1988 Audi 90 Speaker Sizes
The 1988 Audi 90 speaker size chart displays factory speaker locations and specifications for replacement or aftermarket audio system upgrades. Information covers dashboard and rear deck lid positions. Data includes factory specifications to assist with identifying compatible aftermarket speakers for audio system installations.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
1988 Audi 90 Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01988 Audi 90 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The dashboard locations in the 1988 Audi 90 accommodate 4-inch midrange speakers, which typically handle the critical vocal and instrument frequencies between approximately 300 Hz and 5 kHz, making them potentially significant for overall clarity in the listening environment.
- Rear deck lid positions accept 6.5-inch speakers with flexibility between midbass and full-range types, where midbass drivers would focus on lower frequencies while full-range units would attempt to reproduce a broader spectrum from a single driver.
- Replacing the dashboard midrange speakers first might offer noticeable improvements in vocal reproduction and instrumental detail since these frequencies tend to be most prominent in the listening position, particularly in vehicles where front-stage presentation matters.
- The 6.5-inch rear location could benefit from midbass speakers if the system includes separate tweeters and midranges, or from full-range speakers if a simpler two-way configuration is preferred for the rear fill.
- The single DIN radio opening provides standard aftermarket head unit compatibility, which may be relevant when upgrading speakers since newer source units often provide better signal quality and amplification than factory equipment from this era.
- Speaker size constraints suggest that low-frequency extension will be limited, particularly from the 4-inch dashboard units, so managing bass expectations or considering additional subwoofer integration might be worth considering for those seeking fuller low-end response.
- The combination of smaller front speakers and mid-sized rear speakers indicates a system design that likely relied on the rear deck for most of the bass output while the dashboard handled midrange duties.