1979 GMC C/K Series 2500 Speaker Sizes
The 1979 GMC C/K Series 2500 speaker size chart provides factory specifications and locations for audio components in dashboard and rear door panel positions. Information covers replacement and aftermarket upgrade options for the original audio system, detailing speaker specifications at each factory location to assist with system modifications.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 3.5 | Full-Range |
|
| Rear Door Panel | 4x10 | Full-Range |
|
1979 GMC C/K Series 2500 Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 0Additional Notes
- The dashboard location in the 1979 GMC C/K Series 2500 uses a 3.5 inch full-range driver, which suggests it handles the entire frequency spectrum from a single cone unit rather than relying on a multi-component setup.
- The rear door panel position accommodates a 4x10 inch full-range speaker, an oval-format driver that tends to offer a broader soundstage across the lower cabin area compared to smaller round units.
- Given the size difference between the two positions, the rear door panel driver may contribute more noticeably to overall audio output, as larger cone surface area generally correlates with greater acoustic displacement.
- Both positions appear limited to full-range compatibility, which could suggest that component or coaxial multi-way systems with passive crossovers may not be straightforward replacements without fitment modifications.
- Replacing the rear door panel speakers might be considered a higher priority for sound improvement, since the larger 4x10 inch format likely handles more of the audible frequency range with greater efficiency than the 3.5 inch dashboard unit.
- The 3.5 inch dashboard placement, while smaller, still represents an opportunity to improve high-frequency clarity in the front soundstage, particularly since full-range drivers at that size tend to roll off lower frequencies more noticeably.