1999 Lexus GS400 Speaker Sizes
The 1999 Lexus GS400 factory audio system features specific mounting locations that accommodate different audio components, where the rear deck lid accommodates a 10 inch speaker size, and front door panel and rear door panel accommodate 6.5 inch speakers. Compatible types for replacement and upgrade include subwoofers, midbass, and full-range units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Lid | 10 | Subwoofer |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
1999 Lexus GS400 Speaker Replacement Summary
3
total positions
3
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 3 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 2 Low: 01999 Lexus GS400 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 front door panel locations in the 1999 Lexus GS400 typically receive priority consideration during speaker upgrades, as these positions handle the primary mid-frequency and vocal reproduction in the factory audio configuration.
- Midbass drivers at 6.5 inches can provide improved lower midrange response compared to full-range alternatives, though full-range speakers may offer simpler installation without requiring separate tweeters or crossover networks.
- The rear deck lid subwoofer location differs from conventional trunk-mounted enclosures, which may affect bass response characteristics and loading patterns within the cabin environment.
- Both front and rear door panels share identical 6.5 inch speaker sizing, which could simplify bulk purchasing decisions or allow for matched component sets across multiple positions.
- The double DIN radio compatibility suggests potential head unit upgrade paths that may provide additional amplification or signal processing capabilities to support aftermarket speaker installations.
- A 10 inch subwoofer in the rear deck position may face space constraints compared to larger diameter options, though this size often balances low-frequency extension with installation practicality.
- Full-range speakers in door locations eliminate the need for mounting separate tweeters, though this configuration may limit high-frequency dispersion control and soundstage imaging precision.
- The rear door panel speakers might contribute to rear passenger audio coverage or provide ambient fill, depending on the overall system tuning and fade settings.