2015 BMW 640i Gran Coupe Speaker Sizes
The 2015 BMW 640i Gran Coupe factory audio system incorporates multiple locations for components. Center dash, front door panel, and rear door panel locations accept a 1 inch speaker size alongside 4 inch speakers, while below seats locations accommodate 8 inch units. Available component types for replacement and upgrade include tweeter, midrange, and subwoofer options.
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 Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 4 | Midrange |
|
2015 BMW 640i Gran Coupe Speaker Replacement Summary
7
total positions
4
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 4 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 5 Low: 0Additional Notes
- The 2015 BMW 640i Gran Coupe factory audio system incorporates a three-way speaker configuration with separate drivers for different frequency ranges, which allows for more precise sound staging compared to full-range or two-way designs.
- Tweeters are positioned in the center dash, front door panels, and rear door panels, suggesting the factory system prioritizes high-frequency dispersion throughout the cabin for enhanced clarity and imaging.
- The 4-inch midrange drivers located in matching positions to the tweeters indicate a component-style setup where midrange frequencies are handled separately from highs and lows, which can contribute to more accurate vocal and instrument reproduction.
- Replacement speakers for the tweeter positions would need to accommodate the 1-inch specification, which is a common size for aftermarket dome tweeters, though mounting depth and impedance compatibility should be verified before installation.
- The 4-inch midrange locations may present challenges for aftermarket upgrades since this size falls between the more common 3.5-inch and 5.25-inch speaker standards, potentially limiting direct replacement options without custom mounting solutions.
- An 8-inch subwoofer mounted below the seats provides low-frequency reinforcement in a space-efficient location, though this positioning may limit bass output compared to larger trunk-mounted configurations found in some aftermarket installations.
- Upgrading the midrange and tweeter components could yield noticeable improvements in clarity and detail, particularly in the mid and high frequencies where the human ear is most sensitive to distortion and tonal accuracy.
- The presence of dedicated subwoofer placement suggests that replacing or upgrading this component might be prioritized for those seeking enhanced bass response without the need for external amplification or enclosure modifications.