1999 Porsche 911 Speaker Sizes
The 1999 Porsche 911 speaker size chart provides factory specifications and aftermarket replacement options for audio system locations. Information covers front door panel and rear door panel speaker positions. Details include compatible speaker types and specifications for factory audio system upgrade planning. Data assists with identifying appropriate aftermarket speakers for each installation location within the vehicle.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 5.25 | Midbass / Full-Range |
|
1999 Porsche 911 Speaker Replacement Summary
2
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 1 Low: 01999 Porsche 911 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The factory audio system in the 1999 Porsche 911 uses 5.25 inch speakers in both front and rear door panel locations, suggesting a standardized approach to the original equipment configuration.
- These door panel positions accept either midbass drivers or full-range speakers, giving some flexibility in component selection based on whether a separate tweeter system is planned or a standalone solution is preferred.
- Midbass drivers typically handle frequencies from roughly 80Hz to 2kHz and require additional tweeters for higher frequencies, while full-range speakers attempt to reproduce a broader spectrum without supplementary components.
- The 5.25 inch format represents a mid-size speaker category that balances cone area for bass response against the physical constraints of door panel mounting depths and widths.
- Aftermarket speakers in this size class often provide noticeable improvements over factory units through the use of materials like polypropylene or treated paper cones, silk or aluminum dome tweeters in coaxial designs, and rubber surrounds that resist environmental degradation.
- Door panel speakers in the 1999 Porsche 911 likely serve as the primary sound source for both front and rear passengers, making their performance characteristics central to overall listening quality.
- Component speaker systems with separate woofers and tweeters generally offer superior imaging and frequency separation compared to coaxial full-range units, though installation complexity increases.
- The radio opening accommodates both single DIN and double DIN head units, which may influence amplifier integration options and signal processing capabilities that feed the door speakers.
- Sensitivity ratings and impedance specifications of replacement speakers should align with the output capabilities of either the factory radio or any aftermarket amplification being considered.
- Power handling capacity becomes relevant when aftermarket amplifiers are introduced, as factory speaker locations can accommodate components rated significantly higher than original equipment thermal limits.