1999 Lexus LS400 Speaker Sizes
The 1999 Lexus LS400 speaker size chart provides factory audio system specifications for replacement or aftermarket upgrade purposes. Information includes speaker locations in the front door panel, rear door panel, and rear deck lid. Data covers original equipment specifications to assist with aftermarket component installations and factory audio system modifications.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Deck Lid | 8 | Woofer |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
1999 Lexus LS400 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 LS400 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 Lexus LS400 features three distinct speaker locations with varying sizes, suggesting a tiered audio system where rear deck lid speakers handle lower frequencies while door panels manage mid-range and higher frequencies.
- Front door panel speakers at 5.25 inches accept both midbass and full-range types, indicating flexibility in replacement strategy depending on whether the existing system uses separate tweeters or relies on full-range drivers for complete frequency coverage.
- Rear door panel speakers measure 6.5 inches and support the same midbass or full-range configuration, potentially allowing for a different voicing than the front doors or matching driver types for consistent timbral characteristics throughout the cabin.
- The 8-inch rear deck lid speakers are designated for woofer duty, suggesting these handle bass frequencies below what the door panel speakers reproduce, though the lack of subwoofer designation indicates they likely cover mid-bass through upper-bass rather than deep sub-bass frequencies.
- Replacing the rear deck lid woofers first could yield noticeable improvements in bass response and overall system dynamics, particularly since larger drivers typically provide greater output capability and lower distortion in their operating range compared to smaller door speakers.
- The radio in the 1999 Lexus LS400 accommodates both single DIN and double DIN head units, providing options for aftermarket integration that could enhance source quality and processing capabilities feeding the speaker system.
- Component speaker systems might integrate well with the front 5.25-inch locations by installing separate tweeters and using the existing openings for dedicated midbass drivers, potentially offering improved imaging and frequency extension over full-range replacements.
- The size progression from 5.25 inches in front to 6.5 inches in rear doors and 8 inches in the deck suggests the factory system may have distributed frequencies with rear speakers handling progressively lower ranges, though this depends on crossover configuration in the original amplifier or head unit.