2015 BMW 640i Speaker Sizes

The 2015 BMW 640i speaker size chart details factory audio system specifications and locations for replacement or aftermarket upgrade purposes. Information covers speakers in the center dash, front door panel, rear deck lid, rear side panel, and below seats. Specifications enable identification of compatible aftermarket speakers when upgrading from factory audio components.

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Speaker Details by Location
Location Size Type Notes
Below Seats 8 Subwoofer
  • Very limited height clearance
  • Medium replacement priority
  • Replacement difficulty: medium
Center Dash 4 Midrange
  • Requires dashboard disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
Center Dash 1 Tweeter
  • Requires dashboard disassembly
  • Medium replacement priority
  • Replacement difficulty: medium
Front Door Panel 1 Tweeter
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Front Door Panel 4 Midrange
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Deck Lid 1 Tweeter
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low
Rear Deck Lid 4 Midrange
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low
Rear Side Panel 1 Tweeter
  • Requires trim removal
  • Medium replacement priority
  • Replacement difficulty: medium
Rear Side Panel 4 Midrange
  • Requires trim removal
  • Medium replacement priority
  • Replacement difficulty: medium

2015 BMW 640i Speaker Replacement Summary

9 total positions
4 easy to replace
2 high priority
0 professional only

Replacement difficulty:

Low: 4 Medium: 5 High: 0

Replacement priority:

High: 2 Medium: 5 Low: 2

Additional Notes

  • The 2015 BMW 640i audio system utilizes a multi-way component configuration with dedicated tweeters, midrange drivers, and subwoofers positioned throughout the cabin.
  • Tweeters measuring 1 inch are installed in four locations: the center dash, front door panels, rear deck lid, and rear side panels, suggesting a focus on high-frequency dispersion across the listening area.
  • Midrange drivers at 4 inches occupy the same four locations as the tweeters, indicating a possible two-way component setup in each zone for handling mid-frequency response.
  • A single 8-inch subwoofer is positioned below the seats, which may provide low-frequency reinforcement without consuming cargo space in the deck or door areas.
  • Upgrading the midrange drivers might offer more noticeable improvements in vocal clarity and instrumental detail compared to replacing the smaller tweeters alone.
  • The symmetrical front and rear speaker arrangement could provide balanced sound staging for both front and rear passengers when matched components are used.
  • Aftermarket component sets with separate crossovers may require installation planning due to the distinct tweeter and midrange driver separation already present in the factory configuration.
  • The under-seat subwoofer location might limit replacement options to shallow-mount designs with similar depth constraints.