2018 BMW 640i Gran Coupe Speaker Sizes
The 2018 BMW 640i Gran Coupe factory audio system incorporates multiple locations for sound reproduction components. Center dash, front door panel, rear deck lid, and rear door panel locations accommodate 1 inch speakers and a 4 inch speaker size. Rear side panel locations support 4 inch units, while below seats locations accept 8 inch units. Compatible speaker types for replacement and upgrade include tweeter, midrange, and subwoofer units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Center Dash | 1 | Tweeter |
|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 4 | Midrange |
|
| Rear Side Panel | 4 | Midrange |
|
2018 BMW 640i Gran Coupe Speaker Replacement Summary
10
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 4 High: 0Replacement priority:
High: 2 Medium: 7 Low: 1Additional Notes
- The 2018 BMW 640i Gran Coupe incorporates a multi-driver audio configuration with dedicated tweeters, midrange speakers, and subwoofers distributed across different cabin locations.
- Tweeters measuring 1 inch are positioned in the center dash, front door panels, rear deck lid, and rear door panels, suggesting a focus on high-frequency sound dispersion throughout the cabin.
- Midrange speakers at 4 inches occupy five locations including the center dash, both front and rear door panels, rear deck lid, and rear side panels, indicating extensive mid-frequency coverage.
- The presence of 8 inch subwoofers below the seats provides low-frequency reinforcement without consuming traditional trunk or door panel space.
- Replacing the tweeters could address degradation in high-frequency clarity, particularly in vocal and instrumental definition.
- Upgrading the midrange drivers might improve overall tonal balance and detail in the critical frequency range where most musical content resides.
- The factory configuration separates frequency ranges by speaker type rather than using full-range drivers, which typically allows for more precise sound reproduction.
- Aftermarket component speakers designed for dedicated tweeter and midrange applications would maintain the intended acoustic architecture of this system.
- The under-seat subwoofer location may limit upgrade options to shallow-mount or compact designs that fit within the existing spatial constraints.
- Sound improvement potential exists across the entire frequency spectrum given the number of speaker locations available for replacement.