Plymouth Colt Front Door Panel Speaker Size
The Plymouth Colt front door panel accommodates a 6.75 inch speaker size across all listed model years. Compatible types for the location include midbass and full-range speakers. These specifications cover the 1990 to 1992 model range.
| Year | Type | Size (inch) |
|---|---|---|
| 1992 | Midbass / Full-Range | 6.75 |
| 1991 | Midbass / Full-Range | 6.75 |
| 1990 | Midbass / Full-Range | 6.75 |
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 front door panel location on the Plymouth Colt positions speakers within the lower portion of the door, mounted against a flat baffle surface on the door's interior skin, placing the driver at roughly knee-to-lower-torso height relative to seated occupants.
- Door panel installations typically involve a shallow mounting depth environment, where the cavity behind the speaker cone is formed by the door's inner and outer metal skins rather than a dedicated enclosure.
- The 6.75-inch diameter refers to the outer frame size of the driver, with an effective cone area that supports extended low-frequency reproduction compared to smaller 4- or 5-inch drivers, making the front door panel on the Plymouth Colt suitable for bass-contributing placement.
- A 6.75-inch driver in a door location benefits from the door cavity acting as a semi-sealed or ported acoustic space, which can reinforce lower frequencies produced by the cone.
- At 6.75 inches, the driver's cone mass and surface area are large enough to move the air volume necessary for midbass frequencies, generally spanning the 80 Hz to 500 Hz range, which corresponds to the lower vocal fundamentals and the body of most musical instruments.
- Midbass drivers are purpose-built to handle the lower portion of the midrange spectrum, operating with greater cone excursion and a surround design suited to the mechanical demands of reproducing frequencies below 500 Hz in an automotive door environment.
- Full-range drivers at 6.75 inches are designed to reproduce frequencies from the low bass through the upper midrange and, in some designs, into lower treble, using a combination of a woofer cone and a whizzer cone or treated surround to extend high-frequency dispersion.
- In the front door panel location, a full-range 6.75-inch driver handles the entire audible spectrum without requiring a separate tweeter, relying on the whizzer cone or other dispersion structures to project higher frequencies into the cabin.
- The front door panel position on the Plymouth Colt places the speaker's output axis directed across the cabin floor rather than toward the listener's ear axis, which affects the perceived high-frequency presence since high frequencies are more directional than low frequencies.
- Midbass drivers installed in the Plymouth Colt front door panel are typically crossed over to a separate tweeter mounted higher in the door or dash, with the door location handling frequencies where directional perception is less sensitive to vertical positioning.