Mitsubishi Sigma Front Door Panel Speaker Size
The Mitsubishi Sigma front door panel accommodates a 6.5 inch speaker size. Compatible types for the location include midbass and full-range audio system units. These specifications apply to the 1990 model year.
| Year | Type | Size (inch) |
|---|---|---|
| 1990 | Midbass / Full-Range | 6.5 |
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 is the installation location across the listed fitment, placing speakers within the door cavity where the enclosure volume and surface material directly affect low-frequency response and cone excursion behavior.
- A 6.5-inch driver in a front door panel position occupies a mounting cutout that typically falls within the 150mm to 170mm diameter range, requiring adequate depth clearance behind the mounting surface to accommodate the basket and magnet assembly without contact against the inner door structure.
- Door panel installations generally involve a shallow mounting depth environment, meaning the speaker's total depth from the mounting flange to the rear of the magnet must be measured against the available cavity before fitment is confirmed.
- The 1990 Mitsubishi Sigma front door panel accepts a 6.5-inch driver, and compatibility with both midbass and full-range types indicates the mounting location supports either a two-way system role or a standalone single-driver configuration.
- A 6.5-inch cone surface area produces meaningful output in the upper bass and lower midrange bands, roughly 80Hz to 500Hz, making the driver well-suited for the front door position where lower frequency energy benefits from the door cavity acting as a partial acoustic boundary.
- Midbass drivers of the 6.5-inch size are designed with stiffer suspensions and motor structures optimized for controlled excursion in the bass and lower midrange, typically rolled off in the upper frequencies and crossed over to a separate tweeter in a component system.
- Full-range drivers of the 6.5-inch size use a more compliant suspension and often incorporate a small whizzer cone or diffuser to extend high-frequency dispersion, allowing a single driver to cover bass, midrange, and partial treble without an additional tweeter.
- Front door panel placement positions the driver near the lower portion of the listening environment, which influences the directional character of higher frequencies produced by a full-range 6.5-inch driver, as high-frequency dispersion narrows with increased cone size at elevated frequencies.
- The mounting orientation in a front door panel is typically angled slightly toward the cabin interior, which affects the off-axis listening angle for passengers seated at ear level above the driver's position.