- A 5.25 inch driver in a rear deck lid location operates within a semi-enclosed or lightly dampened cavity formed by the trunk space below and the rear window glass above, which influences how lower midrange frequencies develop and project into the passenger compartment.
- The 5.25 inch diameter represents a mid-sized cone area, capable of moving enough air to reproduce frequencies from approximately 80 Hz to 5 kHz, covering the core midrange band without requiring a dedicated enclosure in most deck installations.
- Midbass drivers are optimized for the lower portion of the midrange and upper bass frequencies, roughly 80 Hz to 500 Hz, where fundamental vocal tones, instrument body resonance, and punch from bass instruments are reproduced.
- In a rear deck lid position, a midbass driver takes advantage of the acoustic loading provided by the trunk cavity acting as a passive chamber, which can reinforce low-midrange output without additional enclosure construction.
- Full-range drivers are designed to reproduce a wide frequency band from bass through treble within a single cone and dust cap assembly, making a single driver capable of handling all audio frequencies assigned to the Plymouth Colt rear deck lid position without a crossover network.
- The rear deck lid placement positions speakers at ear height for rear-seat passengers but below ear level for front-seat occupants, resulting in an asymmetric soundstage characteristic of sedan-style parcel shelf installations.
- A 5.25 inch driver maintains a relatively compact mounting footprint, with a typical cutout diameter around 4.5 inches, meaning the rear deck lid of the 1990-1992 Plymouth Colt accommodates a moderate mounting depth without requiring significant vertical clearance into the trunk space.
- Full-range cone drivers in rear deck locations are subject to rear-window resonance and glass reflection, which can reinforce certain high-frequency content while creating interference patterns at specific frequencies depending on the angle and distance of the glass surface.
- The midbass type designation indicates a driver without a dedicated tweeter element, so high-frequency reproduction above approximately 5 kHz is not a design priority for speakers selected under that compatibility classification in the rear deck lid position.