1999 Toyota Avalon Speaker Sizes
The 1999 Toyota Avalon speaker size chart provides factory specifications for replacement and upgrade applications. Information includes locations within the vehicle audio system, with aftermarket options available for front door panel and rear door panel positions. Data assists in identifying compatible speakers when replacing factory components or upgrading the audio system.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 4 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 4 | Midrange |
|
| Rear Door Panel | 5.25 | Midbass / Full-Range |
|
1999 Toyota Avalon Speaker Replacement Summary
5
total positions
5
easy to replace
3
high priority
0
professional only
Replacement difficulty:
Low: 5 Medium: 0 High: 0Replacement priority:
High: 3 Medium: 2 Low: 01999 Toyota Avalon 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 1999 Toyota Avalon factory audio system incorporates a multi-driver configuration in both front and rear door panels, with dedicated tweeters, midrange, and midbass speakers handling different frequency ranges.
- Front door panels contain three separate speaker locations: a 1-inch tweeter for high frequencies, a 4-inch midrange driver, and a 5.25-inch midbass or full-range speaker, suggesting a three-way component system design.
- Rear door panels feature two speaker positions each: a 4-inch midrange unit and a 5.25-inch midbass or full-range driver, indicating a two-way configuration for rear audio output.
- The 5.25-inch locations in both front and rear doors accept either midbass drivers or full-range speakers, providing flexibility when selecting replacement components based on whether the factory's multi-driver setup is retained or simplified.
- Tweeters are positioned only in the front door panels at 1 inch, which typically handle frequencies above 3-4 kHz for improved high-frequency dispersion and soundstage width.
- The 4-inch midrange drivers in all four doors likely reproduce vocal and instrumental frequencies between approximately 300 Hz and 3-4 kHz, forming the core of the audible spectrum.
- Replacing the factory speakers with aftermarket components of matching sizes could potentially enhance clarity, dynamic range, and overall tonal balance throughout the cabin.
- The multi-driver arrangement suggests that aftermarket component speaker systems with separate tweeters, midrange units, and woofers would integrate well with the existing mounting locations.
- Both Single DIN and Double DIN head units are compatible with the dashboard opening, allowing for receiver upgrades with modern features while maintaining factory speaker connections.
- The separation of frequency duties across multiple drivers per door may reduce intermodulation distortion compared to single full-range speakers attempting to reproduce the entire audible spectrum.