1991 Audi 100 Speaker Sizes
The 1991 Audi 100 factory audio system features a dashboard that accommodates 4 inch speakers, and the rear deck lid can accept a 6.5 inch speaker size. Midrange, midbass, and full-range units serve as compatible speaker types for a replacement and audio upgrade.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
1991 Audi 100 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: 01991 Audi 100 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 1991 Audi 100 front dashboard positions house 4-inch midrange speakers, which typically handle mid-frequency audio reproduction between approximately 300Hz and 5kHz, leaving bass frequencies to dedicated components elsewhere in the audio system.
- Rear deck lid locations in the 1991 Audi 100 accommodate 6.5-inch speakers that can function as either midbass drivers or full-range units, with the midbass configuration generally providing stronger low-frequency output when paired with separate tweeters.
- The larger 6.5-inch rear speakers may warrant replacement priority over the smaller front units when considering system-wide sound quality improvements, as they contribute more substantially to overall bass response and sound stage depth.
- The 4-inch front midrange speakers likely require aftermarket options specifically designed for midrange duty rather than full-range speakers, which could result in tonal imbalance if components are not properly matched to their intended frequency range.
- The single DIN radio opening suggests compatibility with a wide variety of aftermarket head units, potentially enabling power and signal quality improvements that would complement upgraded speaker installations throughout the vehicle.
- Full-range 6.5-inch speakers in the rear deck location would handle frequencies from bass through treble independently, while midbass-designated drivers would necessitate additional high-frequency components for complete audio coverage in the rear sound stage.