2017 BMW 640i Gran Coupe Speaker Sizes
The 2017 BMW 640i Gran Coupe factory audio system features multiple locations for speakers. Center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers and 1 inch units, while below seats support an 8 inch speaker size. Compatible speaker types for a replacement upgrade include tweeters, midrange units, and subwoofers.
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 |
|
2017 BMW 640i Gran Coupe Speaker Replacement Summary
9
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 7 Low: 0Additional Notes
- The 2017 BMW 640i Gran Coupe utilizes a multi-speaker configuration with dedicated tweeters and midrange drivers distributed across multiple cabin locations, suggesting a component-style factory audio architecture rather than traditional full-range coaxial speakers.
- Tweeters measuring 1 inch are positioned in the center dash, both front door panels, rear deck lid, and rear door panels, indicating a focus on high-frequency dispersion throughout the listening environment.
- Midrange drivers at 4 inches occupy the same locations as the tweeters, working in tandem to handle vocal and instrumental frequencies while the tweeters reproduce higher frequencies.
- An 8 inch subwoofer located below the seats handles low-frequency output, which may present installation challenges for aftermarket replacements due to space constraints in the under-seat location.
- Replacing the factory tweeters and midrange speakers with aftermarket components could potentially improve clarity and detail, particularly if the stock speakers have deteriorated or if higher sensitivity units are selected.
- The separate tweeter and midrange configuration allows for targeted upgrades, where one could replace just the tweeters for improved high-frequency response or just the midrange drivers for better vocal reproduction without necessarily replacing both.
- Sound staging might benefit from aftermarket component speakers in the front doors, as separates typically offer better imaging than coaxial designs when properly installed and aimed.
- The under-seat subwoofer location may limit upgrade options to shallow-mount designs, which could affect low-frequency extension compared to deeper cone subwoofers.