1988 BMW 735i Speaker Sizes
The 1988 BMW 735i factory audio system features front kick panel locations that accommodate 4x6 inch speakers, while the rear deck lid supports 5.25 inch units. Compatible speaker types for a replacement upgrade include full-range and midbass.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Kick Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1988 BMW 735i 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 BMW 735i 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 1988 BMW 735i front kick panel speakers use a 4x6 inch rectangular format, which can accommodate full-range drivers that handle multiple frequency ranges through a single speaker element.
- Rear deck lid positions accept 5.25 inch round speakers, offering flexibility between midbass drivers focused on lower frequencies or full-range speakers that cover broader frequency reproduction.
- Upgrading the front kick panel locations may take priority for improving vocal clarity and midrange definition, as these positions typically direct sound toward the listening area more effectively than rear-mounted speakers.
- The rectangular 4x6 inch form factor in front positions often presents tighter installation constraints than round speakers, potentially limiting aftermarket options to models specifically designed for this fitment.
- Selecting midbass drivers for the rear deck could enhance lower frequency output when paired with separate tweeters or full-range front speakers, creating a component-style configuration.
- Full-range speakers in both locations would provide a simpler replacement approach, maintaining the factory-style audio configuration without requiring additional crossovers or amplification.
- The single DIN radio opening allows for aftermarket head unit installation, which could provide improved power output and signal processing to drive replacement speakers more effectively.