1999 Toyota Avalon Speaker Sizes
The 1999 Toyota Avalon factory audio system features specific mounting locations that accommodate 1 inch speakers in the front door panel, while the front door panel and rear door panel accept 4 inch speakers and 5.25 inch units. Tweeter, midrange, midbass, and full-range units function as compatible speaker types for sound system replacement and upgrade endeavors.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| 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.